Author: "Kochmehrin, A." - Searchworks@Jio Institute Digital Library Search Results

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41 results on '"Kochmehrin, A."'

1. Charged particle multiplicity distributions for fixed number of jets inZ 0 hadronic decays

Author: Abreu, P., Adam, W., Adye, T., Agasi, E., Aleseev, Gd, Allen, P., Almehed, S., Alvsvaag, Sj, Amaldi, U., Anassontzis, Eg, Andreazza, A., Antilogus, P., Apel, Wd, Apsimon, Rj, Asman, B., Augustin, Je, Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, Dy, Baroncelli, A., Barring, O., Barrio, Ja, Bartl, W., Bates, Mj, Battaglia, M., Baubillier, M., Becks, Kh, Beeston, Cj, Begalli, M., Beilliere, P., Belokopytov, Y., Beltran, P., Benedic, D., Berrgren, M., Bertrand, D., Bianchi, F., Bilenky, Ms, Billoir, P., Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolubov, Pn, Bolognese, T., Bonesini, M., Bonivento, W., Booth, Psl, Borgeaud, P., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Bosworth, S., Botner, O., Bouquet, B., Bourdarios, C., Bowcock, Tjv, Bozzo, M., Braibant, S., Branchini, P., Brand, Kd, Brenner, Ra, Briand, H., Bricman, C., Brown, Rca, Brummer, N., Brunet, Jm, Bugge, L., Buran, T., Burmeister, H., Buytaert, Jama, Caccia, M., Calvi, M., Rozas, Ajc, Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., Caso, C., Castelli, E., Castillo, Mv, Gimenez, Mvc, Cattai, A., Cavallo, Fr, Cerrito, L., Chabaud, V., Chan, A., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, Ga, Chevalier, L., Chliapnikov, P., Chorowicz, V., Chrin, Jtm, Cirio, R., Clara, Mp, Collins, P., Contreras, Jl, Contri, R., Cortina, E., Cosme, G., Couchot, F., Crawley, Hb, Crennell, D., Crosetti, G., Crozon, M., Maestro, Jc, Czellar, S., Dagoret, S., Dahljensen, E., Dalmagne, B., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Daum, A., Dauncey, Pd, Davenport, M., David, P., Dasilva, W., Defoix, C., Delikaris, D., Dellariccia, Ba, Delorme, S., Delpierre, P., Demaria, N., Deangelis, A., Debeer, M., Deboek, H., Deboer, W., Declercq, C., Laso, Mdmd, Degroot, N., Delavaissiere, C., Delotto, B., Demin, A., Dijkstra, H., Diciaccio, L., Djama, F., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Eek, Lo, Eerola, Pam, Ehret, R., Ekelof, T., Ekspong, G., Peisert, Ae, Engel, Jp, Fassouliotis, D., Fearnley, Ta, Feindt, M., Fenyuk, A., Alonso, Mf, Ferrer, A., Filippas, Ta, Firestone, A., Foeth, H., Fokitis, E., Fontanelli, F., Forbes, Kaj, Franek, B., Frenkiel, P., Fries, Dc, Frodesen, Ag, Fruhwirth, R., Fuldaquenzer, F., Furnival, K., Furstenau, H., Fuster, J., Galeazzi, G., Gamba, D., Carcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, En, Gazis, Jp, Gerber, Jp, Giacomelli, P., Gokieli, R., Golob, B., Golovatyuk, Vm, Cadenas, Jjgy, Goobar, A., Gopal, G., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grossewiesmann, P., Grossetete, B., Gumenyuk, S., Guy, J., Haedinger, U., Hahn, F., Hahn, M., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., Demoncenault, Gh, Hao, W., Harris, Fj, Henkes, T., Hernandez, Jj, Herquet, P., Herr, H., Hessing, Tl, Hietanen, I., Higgins, Co, Higon, E., Hilke, Hj, Hodgson, Sd, Hofmokl, T., Holmes, R., Holmgren, So, Holthuizen, D., Honore, Pf, Hooper, Je, Houlden, M., Hrubec, J., Hulth, Po, Hultqvist, K., Ioannou, P., Isenhower, D., Iversen, Ps, Jackson, Jn, Jalocha, P., Jarlskog, G., Jarry, P., Jeanmarie, B., Johansson, Ek, Johnson, D., Jonker, M., Lonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Kapusta, F., Karlsson, M., Karvelas, E., Katsanevas, S., Katsoufis, Ec, Karanen, R., Kesteman, J., Khomenko, Ba, Khovanski, Nn, King, B., Kjaer, Nj, Klein, H., Klempt, W., Klovning, A., Kluit, P., Kochmehrin, A., Koehne, Jh, Koene, B., Kokkinias, P., Kopf, M., Korcyl, K., Korytov, Av, Kostioukhine, V., Kourkoumelis, C., Kouznetsov, O., Kramer, Ph, Krolikowski, J., Kronkvist, I., Krstic, J., Krueneimarquis, U., Krupinski, W., Kulka, K., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, Jw, Lanceri, L., Lapin, V., Laugier, Jp, Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Levy, Jm, Lieb, E., Liko, D., Lillethun, E., Lindgren, J., Lindner, R., Lipniacka, A., Lippi, I., Loerstad, B., Lokajicek, M., Loken, Jg, Lopezfernandez, A., Aguera, Mal, Los, M., Loukas, D., Lozano, Jj, Lutz, P., Lyons, L., Maehlum, G., Maillard, I., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, Jc, Markou, A., Maron, T., Marti, S., Mathis, L., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Meola, G., Meroni, C., Meyer, Wt, Michelotto, M., Mikulec, I., Mitaroff, Wa, Mitselmakher, Gv, Mjoernmark, U., Moa, T., Moeller, R., Moenig, K., MONGE, MR, Morettini, P., Mueller, H., Murray, Wj, Muryn, B., Myatt, G., Naraghi, F., Navarria, Fl, Negri, P., Nielsen, Bs, Nijjhar, B., Nikolaenko, V., Nilsen, Pes, Niss, P., Obraztsov, V., Olshevski, Ag, Orava, R., Ostankov, A., Osterberg, K., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, Td, Pape, L., Passeri, A., Pegoraro, M., Pennanen, J., Perevozchikov, V., Pernicka, M., Perrotta, A., Petrolini, A., Pettersen, Te, Pierre, F., Pimenta, M., Pingot, O., Pol, Me, Polok, G., Poropat, P., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Ratoff, Pn, Read, Al, Redaelli, Ng, Regler, M., Reid, D., Renton, Pb, Resvanis, Lk, Richard, F., Richardson, M., Ridky, J., Rinaudo, G., Roditi, I., Romero, A., Roncagliolo, I., Ronchese, P., Ronnqvist, C., Rosenberg, Ei, Rossi, S., Rossi, U., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmann, V., Ruiz, A., Rybicki, K., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, J., Sannino, M., Schael, S., Schneider, H., Schyns, Mae, Sciolla, G., Scuri, F., Segar, Am, Sekulin, R., Sessa, M., Sette, G., Seufert, R., Shellard, Rc, Siccama, I., Siegrist, P., Simonetti, S., Simonetto, F., Sisakian, An, Skaali, Tb, Skjevling, G., Smadja, G., Smith, Gr, Sosnowski, R., Spassoff, Ts, Spiriti, E., Squarcia, S., Staeck, H., Stanescu, C., Stapnes, S., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Straver, J., Strub, R., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tavernier, S., Tchikilev, O., Theodosiou, Ge, Tilquin, A., Timmermans, J., Timofeev, Vg, Tkatchev, Lg, Todorov, T., Toet, Dz, Toker, O., Torassa, E., Tortora, L., Trainor, Mt, Treille, D., Trevisan, U., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, En, Turala, M., Turluer, Ml, Tuuva, T., Tyapkin, Ia, Tyndel, M., Tzamarias, S., Ueberschaer, S., Ullaland, O., Uvarov, V., Valenti, G., Vallazza, E., Ferrer, Jav, Vandervelde, C., Vanapeldoorn, Gw, Vandam, P., Vandoninck, Wk, Varela, J., Pedro Vaz, Vegni, G., Ventura, L., Venus, W., Verbeure, F., Vertogradov, Ls, Vilanova, D., Vitale, L., Vlasov, E., Vodopyanov, As, Vollmer, M., Volponi, S., Voulgaris, G., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wayne, M., Wehr, A., Weierstall, M., Weilhammer, P., Werner, J., Wetherell, Am, Wickens, Jh, Wikne, J., Wilkinson, Gr, Williams, Wsc, Winter, M., Wormald, D., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zhang, G., Zimin, Ni, Zito, M., Zuberi, R., Funchal, Rz, Zumerle, G., Zuniga, J., Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), DELPHI, Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)
Subjects: Quark, COLLISIONS, Particle physics, E+E ANNIHILATION, Physics and Astronomy (miscellaneous), LUND MONTE-CARLO, Astrophysics::High Energy Astrophysical Phenomena, Hadron, PETRA ENERGIES, INTERVALS, 01 natural sciences, 250 GEV/C, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Rapidity, 010306 general physics, Parton shower, RAPIDITY DEPENDENCE, Engineering (miscellaneous), Physics, 010308 nuclear & particles physics, QUARK, Multiplicity (mathematics), GLUON JETS, Charged particle, Gluon, FRAGMENTATION, Physique des particules élémentaires, High Energy Physics::Experiment, Particle Physics - Experiment, Color charge
Abstract: The multiplicity distributions of charged particles in full phase space and in restricted rapidity intervals for events with a fixed number of jets measured by the DELPHI detector are presented. The data are well reproduced by the Lund Parton Shower model and can also be well described by fitted negative binomial distributions. The properties of these distributions in terms of the clan model are discussed. In symmetric 3-jet events the candidate gluon jet is found not to be significantly different in average multiplicity than the mean of the other two jets, thus supporting previous results of the HRS and OPAL experiments. Similar results hold for events generated according to the LUND PS and to the HERWIG models, when the jets are defined by the JADE jet finding algorithm. The method seems to be insensitive for measuring the color charge ratio between gluons and quarks. © 1992 Springer-Verlag., 0, SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 1992
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2. FIRST EVIDENCE OF HARD SCATTERING PROCESSES IN SINGLE TAGGED GAMMA-GAMMA-COLLISIONS

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALMEIDA, FML ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANDRIEUX, ML and ANTILOGUS, P APEL, WD ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BAUDOT, J BECKS, KH BEGALLI, M and BEILLIERE, P BELTRAN, P BENVENUTI, AC BERGGREN, M and BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P and BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN and BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL and BORISOV, G BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O and BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M and BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H and BRICMAN, C BRILLAULT, L BROWN, RCA BRUNET, JM BUGGE, L BURAN, T BUYS, A CACCIA, M CALVI, M CAMACHOROZAS, AJ CAMPORESI, T CANALE, V CANEPA, M CANKOCAK, K CAO, F CARENA, F CARRILHO, P CARROLL, L CASO, C CASSIO, V and CASTILLOGIMENEZ, MV CATTAI, A CAVALLO, FR CERRITO, L and CHABAUD, V CHAN, A CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM CINDRO, V COLLINS, P CONTRERAS, JL and CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB and CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S and DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G and DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DASILVA, W and DEFOIX, C DELPIERRE, P DEMARIA, N DEANGELIS, A and DEBOECK, H DEBOER, W DEBRABANDERE, S DECLERCQ, C and DEFEZLASO, MDM DELAVAISSIERE, C DELOTTO, B DEMIN, A and DEPAULA, L DESAINTJEAN, C DIJKSTRA, H DICIACCIO, L and DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M and DREES, J DRIS, M DUFOUR, Y DUPONT, F EDSALL, D and EHRET, R EKELOF, T EKSPONG, G ELSING, M ENGEL, JP and ERSHAIDAT, N SANTO, ME FASSOULIOTIS, D FEINDT, M FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORMENTI, F FOUSSET, JL FRANEK, B and FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R and FULDAQUENZER, F FURSTENAU, H FUSTER, J GAMBA, D and GANDELMAN, M GARCIA, C GARCIA, J GASPAR, C GASPARINI, U and GAVILLET, P GAZIS, EN GELE, D GERBER, JP GILLESPIE, D GOKIELI, R GOLOB, B GOLOVATYUK, VM CADENAS, JJGY and GOPAL, G GORN, L GORSKI, M GRACCO, V GRARD, F and GRAZIANI, E GROSDIDIER, G GUNNARSSON, P GUY, J and HAEDINGER, U HAHN, F HAHN, M HAHN, S HAIDER, S and HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K HAO, W and HARRIS, FJ HEDBERG, V HENRIQUES, R HERNANDEZ, JJ and HERNANDO, JA HERQUET, P HERR, H HESSING, TL HIGON, E and HILKE, HJ HILL, TS HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D and HONORE, PF HOULDEN, M HRUBEC, J HUET, K HULTQVIST, K and IOANNOU, P IVERSEN, PS JACKSON, JN JACOBSSON, R and JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JONSSON, L JUILLOT, P KAISER, M KALMUS, G and KAPUSTA, F KARLSSON, M KARVELAS, E KATARGIN, A and KATSANEVAS, S KATSOUFIS, EC KERANEN, R KHOMENKO, BA and KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A and KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P and KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIOUKHINE, V and KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KREUTER, C and KROLIKOWSKI, J KRONKVIST, I KRUPINSKI, W KULKA, K and KURVINEN, K LACASTA, C LAKTINEH, I LAMBROPOULOS, C and LAMSA, JW LANCERI, L LANGEFELD, P LAPIN, V LAST, I and LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LESIAK, T LEVY, JM LIEB, E LIKO, D LINDNER, R and LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG and LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D and LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J and MAIO, A MALTEZOS, A MANDL, F MARCO, J MARECHAL, B and MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A MARON, T and MARTI, S MARTINEZRIVERO, C MARTINEZVIDAL, F MATORRAS, F and MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C MEYER, WT MIAGKOV, A and MICHELOTTO, M MIGLIORE, E MIKULEC, I MIRABITO, L and MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL and NAVAS, S NEGRI, P NEMECEK, S NEUMANN, W NEUMEISTER, N NICOLAIDOU, R NIELSEN, BS NIKOLAENKO, V NISS, P and NOMEROTSKI, A NORMAND, A OBRAZTSOV, V OLSHEVSKI, AG and ORAVA, R OSTERBERG, K OURAOU, A PAGANINI, P PAGANONI, M and PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F and PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L and PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C and PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F PIMENTA, M and PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G and POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P PULLIA, A and RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REALE, M REBECCHI, P RADAELLI, NG and REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F and RICHARDSON, J RIDKY, J RINAUDO, G RIPP, I ROMERO, A and RONCAGLIOLO, I RONCHESE, P ROOS, L ROSENBERG, EI ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V and RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G and SALT, J SANCHEZ, J SANNINO, M SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A SEKULIN, R SESSA, M SEUFERT, R SHELLARD, RC SICCAMA, I and SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN and SKAALI, TB SMADJA, G SMIRNOVA, O SMITH, GR SOKOLOV, A and SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T SPIRITI, E and SCUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVITSKI, I STAVROPOULOS, G STEPANIAK, K STICHELBAUT, F STOCCHI, A and STRAUSS, J STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M TABARELLI, T TCHIKILEV, O THEODOSIOU, GE and THOME, Z TILQUIN, A TIMMERMANS, J TIMOFEEV, VG and TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TOME, B and TORASSA, E TORTORA, L TRANSTROMER, G TREILLE, D and TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T TYAPKIN, IA and TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDONINCK, WK and VANELDIK, J VEGNI, G VENTURA, L VENUS, W VERBEURE, F and VERLATO, M VERTOGRADOV, LS VILANOVA, D VINCENT, P and VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M and VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F and WEHR, A WEIERSTALL, M WEILHAMMER, P WETHERELL, AM and WICKENS, JH WIELERS, M WILKINSON, GR WILLIAMS, WSC and WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YIP, K and YUSHCHENKO, O ZACH, F ZAITSEV, A ZALEWSKA, A ZALEWSKI, P and ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI ZITO, M and ZONTAR, D ZUBERI, R ZUCCHELLI, GC ZUMERLE, G
Subjects: High Energy Physics::Lattice, High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: For the first time, multihadronic production from single tagged gamma gamma collisions has been studied, where one of the scattered leptons was tagged at very low virtual photon absolute mass squared ([Q(2)] = 0.06 (GeV/c(2))(2)). Data collected during 1991 and 1992 in the DELPHI experiment at LEP are shown to agree well with predictions which included the non-perturbative vector meson dominance model in which the interacting photons are assumed to have converted into a vector meson (rho, omega or pi), a quark-parton model which describes direct photon interactions and a QCD-based model which considers the photon to have quark and gluon structure functions. Five different parametrizations of these structure functions were used and the predictions compared with the data. This study confirms recent results from no-tag experiments in requiring a QCD-based component to successfully describe the data, indicating that the photon has a significant partonic content.
Published: 1995

3. A study of radiative muon-pair events at Z(0) energies and limits on an additional Z' gauge boson

Author: Abreu, P, Adam, W, Adye, T, Agasi, E, Ajinenko, L, Aleksan, R, Alekseev, Gd, Allport, Pp, Almehed, S, Almeida, Fml, Alvsvaag, Sj, Amaldi, U, Andreazza, A, Antilogus, P, Apel, Wd, Apsimon, Rj, Arnoud, Y, Asman, B, Augustin, Je, Augustinus, A, Baillon, P, Bambade, P, Barao, F, Barate, R, Bardin, Dy, Barker, Gj, Baroncelli, A, Barring, O, Barrio, Ja, Bartl, W, Bates, Mj, Battaglia, M, Baubillier, M, Baudot, J, Becks, Kh, Begalli, M, Beilliere, P, Beltran, P, Benvenuti, Ac, Berggren, M, Bertrand, D, Bianchi, F, Bigi, M, Bilenky, Ms, Billoir, P, Bjarne, J, Bloch, D, Blocki, J, Blyth, S, Bocci, V, Bogolubov, Pn, Bolognese, T, Bonesini, M, Bonivento, W, Booth, Psl, Borisov, G, Bosio, C, Bostjancic, B, Bosworth, S, Botner, O, Boudinov, E, Bouquet, B, Bourdarios, C, Bowcock, Tjv, Bozzo, M, Braibant, S, Branchini, P, Brand, Kd, Brenner, Ra, Briand, H, Bricman, C, Brillault, L, Brown, Rca, Brunet, Jm, Bugge, L, Buran, T, Buys, A, Buytaert, Jama, Caccia, Massimo, Calvi, M, Rozas, Ajc, Campion, R, Camporesi, T, Canale, V, Cankocak, K, Cao, F, Carena, F, Carrilho, P, Carroll, L, Cases, R, Caso, C, Gimenez, Mvc, Cattai, A, Cavallo, Fr, Cerrito, L, Chabaud, V, Chan, A, Chapkin, M, Charpentier, P, Chaussard, L, Chauveau, J, Checchia, P, Chelkov, Ga, Chliapnikov, P, Chorowicz, V, Chrin, Jtm, Cindro, V, Collins, P, Contreras, Jl, Contri, R, Cortina, E, Cosme, G, Cosmo, G, Cossutti, C, Couchot, F, Crawley, Hb, Crennell, D, Crosetti, G, Maestro, Jc, Czellar, S, Dahljensen, E, Dahm, J, Dalmagne, B, Dam, M, Damgaard, G, Daubie, E, Daum, A, Dauncey, Pd, Davenport, M, Davies, J, Dasilva, W, Defoix, C, Delpierre, P, Demaria, N, Deangelis, A, Deboeck, H, Deboer, W, Debrabandere, S, Declercq, C, Laso, Mdmf, Delavaissiere, C, Delotto, B, Demin, A, Depaula, L, Desaintjean, C, Dijkstra, H, Diciaccio, L, Djama, F, Dolbeau, J, Donszelmann, M, Doroba, K, Dracos, M, Dress, J, Dris, M, Dufour, Y, Dupont, F, Edsall, D, Ehret, R, Ekelof, T, Ekspong, G, Elsing, M, Engel, Jp, Ershaidat, N, Santo, Me, Fassouliotis, D, Feindt, M, Fenyuk, A, Ferrer, A, Filippas, Ta, Firestone, A, Foeth, H, Fokitis, E, Fontanelli, F, Formenti, F, Fousset, Jl, Franek, B, Frenkiel, P, Fries, Dc, Frodesen, Ag, Fruhwirth, R, Fuldaquenzer, F, Furstenau, H, Fuster, J, Gamba, D, Gandelman, M, Garcia, C, Garcia, J, Gaspar, C, Gasparini, U, Gavillet, P, Gazis, En, Gele, D, Gerber, Jp, Giacomelli, P, Gillespie, D, Gokieli, R, Golob, B, Golovatyuk, Vm, Gomez, Jj, Cadenas, Y, Gopal, G, Gorn, L, Gorski, M, Gracco, V, Grard, F, Graziani, E, Grosdidier, G, Gunnarsson, P, Guy, J, Haedinger, U, Hahn, F, Hahn, M, Hahn, S, Haider, S, Hajduk, Z, Hakansson, A, Hallgren, A, Hamacher, K, Hao, W, Harris, Fj, Hedberg, V, Henriques, R, Hermandez, Jj, Hernando, Ja, Herquet, P, Herr, H, Hessing, Tl, Higon, E, Hilke, Hj, Hill, Ts, Holmgren, So, Holt, Pj, Holthuizen, D, Honore, Pf, Houlden, M, Hrubec, J, Huet, K, Hultqvist, K, Ioanou, P, Iversen, Ps, Jackson, Jn, Jacobsson, R, Jalocha, P, Jarlskog, G, Jarry, P, Jeanmarie, B, Johansson, Ek, Jonker, M, Jonsson, L, Juillot, P, Kaiser, M, Kalmus, G, Kapusta, F, Karlsson, M, Karvelas, E, Katsanevas, S, Katsoufis, Ec, Keranen, R, Khomenko, Ba, Khovanski, Nn, King, B, Kjaer, Nj, Klein, H, Klovning, A, Kluit, P, Kochmehrin, A, Koehne, Jh, Koene, B, Kokkinias, P, Koratzinos, M, Korcyl, K, Korytov, Av, Kostioukhine, V, Kourkoumelis, C, Kouznetsov, O, Kramer, Ph, Krammer, M, Kreuter, C, Krolikowski, J, Kronkvist, I, Krupinski, W, Kulka, K, Kurvinen, K, Lacasta, C, Laktineh, I, Lambropoulos, C, Lamsa, Jw, Lanceri, L, Langefeld, P, Lapin, V, Last, I, Laugier, Jp, Lauhakangas, R, Leder, G, Ledroit, F, Leitner, R, Lemoigne, Y, Lemonne, J, Lenzen, G, Lepeltier, V, Lesiak, T, Levy, Jm, Lieb, E, Liko, D, Lindner, R, Lipniacka, A, Lippi, I, Loerstad, B, Lokajicek, M, Loken, Jg, Lopezfernandez, A, Lopezaguera, Ma, Los, M, Loukas, D, Lozano, Jj, Lutz, P, Lyons, L, Maehlum, G, Maillard, J, Maio, A, Maltezos, A, Mandl, F, Marco, J, Marechal, B, Margoni, M, Marin, Jc, Mariotti, C, Markou, A, Maron, T, Marti, S, Martinezrivero, C, Martinezvidal, F, Matorras, F, Matteuzzi, C, Matthiae, G, Mazzucato, M, Cubbin, Mm, Kay, Rm, Nulty, Rm, Medbo, J, Meroni, C, Meyer, Wt, Michelotto, M, Migliore, E, Mikulec, I, Mirabito, L, Mitaroff, Wa, Mitselmakher, Gv, Mjoernmark, U, Moa, T, Moeller, R, Moenig, K, Monge, Mr, Morettini, P, Mueller, H, Murray, Wj, Muryn, B, Myatt, G, Naraghi, F, Navarria, Fl, Negri, P, Nemecek, S, Neumann, W, Nicolaidou, R, Nielsen, Bs, Niss, P, Nomerotski, A, Normand, A, Obraztsov, V, Olshevski, Af, Orava, R, Osterberg, K, Ouraou, A, Paganini, P, Paganoni, M, Pain, R, Palka, H, Papadopoulou, Td, Pape, L, Parodi, F, Passeri, A, Pegoraro, M, Pennanen, J, Peralta, L, Pernegger, H, Pernicka, M, Perrota, A, Petridou, C, Petrolini, A, Phillips, Ht, Piana, G, Pierre, F, Pimenta, M, Plaszczynski, S, Podobrin, O, Pol, Me, Polok, G, Poropat, P, Pozdniakov, V, Prest, Michela, Privitera, P, Pullia, A, Radojicic, D, Ragazzi, S, Rahmani, H, Rames, J, Ratoff, Pn, Read, Al, Reale, M, Rebecchi, P, Redaelli, Ng, Regler, M, Reid, D, Renton, Pb, Resvanis, Lk, Richard, F, Richardson, J, Ridky, J, Rinaudo, G, Ripp, I, Romero, A, Roncagliolo, I, Ronchese, P, Roos, L, Rosenberg, Ei, Rosso, E, Roudeau, P, Rovelli, T, Ruckstuhl, W, Ruhlmannkleider, V, Ruiz, A, Rybicki, K, Saarikko, H, Sacquin, Y, Sajot, G, Salt, J, Sanchez, J, Sannino, M, Schael, S, Schneider, H, Schyns, Mae, Sciolla, G, Scuri, F, Segar, Am, Seitz, A, Sekulin, R, Seufert, R, Shellard, Rc, Siccama, I, Siegrist, P, Simonetti, S, Simonetto, F, Sisakian, An, Skaali, Tb, Smadja, G, Smirnov, N, Smirnova, O, Smith, Gr, Sosnowski, R, Souzasantos, D, Spassov, T, Spiriti, E, Squarcia, S, Staeck, H, Stanescu, C, Stapnes, S, Stavitski, I, Stavropoulos, G, Stepaniak, K, Stichelbaut, F, Stocchi, A, Strauss, J, Straver, J, Strub, R, Stugu, B, Szczekowski, M, Szeptycka, M, Tabarelli, T, Tchikilev, O, Theodosiou, Ge, Thome, Z, Tilquin, A, Timmermans, J, Timofeev, Vg, Tkatchev, Lg, Todorov, T, Toet, Dz, Tomaradze, A, Tome, B, Torassa, E, Tortora, L, Transtromer, G, Treille, D, Trischuk, W, Tristram, G, Troncon, C, Tsirou, A, Tsyganov, En, Turala, M, Turluer, Ml, Tuuva, T, Tyapkin, Ia, Tyndel, M, Tzamarias, S, Ueberschaer, B, Ueberschaer, S, Ullaland, O, Uvarov, V, Valenti, G, Vallazza, E, Ferrer, Jav, Velde, Cv, Vanapeldoorn, Gw, Vandam, P, Vanderheijden, M, Vandoninck, Wk, Vaneldik, J, Vaz, P, Vegni, G, Ventura, L, Venus, W, Verbeure, F, Verlato, M, Vertogradov, Ls, Vilanova, D, Vincent, P, Vitale, L, Vlasov, E, Vodopyanov, As, Vollmer, M, Voutilainen, M, Wahlen, H, Walck, C, Wehr, A, Weierstall, M, Weilhammer, P, Wetherell, Am, Wickens, Jh, Wielers, M, Wilkinson, Gr, Williams, Wsc, Winter, M, Witek, M, Wormser, G, Woschnagg, K, Yip, K, Yushchenko, O, Zach, F, Zaitsev, A, Zalewska, A, Zalewski, P, Zavrtanik, D, Zevgolatakos, E, Zimin, Ni, Zito, M, Zontar, D, Zuberi, R, and Zumerle, G.
Subjects: radiative photon, muon pair cross section, DELPHI
Published: 1995

4. First evidence of hard scattering processes in single tagged $\gamma\gamma$ collisions

Author: Abreu, P., Adam, W., Adye, T., Agasi, E., Ajinenko, I., Aleksan, R., Alekseev, G., Allport, P., Almehed, S., Almeida, F., Alvsvaag, S., Amaldi, U., Andreazza, A., Andrieux, M., Antilogus, P., Apel, W., Arnoud, Y., Asman, B., Augustin, J., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, D., Barker, G., Baroncelli, A., Barring, O., Barrio, J., Bartl, W., Bates, M., Battaglia, M., Baubillier, M., Baudot, J., Becks, K., Begalli, M., Beilliere, P., Beltran, P., Benvenuti, A., Berggren, M., Bertrand, D., Bianchi, F., Bigi, M., Bilenky, M., Billoir, P., Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolubov, P., Bolognese, T., Bonesini, M., Bonivento, W., Booth, P., Borisov, G., Bosio, C., Bostjancic, B., Bosworth, S., Botner, O., Bouquet, B., Bourdarios, C., Bowcock, T., Bozzo, Marco, Braibant, S., Branchini, P., Brand, K., Brenner, R., Briand, H., Bricman, C., Brillault, L., Brown, R., Brunet, J., Bugge, L., Buran, T., Buys, A., Caccia, M., Calvi, M., Camachorozas, A., Camporesi, T., Canale, V., Canepa, M., Cankocak, K., Cao, F., Carena, F., Carrilho, P., Carroll, L., Caso, C., Cassio, V., Castillogimenez, M., Cattai, A., Cavallo, F., Cerrito, L., Chabaud, V., Chan, A., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, G., Chliapnikov, P., Chorowicz, V., Chrin, J., Cindro, V., Collins, P., Contreras, J., Contri, R., Cortina, E., Cosme, G., Couchot, F., Crawley, H., Crennell, D., Crosetti, G., Maestro, J., Czellar, S., Dahljensen, E., Dahm, J., Dalmagne, B., Dam, M., Damgaard, G., Daubie, E., Daum, A., Dauncey, P., Davenport, M., Dasilva, W., Defoix, C., Delpierre, P., Demaria, N., Deangelis, A., Deboeck, H., Deboer, W., Debrabandere, S., Declercq, C., Defezlaso, M., Delavaissiere, C., Delotto, B., Demin, A., Depaula, L., Desaintjean, C., Dijkstra, H., Diciaccio, L., Djama, F., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Dupont, F., Edsall, D., Ehret, R., Ekelof, T., Ekspong, G., Elsing, M., Engel, J., Ershaidat, N., Santo, M., Fassouliotis, D., Feindt, M., Ferrer, A., Filippas, T., Firestone, A., Foeth, H., Fokitis, E., Fontanelli, Flavio, Formenti, F., Fousset, J., Franek, B., Frenkiel, P., Fries, D., Frodesen, A., Fruhwirth, R., Fuldaquenzer, F., Furstenau, H., Fuster, J., Gamba, D., Gandelman, M., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, E., Gele, D., Gerber, J., Gillespie, D., Gokieli, R., Golob, B., Golovatyuk, V., Cadenas, J., Gopal, G., Gorn, L., Gorski, M., Gracco, V., Grard, F., Graziani, E., Grosdidier, G., Gunnarsson, P., Guy, J., Haedinger, U., Hahn, F., Hahn, M., Hahn, S., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., Hao, W., Harris, F., Hedberg, V., Henriques, R., Hernandez, J., Hernando, J., Herquet, P., Herr, H., Hessing, T., Higon, E., Hilke, H., Hill, T., Holmgren, S., Holt, P., Holthuizen, D., Honore, P., Houlden, M., Hrubec, J., Huet, K., Hultqvist, K., Ioannou, P., Iversen, P., Jackson, J., Jacobsson, R., Jalocha, P., Jarlskog, G., Jarry, P., Jeanmarie, B., Johansson, E., Jonsson, L., Juillot, P., Kaiser, M., Kalmus, G., Kapusta, F., Karlsson, M., Karvelas, E., Katargin, A., Katsanevas, S., Katsoufis, E., Keranen, R., Khomenko, B., Khovanski, N., King, B., Kjaer, N., Klein, H., Klovning, A., Kluit, P., Kochmehrin, A., Koehne, J., Koene, B., Kokkinias, P., Koratzinos, M., Korcyl, K., Korytov, A., Kostioukhine, V., Kourkoumelis, C., Kouznetsov, O., Kramer, P., Kreuter, C., Krolikowski, J., Kronkvist, I., Krupinski, W., Kulka, K., Kurvinen, K., Lacasta, C., Laktineh, I., Lambropoulos, C., Lamsa, J., Lanceri, L., Langefeld, P., Lapin, V., Last, I., Laugier, J., Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Lesiak, T., Levy, J., Lieb, E., Liko, D., Lindner, R., Lipniacka, A., Lippi, I., Loerstad, B., Lokajicek, M., Loken, J., Lopezfernandez, A., Aguera, M., Los, M., Loukas, D., Lozano, J., Lutz, P., Lyons, L., Maehlum, G., Maillard, J., Maio, A., Maltezos, A., Mandl, F., Marco, J., Marechal, B., Margoni, M., Marin, J., Mariotti, C., Markou, A., Maron, T., Marti, S., Martinezrivero, C., Martinezvidal, F., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Medbo, J., Meroni, C., Meyer, W., Miagkov, A., Michelotto, M., Migliore, E., Mikulec, I., Mirabito, L., Mitaroff, W., Mitselmakher, G., Mjoernmark, U., Moa, T., Moeller, R., Moenig, K., Monge, MARIA ROBERTA, Morettini, P., Mueller, H., Murray, W., Muryn, B., Myatt, G., Naraghi, F., Navarria, F., Navas, S., Negri, P., Nemecek, S., Neumann, W., Neumeister, N., Nicolaidou, R., Nielsen, B., Nikolaenko, V., Niss, P., Nomerotski, A., Normand, A., Obraztsov, V., Olshevski, A., Orava, R., Osterberg, K., Ouraou, A., Paganini, P., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T., Pape, L., Parodi, Fabrizio, Passeri, A., Pegoraro, M., Pennanen, J., Peralta, L., Pernegger, H., Pernicka, M., Perrotta, A., Petridou, C., Petrolini, Alessandro, Phillips, H., Piana, G., Pierre, F., Pimenta, M., Plaszczynski, S., Podobrin, O., Pol, M., Polok, G., Poropat, P., Pozdniakov, V., Prest, M., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Rahmani, H., Rames, J., Ratoff, P., Read, A., Reale, M., Rebecchi, P., Radaelli, N., Regler, M., Reid, D., Renton, P., Resvanis, L., Richard, F., Richardson, J., Ridky, J., Rinaudo, G., Ripp, I., Romero, A., Roncagliolo, I., Ronchese, P., Roos, L., Rosenberg, E., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmannkleider, V., Ruiz, A., Rybicki, K., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, J., Sannino, M., Schneider, H., Schyns, M., Sciolla, G., Scuri, F., Segar, A., Seitz, A., Sekulin, R., Sessa, M., Seufert, R., Shellard, R., Siccama, I., Siegrist, P., Simonetti, S., Simonetto, F., Sisakian, A., Skaali, T., Smadja, G., Smirnova, O., Smith, G., Sokolov, A., Sosnowski, R., Souzasantos, D., Spassov, T., Spiriti, E., Scuarcia, S., Staeck, H., Stanescu, C., Stapnes, S., Stavitski, I., Stavropoulos, G., Stepaniak, K., Stichelbaut, F., Stocchi, A., Strauss, J., Straver, J., Strub, R., Stugu, B., Szczekowski, M., Szeptycka, M., Tabarelli, T., Tchikilev, O., Theodosiou, G., Thome, Z., Tilquin, A., Timmermans, J., Timofeev, V., Tkatchev, L., Todorov, T., Toet, D., Tomaradze, A., Tome, B., Torassa, E., Tortora, L., Transtromer, G., Treille, D., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E., Turala, M., Turluer, M., Tuuva, T., Tyapkin, I., Tyndel, M., Tzamarias, S., Ueberschaer, B., Ueberschaer, S., Ullaland, O., Uvarov, V., Valenti, G., Vallazza, E., Ferrer, J., Vandervelde, C., Vanapeldoorn, G., Vandam, P., Vandoninck, W., Vaneldik, J., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Verlato, M., Vertogradov, L., Vilanova, D., Vincent, P., Vitale, L., Vlasov, E., Vodopyanov, A., Vollmer, M., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wehr, A., Weierstall, M., Weilhammer, P., Wetherell, A., Wickens, J., Wielers, M., Wilkinson, G., Williams, W., Winter, M., Witek, M., Wormser, G., Woschnagg, K., Yip, K., Yushchenko, O., Zach, F., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zimin, N., Zito, M., Zontar, D., Zuberi, R., Zucchelli, G., Zumerle, G., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), DELPHI, Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)
Subjects: DELPHI, photon structure function, QCD, High Energy Physics::Lattice, HADRONS, High Energy Physics::Phenomenology, LEP, Q2, PHOTON STRUCTURE-FUNCTION, CROSS-SECTION, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: For the first time, multihadronic production from single tagged γγ collisions has been studied, where one of the scattered leptons was tagged at very low virtual photon absolute mass squared (〈Q2〉 = 0.06 (GeV/c2)2). Data collected during 1991 and 1992 in the DELPHI experiment at LEP are shown to agree well with predictions which included the non-perturbative vector meson dominance model in which the interacting photons are assumed to have converted into a vector meson (ρ{variant}, ω or π), a quark-parton model which describes direct photon interactions and a QCD-based model which considers the photon to have quark and gluon structure functions. Five different parametrizations of these structure functions were used and the predictions compared with the data. This study confirms recent results from no-tag experiments in requiring a QCD-based component to successfully describe the data, indicating that the photon has a significant partonic content. © 1995.
Published: 1994
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5. SEARCH FOR PAIR-PRODUCED HEAVY SCALARS IN Z(0) DECAYS

Author: Abreu, P., Adam, W., Adye, T., Agasi, E., Ajninenko, Ik, Aleksan, R., Alekseev, Gd, Allport, Pp, Almehed, S., Almeida, Fml, Alvsvaag, Sj, Amaldi, U., Andreazza, A., Antilogus, P., Apel, Wd, Apsimon, Rj, Arnoud, Y., Asman, B., Augustin, Je, Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Bardin, Dy, Barker, Gj, Baroncelli, A., Barring, O., Barrio, Ja, Bartl, W., Bates, Mj, Battaglia, M., Baubillier, M., Becks, Kh, Begalli, M., Beilliere, P., Beltran, P., Benvenuti, Ac, Berggren, M., Bertrand, D., Bianchi, F., Bigi, M., Bilenky, Ms, Billoir, P., Bjarne, J., Bloch, D., Blocki, J., Blyth, S., Bocci, V., Bogolubov, Pn, Bolognese, T., Bonesini, M., Bonivento, W., Booth, Psl, Borisov, G., Bosio, C., Bostjancic, B., Bosworth, S., Botner, O., Bouquet, B., Bourdarios, C., Bowcock, Tjv, Bozzo, M., Braibant, S., Branchini, P., Brand, Kd, Brenner, Ra, Briand, H., Bricman, C., Brillault, L., Brown, Rca, Bruckman, P., Brunet, Jm, Bugge, L., Buran, T., Buys, A., Buytaert, Jama, Caccia, M., Calvi, M., Rozas, Ajc, Campion, R., Camporesi, T., Canale, V., KEREM CANKOÇAK, Cao, F., Carena, F., Carrilho, P., Carroll, L., Cases, R., Caso, C., Castelli, E., Gimenez, Mvc, Cattai, A., Cavallo, Fr, Cerrito, L., Chabaud, V., Chan, A., Chapkin, M., Charpentier, P., Chauveau, J., Checchia, P., Chelkov, Ga, Chevalier, L., Chliapnikov, P., Chorowicz, V., Chrin, Jtm, Cindro, V., Collins, P., Contreras, Jl, Contri, R., Cortina, E., Cosme, G., Cosmo, G., Couchot, F., Crawley, Hb, Crennell, D., Crosetti, G., Maestro, Jc, Czellar, S., Dahljensen, E., Dahm, J., Dalmagne, B., Dam, M., Damgaard, G., Daubie, E., Daum, A., Dauncey, Pd, Davenport, M., Davies, J., Dasilva, W., Defoix, C., Delpierre, P., Demaria, N., Deangelis, A., Deboeck, H., Deboer, W., Debrabandere, S., Declercq, C., Laso, Mdmd, Delavaissiere, C., Delotto, B., Demin, A., Depaula, L., Dijkstra, H., Diciaccio, L., Djama, F., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Dupont, F., Edsall, D., Ehret, R., Ekelof, T., Ekspong, G., Elsing, M., Engel, Jp, Ershaidat, N., Santo, Me, Falaleev, V., Fassouliotis, D., Feindt, M., Fenyuk, A., Ferrer, A., Filippas, Ta, Firestone, A., Foeth, H., Fokitis, E., Fontanelli, F., Formenti, F., Fousset, Jl, Francon, S., Franek, B., Frenkiel, P., Fries, Dc, Frodesen, Ag, Fruhwirth, R., Fuldaquenzer, F., Furstenau, H., Fuster, J., Gamba, D., Gandelman, M., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, En, Gele, D., Gerber, Jp, Giacomelli, P., Gillespie, D., Gokieli, R., Golob, B., Golovatyuk, Vm, Cadenas, Jjgy, Gopal, G., Gorn, L., Gorski, M., Gracco, V., Grard, F., Graziani, E., Grosdidier, G., Gunnarsson, P., Guy, J., Haedinger, U., Hahn, F., Hahn, M., Hahn, S., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., Demonchenault, Gh, Hao, W., Harris, Fj, Hedberg, V., Henriques, R., Hernandez, Jj, Hernando, Ja, Herquet, P., Herr, H., Hessing, Tl, Higon, E., Hilke, Hj, Hill, Ts, Holmgren, So, Holt, Pj, Holthuizen, D., Honore, Pf, Houlden, M., Hrubec, J., Huet, K., Hultqvist, K., Ioannou, P., Iversen, Ps, Jackson, Jn, Jacobsson, R., Jalocha, P., Jarlskog, G., Jarry, P., Jeanmarie, B., Johansson, Ek, Jonker, M., Jonsson, L., Juillot, P., Kaiser, M., Kalmus, G., Kapusta, F., Karlsson, M., Karvelas, E., Katsanevas, S., Katsoufis, Ec, Keranen, R., Khomenko, Ba, Khovanski, Nn, King, B., Kjaer, Nj, Klein, H., Klovning, A., Kluit, P., Kochmehrin, A., Koehne, Jh, Koene, B., Kokkinias, P., Koratzinos, M., Korytov, Av, Kostioukhine, V., Kourkoumelis, C., Kouznetsov, O., Kramer, Ph, Krammer, M., Kreuter, C., Krolikowski, J., Kronkvist, I., Krupinski, W., Kucewicz, W., Kulka, K., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, Jw, Lanceri, L., Langefeld, P., Lapin, V., Last, I., Laugier, Jp, Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Lesiak, T., Levy, Jm, Lieb, E., Liko, D., Lindner, R., Lipniacka, A., Lippi, I., Loerstad, B., Lokajicek, M., Loken, Jg, Lopezfernandez, A., Aguera, Mal, Los, M., Loukas, D., Lozano, Jj, Lutz, P., Lyons, L., Maehlum, G., Maillard, J., Maio, A., Maltezos, A., Mandl, F., Marco, J., Marechal, B., Margoni, M., Marin, Jc, Mariotti, C., Markou, A., Maron, T., Marti, S., Martinezrivero, C., Martinezvidal, F., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Medbo, J., Meroni, C., Meyer, Wt, Michelotto, M., Migliore, E., Mikulec, I., Mirabito, L., Mitaroff, Wa, Mitselmakher, Gv, Mjoernmark, U., Moa, T., Moeller, R., Moenig, K., MONGE, MR, Morettini, P., Mueller, H., Murray, Wj, Muryn, B., Myatt, G., Naraghi, F., Navarria, Fl, Negri, P., Nemecek, S., Neumann, W., Neumeister, N., Nicolaidou, R., Nielsen, Bs, Nilsen, Pes, Niss, P., Nomerotski, A., Normand, A., Novak, M., Obraztsov, V., Olshevski, Ag, Orava, R., Osterberg, K., Ouraou, A., Paganini, P., Paganoni, M., Pain, R., Palka, H., Papadopoulou, Td, Pape, L., Parodi, F., Passeri, A., Pegoraro, M., Pennanen, J., Peralta, L., Pernicka, M., Perrotta, A., Petridou, C., Petrolini, A., Phillips, Ht, Piana, G., Pierre, F., Pimenta, M., Plaszczynski, S., Podobrin, O., Pol, Me, Polok, G., Poropat, P., Pozdniakov, V., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Rahmani, H., Ratoff, Pn, Read, Al, Reale, M., Rebecchi, P., Redaelli, Ng, Regler, M., Reid, D., Renton, Pb, Resvanis, Lk, Richard, F., Richardson, J., Ridky, J., Rinaudo, G., Romero, A., Roncagliolo, I., Ronchese, P., Roos, L., Rosenberg, Ei, Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmannkleider, V., Ruiz, A., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, J., Sannino, M., Schael, S., Schneider, H., Schyns, Mae, Sciolla, G., Scuri, F., Segar, Am, Seitz, A., Sekulin, R., Sessa, M., Seufert, R., Shellard, Rc, Siccama, I., Siegrist, P., Simonetti, S., Simonetto, F., Sisakian, An, Skaali, Tb, Smadja, G., Smirnov, N., Smirnova, O., Smith, Gr, Sosnowski, R., Souzasantos, D., Spassov, T., Spiriti, E., Squarcia, S., Staeck, H., Stanescu, C., Stapnes, S., Stavitski, I., Stavropoulos, G., Stepaniak, K., Stichelbaut, F., Stocchi, A., Strauss, J., Straver, J., Strub, R., Stugu, B., Szczekowski, M., Szeptycka, M., Tabarelli, T., Tchikilev, O., Theodosiou, Ge, Thome, Z., Tilquin, A., Timmermans, J., Timofeev, Vg, Tkatchev, Lg, Todorov, T., Toet, Dz, Tomaradze, A., Tome, B., Torassa, E., Tortora, L., Transtromer, G., Treille, D., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, En, Turluer, Ml, Tuuva, T., Tyapkin, Ia, Tyndel, M., Tzamarias, S., Ueberschaer, B., Ueberschaer, S., Ullaland, O., Uvarov, V., Valenti, G., Vallazza, E., Ferrer, Jav, Vandervelde, C., Vanapeldoorn, Gw, Vandam, P., Vanderheijden, M., Vandoninck, Wk, Vaneldik, J., Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Verlato, M., Vertogradov, Ls, Vilanova, D., Vincent, P., Vitale, L., Vlasov, E., Vodopyanov, As, Vollmer, M., Voutilainen, M., Wahlen, H., Walck, C., Wehr, A., Weierstall, M., Weilhammer, P., Wetherell, Am, Wickens, Jh, Wielers, M., Wilkinson, Gr, Williams, Wsc, Winter, M., Witek, M., Wormser, G., Woschnagg, K., Yip, K., Yushchenko, O., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zimin, Ni, Zito, M., Zontar, D., Zuberi, R., Zumerle, G., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), DELPHI, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Collège de France (CdF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), UCL - SC/PHYS - Département de physique, and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)
Subjects: Quark, Particle physics, E+E ANNIHILATION, Physics and Astronomy (miscellaneous), Hadron, Scalar (mathematics), CHARGED HIGGS, Elementary particle, 01 natural sciences, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Quantum field theory, 010306 general physics, Z0 DECAYS, TECHNIPIONS, PETRA, LEP, Engineering (miscellaneous), Boson, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Higgs boson, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: A search for charged Higgs bosons decaying into quarks is described, based on statistics of around 1.7 million hadronic Zo decays detected in DELPHI. Despite the very high background from standard hadronic decays of the Zo, masses in the range up to 43.5 GeV/c2 are excluded at the 95% confidence level. After combination with a search for leptonic decays, this mass limit is extended to cover all branching ratios. A similar analysis sets new limits on the possible production of any pair-produced heavy scalar decaying into a pair of jets, such as neutral Higgs bosons in a two doublet scheme and diquarks. © 1994 Springer-Verlag.
Published: 1994
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6. INTERFERENCE OF NEUTRAL KAONS IN THE HADRONIC DECAYS OF THE Z(0)

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALGERI, A ALLPORT, P ALMEHED, S and ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P and APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BEGALLI, M BEILLIERE, P BELTRAN, P and BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BIGI, M and BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLOCKI, J and BLUME, M BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORISOV, G and BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O and BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M and BRAIBANT, S BRANCHINI, P BRAND, KD BRENKE, T BRENNER, RA and BRIAND, H BRICMAN, C BRILLAULT, L BROWN, RCA and BRUCKMAN, P BRUNET, JM BUDZIAK, A BUGGE, L BURAN, T and BURMEISTER, H BUYS, A BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V and CANKOCAK, K CAO, F CARENA, F CARROLL, L GIMENEZ, MVC and CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A and CHAPKIN, M CHARPENTIER, P CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R and CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S DAHLJENSEN, E and DAHM, J DALMAGNE, B DAM, M DAMGAARD, G DAUBIE, E and DAUM, A DAUNCEY, PD DAVENPORT, M DAVIES, J DASILVA, W and DEFOIX, C DELPIERRE, P DEMARIA, N DEANGELIS, A and DEBOECK, H DEBOER, W DEBRABANDERE, S DECLERCQ, C LASO, MDMD DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H and DICIACCIO, L DJAMA, F DOLBEAU, J DONSZELMANN, M and DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y and DUPONT, F EDSALL, D EEK, LO EEROLA, PAM EHRET, R and EKELOF, T EKSPONG, G PEISERT, AE ELSING, M ENGEL, JP and ERSHAIDAT, N SANTO, ME FALALEEV, V FASSOULIOTIS, D and FEINDT, M FENYUK, A FERRER, A FILIPPAS, TA FIRESTONE, A and FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ and FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC and FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURSTENAU, H and FUSTER, J GAMBA, D GANDELMAN, M GARCIA, C GARCIA, J and GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GILLESPIE, D GOKIELI, R GOLOB, B and GOLOVATYUK, VM CADENAS, JJGY GOPAL, G GORN, L GORSKI, M and GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSETETE, B GUNNARSSON, P GUY, J and HAEDINGER, U HAHN, F HAHN, M HAHN, S HAIDER, S and HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K and DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T and HENRIQUES, R HERNANDEZ, JJ HERNANDO, JA HERQUET, P and HERR, H HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E and HILKE, HJ HILL, TS HODGSON, SD HOFMOKL, T HOLMGREN, SO and HOLT, PJ HOLTHUIZEN, D HONORE, PF HOULDEN, M HRUBEC, J HUET, K HULTQVIST, K IOANNOU, P IVERSEN, PS and JACKSON, JN JACOBSSON, R JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JONKER, M JONSSON, L and JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M and KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R and KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H and KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORYTOV, AV KOSTIOUKHINE, V and KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KRAMMER, M and KREUTER, C KROLIKOWSKI, J KRONKVIST, I KUCEWICZ, W and KULKA, K KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LANGEFELD, P LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LEVY, JM and LIEB, E LIKO, D LINDGREN, J LINDNER, R LIPNIACKA, A and LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG and LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MAIO, A and MALTEZOS, A MARCO, J MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A MARON, T MARTI, S MARTINEZRIVERO, C and MARTINEZVIDAL, F MATORRAS, F MATTEUZZI, C MATTHIAE, G and MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J and MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I and MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U and MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MURYN, B MYATT, G NARAGHI, F and NAVARRIA, FL NEGRI, P NEMECEK, S NEUMANN, W NEUMEISTER, N NICOLAIDOU, R NIELSEN, BS NILSEN, PES NISS, P and NOMEROTSKI, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R and OSTANKOV, A OSTERBERG, K OURAOU, A PAGANINI, P PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L and PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C and PETROLINI, A PIANA, G PIERRE, F PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P and POZDNIAKOV, V PREST, M PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL and REALE, M REBECCHI, P REDAELLI, NG REGLER, M REID, D and RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, J and RIDKY, J RINAUDO, G ROMERO, A RONCAGLIOLO, I RONCHESE, P and RONNQVIST, C ROSENBERG, EI ROSSO, E ROUDEAU, P and ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A and RYBICKI, K RYBIN, A SAARIKKO, H SACQUIN, Y SAJOT, G and SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H and SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A and SEKULIN, R SESSA, M SEUFERT, R SHELLARD, RC SICCAMA, I and SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN and SKJEVLING, G SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR and SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T SPIRITI, E and SQUARCIA, S STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P and TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOMARADZE, A TOME, B TORASSA, E TORTORA, L TREILLE, D TRISCHUK, W TRISTRAM, G TRONCON, C and TSIROU, A TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T and TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B and UEBERSCHAER, S ULLALAND, O VALENTI, G VALLAZZA, E and FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P and VANDERHEIJDEN, M VANDONINCK, WK VANELDIK, J VAZ, P and VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M and VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V and WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M and WEILHAMMER, P WETHERELL, AM WICKENS, JH WIELERS, M and WILKINSON, GR WILLIAMS, WSC WINTER, M WORMSER, G and WOSCHNAGG, K ZAITSEV, A ZALEWSKA, A ZAVRTANIK, D and ZEVGOLATAKOS, E ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R and ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment, Nuclear Experiment
Abstract: K(S)0K(S)0 correlations have been studied in a sample of 717 511 hadronic events collected by the DELPHI detector at LEP during 1992. An enhancement is found in the production of pairs of K(S)0 of similar momenta, as compared with a Monte Carlo simulated reference sample. The measured values for the strength of the correlation and the radius of the emitting source of kaons are lambda = 1.13 +/- 0.54 (stat) +/- 0.23 (syst) and r = 0.90 +/- 0.19 (stat) +/- 0.10 (syst) fm. This enhancement is consistent with the hypothesis that K(S)0K(S)0 pairs display an enhancement, regardless of whether they come from a K0K0BAR or from a K0K0 (K0K0BAR) system.
Published: 1994

7. IMPROVED MEASUREMENTS OF CROSS-SECTIONS AND ASYMMETRIES AT THE Z(0) RESONANCE

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALLPORT, P ALMEHED, S ALMEIDA, FML ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P and APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEGALLI, M BEILLIERE, P and BELOUS, K BELTRAN, P BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLOCKI, J BLYTH, S BOCCI, V BOGOLUBOV, PN and BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL and BORISOV, G BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O and BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M and BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H and BRICMAN, C BRILLAULT, L BROWN, RCA BRUNET, JM BUGGE, L BURAN, T BUYS, A BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V and CANKOCAK, K CAO, F CARENA, F CARRILHO, P CARROLL, L and CASES, R CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR and CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P CHAUVEAU, J and CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P and CHOROWICZ, V CHRIN, JTM CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S and DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G and DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVIES, J and DASILVA, W DEFOIX, C DELLARICCA, G DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S and DECLERCQ, C DEFEZLASO, MDM DELAVAISSIERE, C DELOTTO, B and DEMIN, A DEPAULA, L DIJKSTRA, H DICIACCIO, L DJAMA, F and DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DUPONT, F EDSALL, D EEK, LO and EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ELSING, M and ENGEL, JP ERSHAIDAT, N SANTO, ME FASSOULIOTIS, D FEINDT, M FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H and FOKITIS, E FONTANELLI, F FORBES, KAJ FORMENTI, F and FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC and FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURSTENAU, H and FUSTER, J GAMBA, D GANDELMAN, M GARCIA, C GARCIA, J and GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GERDYUKOV, L GIACOMELLI, P GILLESPIE, D GOKIELI, R and GOLOB, B GOLOVATYUK, VM CADENAS, JJGY GOPAL, G GORN, L GORSKI, M GRACCO, V GRARD, F GRAZIANI, E and GROSDIDIER, G GROSSETETE, B GUNNARSSON, P GUY, J and HAEDINGER, U HAHN, F HAHN, M HAHN, S HAIDER, S and HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K and DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V and HENRIQUES, R HERNANDEZ, JJ HERNANDO, JA HERQUET, P HERR, H HESSING, TL HIGGINS, CO HIGON, E HILKE, HJ HILL, TS HODGSON, SD HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D and HONORE, PF HOULDEN, M HRUBEC, J HUET, K HULTQVIST, K and IOANNOU, P IVERSEN, PS JACKSON, JN JACOBSSON, R JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK and JONKER, M JONSSON, L JUILLOT, P KAISER, M KALMUS, G and KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S and KATSOUFIS, EC KERANEN, R KHOMENKO, BA KHOVANSKI, NN and KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P and KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P and KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIOUKHINE, V and KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KRAMMER, M and KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUPINSKI, W and KULKA, K KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LANGEFELD, P LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T and LEVY, JM LIEB, E LIKO, D LINDNER, R LIPNIACKA, A and LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG and LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MAIO, A and MALTEZOS, A MANDL, F MARCO, J MARECHAL, B MARGONI, M and MARIN, JC MARIOTTI, C MARKOU, A MARON, T MARTI, S and MARTINEZRIVERO, C MARTINEZVIDAL, F MATORRAS, F and MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C MEYER, WT and MICHELOTTO, M MIGLIORE, E MIKULEC, I MIRABITO, L and MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL and NEGRI, P NEMECEK, S NEUMANN, W NEUMEISTER, N and NICOLAIDOU, R NIELSEN, BS NILSEN, PES NISS, P and NOMEROTSKI, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R and OSTANKOV, A OSTERBERG, K OURAOU, A PAGANINI, P PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L and PERNEGGER, H PERNICKA, M PERROTTA, A PETROLINI, A PIANA, G PIERRE, F PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O and POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PREST, M and PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REALE, M REBECCHI, P and REDAELLI, NG REID, D RENTON, PB RESVANIS, LK and RICHARD, F RICHARDSON, J RIDKY, J RINAUDO, G ROMERO, A and RONCAGLIOLO, I RONCHESE, P RONJIN, V ROSENBERG, EI and ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H and SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M and SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F and SEGAR, AM SEITZ, A SEKULIN, R SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F and SISAKIAN, AN SKJEVLING, G SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T and SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S and STAVROPOULOS, G STEPANIAK, K STICHELBAUT, F STOCCHI, A and STRAUSS, J STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TCHIKILEV, O and THEODOSIOU, GE THOME, Z TILQUIN, A TIMMERMANS, J and TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TOME, B TORASSA, E TORTORA, L TREILLE, D TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN and TURALA, M TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M and TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O and UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M and VANDONINCK, WK VANELDIK, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS and VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H and WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P and WETHERELL, AM WICKENS, JH WIELERS, M WILKINSON, GR and WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K and ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D and ZEVGOLATAKOS, E ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R and ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: During the 1992 running period of the LEP e+e- collider, the DELPHI experiment accumulated approximately 24 pb-1 of data at the Z0 peak. The decays into hadrons and charged leptons have been analysed to give values for the cross sections and leptonic forward-backward asymmetries which are significantly improved with respect to those previously published by the DELPHI collaboration. Incorporating these new data, more precise values for the Z0 resonance parameters are obtained from model-independent fits. The results are interpreted within the framework of the Standard Model, yielding for the top quark mass m(t) = 157(-48)+36(expt.)-20(+19)(Higgs) GeV, and for the effective mixing angle sin2 theta(eff)lept = 0.2328 +/- 0.0013 (expt.)-0.0003(+0.0001)(Higgs), where (Higgs) represents the variation due to Higgs boson mass in the range 60 to 1000 GeV, with central value 300 GeV.
Published: 1994

8. Measurement of the B-0-(b)over-bar-0 Mixing Parameter In Delphi

Author: Abreu, P, Adam, W, Adye, T, Agasi, E, Ajinenko, I, Aleksan, R, Alekseev, Gd, Allport, Pp, Almehed, S, Almeida, Fml, Alvsvaag, Sj, Amaldi, U, Andreazza, A, Antilogus, P, Apel, Wd, Apsimon, Rj, Arnoud, Y, Asman, B, Augustin, Je, Augustinus, A, Baillon, P, Bambade, P, Barao, F, Barate, R, Barbiellini, G, Bardin, Dy, Barker, Gj, Baroncelli, A, Barring, O, Barrio, Ja, Bartl, W, Bates, Mj, Battaglia, M, Baubillier, M, Becks, Kh, Begalli, M, Beilliere, P, Beltran, P, Benvenuti, Ac, Berggren, M, Bertrand, D, Bianchi, F, Bigi, M, Bilenky, Ms, Billoir, P, Bjarne, J, Bloch, D, Blocki, J, Blyth, S, Bocci, V, Bogolubov, Pn, Bolognese, T, Bonesini, M, Bonivento, W, Booth, Psl, Borisov, G, Bosio, C, Bostjancic, B, Bosworth, S, Botner, O, Bouquet, B, Bourdarios, C, Bowcock, Tjv, Bozzo, M, Braibant, S, Branchini, P, Brand, Kd, Brenner, Ra, Briand, H, Bricman, C, Brillault, L, Brown, Rca, Brunet, Jm, Bugge, L, Buran, T, Buys, A, Buytaert, Jama, Caccia, Massimo, Calvi, M, Rozas, Ajc, Campion, R, Camporesi, T, Canale, V, Cankocak, K, Cao, F, Carena, F, Carrilho, P, Carroll, L, Cases, R, Caso, C, Gimenez, Mvc, Cattai, A, Cavallo, Fr, Cerrito, L, Chabaud, V, Chan, A, Charpentier, P, Chauveau, J, Checchia, P, Chelkov, Ga, Chevalier, L, Chliapnikov, P, Chorowicz, V, Chrin, Jtm, Cindro, V, Collins, P, Contreras, Jl, Contri, R, Cortina, E, Cosme, G, Couchot, F, Crawley, Hb, Crennell, D, Crosetti, G, Maestro, Jc, Czellar, S, Dahljensen, E, Dahm, J, Dalmagne, B, Dam, M, Damgaard, G, Daubie, E, Daum, A, Dauncey, Pd, Davenport, M, Davies, J, Dasilva, W, Defoix, C, Delpierre, P, Demaria, N, Deangelis, A, Deboeck, H, Deboer, W, Debrabandere, S, Declercq, C, Laso, Mdmd, Delavaissiere, C, Delotto, B, Demin, A, Depaula, L, Dijkstra, H, Diciaccio, L, Djama, F, Dolbeau, J, Donszelmann, M, Doroba, K, Dracos, M, Drees, J, Dris, M, Dufour, Y, Dupont, F, Edsall, D, Ehret, R, Ekelof, T, Ekspong, G, Elsing, M, Engel, Jp, Ershaidat, N, Santo, Me, Falaleev, V, Fassouliotis, D, Feindt, M, Fenyuk, A, Ferrer, A, Filippas, Ta, Firestone, A, Foeth, H, Fokitis, E, Fontanelli, F, Formenti, F, Fousset, Jl, Francon, S, Franek, B, Frenkiel, P, Fries, Dc, Frodesen, Ag, Fuldaquenzer, F, Furstenau, H, Fuster, J, Gamba, D, Gandelman, M, Garcia, C, Garcia, J, Gaspar, C, Gasparini, U, Gavillet, P, Gazis, En, Gele, D, Gerber, Jp, Giacomelli, P, Gillespie, D, Gokieli, R, Golob, B, Golovatyuk, Vm, Cadenas, Jjgy, Gopal, G, Gorn, L, Gorski, M, Gracco, V, Grard, F, Graziani, E, Grosdidier, G, Gunnarsson, P, Guy, J, Haedinger, U, Hahn, F, Hahn, M, Hahn, S, Haider, S, Hajduk, Z, Hakansson, A, Hallgren, A, Hamacher, K, Demonchenault, Gh, Hao, W, Harris, Fj, Hedberg, V, Henriques, R, Hernandez, Jj, Hernando, Ja, Herquet, P, Herr, H, Hessing, Tl, Higon, E, Hilke, Hj, Hill, Ts, Holmgren, So, Holt, Pj, Holthuizen, D, Honore, Pf, Houlden, M, Hrubec, J, Huet, K, Hultqvist, K, Ioannou, P, Iversen, Ps, Jackson, Jn, Jacobsson, R, Jalocha, P, Jarlskog, G, Jarry, P, Jeanmarie, B, Johansson, Ek, Jonker, M, Jonsson, L, Juillot, P, Kaiser, M, Kalmus, G, Kapusta, F, Karlsson, M, Karvelas, E, Katsanevas, S, Katsoufis, Ec, Keranen, R, Khomenko, Ba, Khovanski, Nn, King, B, Kjaer, Nj, Klein, H, Klovning, A, Kluit, P, Kochmehrin, A, Koehne, Jh, Koene, B, Kokkinias, P, Koratzinos, M, Korcyl, K, Korytov, Av, Kostioukhine, V, Kourkoumelis, C, Kouznetsov, O, Kramer, Ph, Krammer, M, Kreuter, C, Krolikowski, J, Kronkvist, I, Krupinski, W, Kulka, K, Kurvinen, K, Lacasta, C, Lambropoulos, C, Lamsa, Jw, Lanceri, L, Langefeld, P, Lapin, V, Last, I, Laugier, Jp, Lauhakangas, R, Leder, G, Ledroit, F, Leitner, R, Lemoigne, Y, Lemonne, J, Lenzen, G, Lepeltier, V, Lesiak, T, Levy, Jm, Lieb, E, Liko, D, Lindner, R, Lipniacka, A, Lippi, I, Lerstad, B, Lokajicek, M, Loken, Jg, Lopezfernandez, A, Aguera, Mal, Los, M, Loukas, D, Lozano, Jj, Lutz, P, Lyons, L, Maehlum, G, Maillard, J, Maio, A, Maltezos, A, Mandl, F, Marco, J, Marechal, B, Margoni, M, Marin, Jc, Mariotti, C, Markou, A, Maron, T, Marti, S, Martinezrivero, C, Martinezvidal, F, Matorras, F, Matteuzzi, C, Matthiae, G, Mazzucato, M, Mccubbin, M, Mckay, R, Mcnulty, R, Medbo, J, Meroni, C, Meyer, Wt, Michelotto, M, Migliore, E, Mikulec, I, Mirabito, L, Mitaroff, Wa, Mitselmakher, Gv, Mjoernmark, U, Moa, T, Moeller, R, Moenig, K, Monge, Mr, Morettini, P, Mueller, H, Murray, Wj, Muryn, B, Myatt, G, Naraghi, F, Navarria, Fl, Negri, P, Nemecek, S, Neumann, W, Neumeister, N, Nicolaidou, R, Nielsen, Bs, Nikolaenko, V, Nilsen, Pes, Niss, P, Nomerotski, A, Normand, A, Novak, M, Obraztsov, V, Olshevski, Ag, Orava, R, Osterberg, K, Ouraou, A, Paganini, P, Paganoni, M, Pain, R, Palka, H, Papadopoulou, Td, Pape, L, Parodi, F, Passeri, A, Pegoraro, M, Pennanen, J, Peralta, L, Pernegger, H, Pernicka, M, Perrotta, A, Petridou, C, Petrolini, A, Phillips, Ht, Piana, G, Pierre, F, Pimenta, M, Plaszczynski, S, Podobrin, O, Pol, Me, Polok, G, Poropat, P, Pozdniakov, V, Prest, Michela, Privitera, P, Pullia, A, Radojicic, D, Ragazzi, S, Rahmani, H, Ratoff, Pn, Read, Al, Reale, M, Rebecchi, P, Redaelli, Ng, Reglre, M, Reid, D, Renton, Pb, Resvanis, Lk, Richard, F, Richardson, J, Ridky, J, Rinaudo, G, Romero, A, Roncagliolo, I, Ronchese, P, Roos, L, Rosenberg, Ei, Rosso, E, Roudeau, P, Rovelli, T, Ruckstruhl, W, Ruhlmannkleider, V, Ruiz, A, Rybicki, K, Saarikko, H, Sacquin, Y, Sajot, G, Salt, J, Sanchez, J, Sannino, M, Schael, S, Schneider, H, Schyns, Mae, Sciolla, G, Scuri, F, Segar, Am, Seitz, A, Sekulin, R, Sessa, M, Seufert, R, Shellard, Rc, Siccama, I, Siegrist, P, Simonetti, S, Simonetto, F, Sisakian, An, Skjevling, G, Smadja, G, Smirnov, N, Smirnova, O, Smith, Gr, Sosnowski, R, Souzasantos, D, Spassov, T, Spiriti, E, Squarcia, S, Staeck, H, Stanescu, C, Stapnes, S, Stavitski, I, Stavropoulos, G, Stepaniak, K, Stichelbaut, F, Stocchi, A, Strauss, J, Straver, J, Strub, R, Stugu, B, Szczekowski, M, Szeptycka, M, Tabarelli, T, Tchilkilev, O, Theodosiou, Ge, Thome, Z, Tilquin, A, Timmermans, J, Timofeev, Vg, Tkatchev, Lg, Todorov, T, Toet, Dz, Tomaradze, A, Tome, B, Torassa, E, Tortora, L, Transtromer, G, Treille, D, Trischuk, W, Tristram, G, Troncon, C, Tsirou, A, Tsyganov, En, Turala, M, Turluer, Ml, Tuuva, T, Tyapkin, Ia, Tyndel, M, Tzamarias, S, Ueberschaer, B, Ueberschaer, S, Ullaland, O, Uvarov, V, Valenti, G, Vallazza, E, Ferrer, Jav, Vandervelde, C, Vanapeldoorn, Gw, Vandam, P, Vanderheijden, M, Vandoninck, Wk, Vaneldik, J, Vaz, P, Vegni, G, Ventura, L, Venus, W, Verbeure, F, Verlato, M, Vertogradov, Ls, Vilanova, D, Vincent, P, Vitale, L, Vlasov, E, Vodopyanov, As, Vollmer, M, Voutilainen, M, Vrba, V, Wahlen, H, Walck, C, Waldner, F, Wehr, A, Weierstall, M, Weilhammer, P, Wetherell, Am, Wickens, Jh, Wielers, M, Wilkinson, Gr, Williams, Wsc, Winter, M, Witek, M, Wormser, G, Woschnagg, K, Yip, K, Yushchenko, O, Zaitsev, A, Zalewska, A, Zalewski, P, Zavrtanik, D, Zevgolatakos, E, Zimin, Ni, Zito, M, Zontar, D, Zuberi, R, and Zumerle, G.
Subjects: COLLIDER, Z(0) DECAYS, BARYON PRODUCTION, HADRONIC DECAYS, RESONANCE, LIFETIME, LAMBDA, B0 mixing, LEP, b tagging technique, DELPHI
Abstract: A total of about 900 000 Z0 → qq decays have been analyzed to measure the B0B0 mixing probability. Two different b tagging techniques have been used: events with two leptons and events with one lepton and one Λ. From a combination of the two methods the average mixing parameter, χ, was determined to be (12.1±1.6(stat.)±0.4(syst.)±0.4(model)%. © 1994.
Published: 1994

9. MEASUREMENT OF TIME-DEPENDENT B-D(0) (B)OVER-BAR-D(0) MIXING

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALMEIDA, FML ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P and APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARDIN, DY BARKER, GJ BARONCELLI, A BARRING, O and BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M and BAUDOT, J BECKS, KH BEGALLI, M BEILLIERE, P BELOUS, K BELTRAN, P BENVENUTI, AC BERGGREN, M BERTRAND, D and BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P BJARNE, J and BLOCH, D BLOCKI, J BLYTH, S BOCCI, V BOGOLUBOV, PN and BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL and BORISOV, G BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O and BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M and BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H and BRICMAN, C BRILLAULT, L BROWN, RCA BRUCKMAN, P and BRUNET, JM BUGGE, L BURAN, T BUYS, A CACCIA, M and CALVI, M ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V and CANKOCAK, K CAO, F CARENA, F CARRILHO, P CARROLL, L and CASES, R CASO, C GIMENEZ, MV CATTAI, A CAVALLO, E and CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P and CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA and CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM CINDRO, V and COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G and COSSUTTI, F COUCHOT, F CRAWLEY, HB CRENNELL, D and CROSETTI, G MAESTRO, JC CZELLAR, S DAHLJENSEN, E DAHM, J and DALMAGNE, B DAM, M DAMGAARD, G DAUBIE, E DAUM, A and DAUNCEY, PD DAVENPORT, M DAVIES, J DASILVA, W DEFOIX, C and DELLARICCA, G DELPIERRE, P DEMARIA, N DEANGELIS, A and DEBOECK, H DEBOER, W DEBRABANDERE, S DECLERCQ, C LASO, MDMD LAVAISSIERE, CD DELOTTO, B DEMIN, A DEPAULA, L and DESAINTJEAN, C DIJKSTRA, H DICIACCIO, L DJAMA, F and DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J and DRIS, M DUFOUR, Y DUPONT, E EDSALL, D EHRET, R and EKELOF, T EKSPONG, G ELSING, M ENGEL, JP ERSHAIDAT, N and SANTO, ME FASSOULIOTIS, D FEINDT, M FERRER, A and FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, E FORMENTI, F FOUSSET, JL FRANEK, B and FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R and FULDAQUENZER, F FURSTENAU, H FUSTER, J GAMBA, D and GANDELMAN, M GARCIA, C GARCIA, J GASPAR, C GASPARINI, U and GAVILLET, P GAZIS, EN GELE, D GERBER, JP GILLESPIE, D GOKIELI, R GOLOB, B GOLOVATYUK, VM GOMEZ, JJ and CADENAS, Y GOPAL, G GORN, L GORSKI, M GRACCO, V and GRARD, F GRAZIANI, E GROSDIDIER, G GUNNARSSON, P GUY, J and HAEDINGER, U HAHN, F HAHN, S HAIDER, S HAJDUK, Z and HAKANSSON, A HALLGREN, A HAMACHER, K HAO, W HARRIS, FJ and HEDBERG, V HENRIQUES, R HERNANDEZ, JJ HERNANDO, JA and HERQUET, P HERR, H HESSING, TL HIGON, E HILKE, HJ and HILL, TS HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HONORE, PE and HOULDEN, M HRUBEC, J HUET, K HULTQVIST, K IOANNOU, P and IVERSEN, PS JACKSON, JN JACOBSSON, R JALOCHA, P and JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JONSSON, L JUILLOT, P KAISER, M KALMUS, G KAPUSTA, F and KARLSSON, M KARVELAS, E KATARGIN, A KATSANEVAS, S and KATSOUFIS, EC KERANEN, R KHOMENKO, BA KHOVANSKI, NN and KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P and KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P and KORATZINOS, M KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C and KOUZNETSOV, O KRAMER, PH KRAMMER, M KREUTER, C and KROLIKOWSKI, J KRONKVIST, I KRUPINSKI, W KUCEWICZ, W and KULKA, K KURVINEN, K LACASTA, C LAKTINEH, I and LAMBROPOULOS, C LAMSA, JW LANCERI, L LANGEFELD, P LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R LEDER, G and LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G and LEPELTIER, V LESIAK, T LEVY, JM LIEB, E LIKO, D and LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEKJ, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M and LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G and MAILLARD, J MAIO, A MALTEZOS, A MANDL, F MARCO, J and MARECHAL, B MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A and MARON, T MARTI, S MARTINEZRIVERO, C MARTINEZVIDAL, F and MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M and MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C and MEYER, WT MICHELOTTO, M MIGLIORE, E MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL and NEGRI, P NEMECEK, S NEUMANN, W NICOLAIDOU, R and NIELSEN, BS NIKOLAENKO, V NISS, P NOMEROTSKI, A NORMAND, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTERBERG, K and OURAOU, A PAGANINI, P PAGANONI, M PAIN, R PALKA, H and PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PEREVOZCHIKOV, V PERNEGGER, H and PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A and PHILLIPS, HT PIANA, G PIERRE, F PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P and POZDNIAKOV, V PREST, M PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL and REALE, M REBECCHI, P REDAELLI, NG REGLER, M REID, D and RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, J and RIDKY, J RINAUDO, G RIPP, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P ROOS, L ROSENBERG, EI ROSSO, E ROUDEAU, P and ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A and SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J and SANNINO, M SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F and SEGAR, AM SEITZ, A SEKULIN, R SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F and SISAKIAN, AN SKAALI, TB SMADJA, G SMIRNOV, N SMIRNOVA, O and SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T and SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S and STAVITSKI, I STAVROPOULOS, G STEPANIAK, K STICHELBAUT, F and STOCCHI, A STRAUSS, J STRAVER, J STRUB, R STUGU, B and SZCZEKOWSKI, M SZEPTYCKA, M TABARELLI, T TCHIKILEV, O and THEODOSIOU, GE THOME, Z TILQUIN, A TIMMERMANS, J and TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TOME, B TORASSA, E TORTORA, L TRANSTROMER, G and TREILLE, D TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A and TSYGANOV, EN TURLUER, ML TUUVA, T TYAPKIN, IA and TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VANELDIK, J VEGNI, G VENTURA, L and VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS and VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H and WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P and WETHERELL, AM WICKENS, JH WIELERS, M WILKINSON, GR and WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K and YIP, K YUSHCHENKO, O ZACH, F ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZIMM, NI and ZITO, M ZONTAR, D ZUBERI, R ZUMERLE, G
Subjects: High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Nuclear Experiment
Abstract: The time dependent mixing of B-d(0)-(B) over bar(d)(0) mesons has been observed by using the correlations between the charge of D-* mesons and the weighted mean charge of particles in each hemisphere. From a reconstructed D-*+/- sample corresponding to about 1.7 million hadronic Z(0) decays, the mass difference between the two B-d(0) mass eigenstates has been measured to be hm = 0.50 +/- 0.12 (stat.) +/- 0.06 (syst.) (h) over bar/ps or, converting into eV/c(2): Delta m = [3.29 +/- 0.79 (stat.) +/- 0.39 (syst.)] 10(-4) eV/c(2).
Published: 1994

10. MEASUREMENT OF THE B0-(B0)OVER-BAR MIXING USING THE AVERAGE ELECTRIC CHARGE OF HADRON-JETS IN Z0-DECAYS

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALGERI, A ALLPORT, P ALMEHED, S and ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P and APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEGALLI, M BEILLIERE, P and BELOKOPYTOV, Y BELTRAN, P BENVENUTI, AC BERGGREN, M and BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P and BJARNE, J BLOCH, D BLOCKI, J BLYTH, S BOCCI, V and BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W and BOOTH, PSL BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B and BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C and BOWCOCK, TJV BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD and BRENNER, RA BRIAND, H BRICMAN, C BRILLAULT, L BROWN, RCA BRUCKMAN, P BRUNET, JM BUDZIAK, A BUGGE, L and BURAN, T BURMEISTER, H BUYS, A BUYTAERT, JAMA CACCIA, M and CALVI, M ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CANKOCAK, K CAO, F CARENA, F CARROLL, L CASO, C and GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L and CHABAUD, V CHAN, A CHAPKIN, M CHARPENTIER, P CHAVEAU, J and CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P and CHOROWICZ, V CHRIN, JTM CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S and DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G and DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVIES, J and DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S DECLERCQ, C and LASO, MDMD DELAVAISSIERE, C DELOTTO, B DEMIN, A and DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DUPONT, F EDSALL, D EEK, LO EEROLA, PAM and EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ELSING, M and ENGEL, JP ERSHAIDAT, N SANTO, ME FASSOULIOTIS, D FEINDT, M FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H and FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL and FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG and FRUHWIRTH, R FULDAQUENZER, F FURSTENAU, H FUSTER, J and GAMBA, D GANDELMAN, M GARCIA, C GARCIA, J GASPAR, C and GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP and GIACOMELLI, P GILLESPIE, D GOKIELI, R GOLOB, B and GOLOVATYUK, VM CADENAS, JJGY GOPAL, G GORN, L GORSKI, M and GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSETETE, B GUNNARSSON, P GUY, J and HAEDINGER, U HAHN, F HAHN, M HAHN, S HAIDER, S and HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K and DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T and HENRIQUES, R HERNANDEZ, JJ HERNANDO, JA HERQUET, P and HERR, H HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E and HILKE, HJ HILL, TS HODGSON, SD HOFMOKL, T HOLMGREN, SO and HOLT, PJ HOLTHUIZEN, D HONORE, PF HOULDEN, M HRUBEC, J HUET, K HULTQVIST, K IOANNOU, P IVERSEN, PS and JACKSON, JN JACOBSSON, R JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JONKER, M JONSSON, L and JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M and KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R and KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H and KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORCYL, K KORYTOV, AV and KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH and KRAMMER, M KREUTER, C KROLIKOWSKI, J KRONKVIST, I and KRUPINSKI, W KUCEWICZ, W KULKA, K KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LANGEFELD, P and LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R LEDROIT, F and LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G and LEPELTIER, V LEVY, JM LIEB, E LIKO, D LINDGREN, J and LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M and LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G and MAILLARD, J MAIO, A MALTEZOS, A MANDL, F MARCO, J and MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A MARON, T and MARTI, S MARTINEZRIVERO, C MARTINEZVIDAL, F MATORRAS, F and MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C MEYER, WT and MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA and MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ and MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NEGRI, P and NEMECEK, S NEUMANN, W NEUMEISTER, N NICOLAIDOU, R and NIELSEN, BS NIKOLAENKO, V NILSEN, PES NISS, P and NOMEROTSKI, A NOVAK, M OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANINI, P and PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L and PARODI, F PASSERI, A PEGORARO, M PENNANEN, J and PERALTA, L PERNEGGER, H PERNICKA, M PERROTTA, A and PETRIDOU, C PETROLINI, A PIANA, G PIERRE, F PIMENTA, M and PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G and POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P PULLIA, A and RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REALE, M REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, J and RIDKY, J RINAUDO, G ROMERO, A RONCAGLIOLO, I RONCHESE, P and RONNQVIST, C ROSENBERG, EI ROSSO, E ROUDEAU, P and ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A and SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J and SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G and SCURI, F SEGAR, AM SEITZ, A SEKULIN, R SESSA, M and SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P and SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKJEVLING, G and SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR SOSNOWSKI, R and SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P and TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOMARADZE, A TOME, B TORASSA, E TORTORA, L TREILLE, D TRISCHUK, W TRISTRAM, G TRONCON, C and TSIROU, A TSYGANOV, EN TURLUER, ML TUUVA, T TYAPKIN, IA and TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VANELDIK, J VAZ, P VEGNI, G and VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E and VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M and WEILHAMMER, P WETHERELL, AM WICKENS, JH WIELERS, M and WILKINSON, GR WILLIAMS, WSC WINTER, M WORMSER, G and WOSCHNAGG, K ZAITSEV, A ZALEWSKA, A ZAVRTANIK, D and ZEVGOLATAKOS, E ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R and ZUMERLE, G ZUNIGA, J
Subjects: Physics::Instrumentation and Detectors, High Energy Physics::Experiment, Nuclear Experiment
Abstract: From the data recorded with the DELPHI detector at LEP in the years 1991-1992, 46 497 events were selected having a high-momentum muon in hadron jets. A fit to the average electric charge sum of the jets recoiling against a b-quark jet tagged by a high-PT muon results in an average mixing parameter of chiBAR = 0.144 +/- 0.014(stat.)+0.017/-0.011(syst.).
Published: 1994

11. A MEASUREMENT OF THE B(S)0 MESON MASS

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R and ALEKSEEV, GD ALLPORT, P ALMEHED, S ALMEIDA, FML and ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEGALLI, M BEILLIERE, P and BELOKOPYTOV, Y BELTRAN, P BENVENUTI, AC BERGGREN, M and BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P and BJARNE, J BLOCH, D BLOCKI, J BLYTH, S BOCCI, V and BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W and BOOTH, PSL BORISOV, G BOSIO, C BOSTJANCIC, B BOSWORTH, S and BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV and BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA and BRIAND, H BRICMAN, C BRILLAULT, L BROWN, RCA and BRUCKMAN, P BRUNET, JM BUDZIAK, A BUGGE, L BURAN, T and BUYS, A BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC and CAMPION, R CAMPORESI, T CANALE, V CANKOCAK, K CAO, F and CARENA, F CARRILHO, P CARROLL, L CASES, R CASO, C and GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V and CHAN, A CHAPKIN, M CHARPENTIER, P CHAUVEAU, J and CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P and CHOROWICZ, V CHRIN, JTM CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S and DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G and DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVIES, J and DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DEBRANDERE, S DECLERCQ, C and LASO, MDMD DELAVAISSIERE, C DELOTTO, B DEMIN, A DEPAULA, L DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DUPONT, F EDSALL, D EEK, LO EHRET, R and EKELOF, T EKSPONG, G PEISERT, AE ELSING, M ENGEL, JP and ERSHAIDAT, N SANTO, ME FASSOULIOTIS, D FEINDT, M FENYUK, A FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H and FOKITIS, E FONTANELLI, F FORBES, KAJ FORMENTI, F and FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC and FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURSTENAU, H and FUSTER, J GAMBA, D GANDELMAN, M GARCIA, C GARCIA, J and GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GILLESPIE, D GOKIELI, R GOLOB, B and GOLOVATYUK, VM CADENAS, JJGY GOPAL, G GORN, L GORSKI, M and GRACCO, V GRARD, F GRAZIANI, E GROSDIDIER, G and GROSSETETE, B GUNNARSSON, P GUY, J HAEDINGER, U HAHN, F and HAHN, M HAHN, S HAIDER, S HAJDUK, Z HAKANSSON, A and HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENRIQUES, R HERNANDEZ, JJ HERNANDO, JA and HERQUET, P HERR, H HESSING, TL HIGGINS, CO HIGON, E and HILKE, HJ HILL, TS HODGSON, SD HOFMOKL, T HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HONORE, PF HOULDEN, M and HRUBEC, J HUET, K HULTQVIST, K IOANNOU, P IVERSEN, PS and JACKSON, JN JACOBSSON, R JALOCHA, P JARLSKOG, G and JARRY, P JEANMARIE, B JOHANSSON, EK JONKER, M JONSSON, L and JUILLOT, P KAISER, M KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P KOCHMEHRIN, A and KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORCYL, K and KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KREUTER, C KROLIKOWSKI, J KRONKVIST, I and KRUPINSKI, W KUCEWICZ, W KULKA, K KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LANGEFELD, P and LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R LEDER, G and LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G and LEPELTIER, V LEVY, JM LIEB, E LIKO, D LINDNER, R and LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG and LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D and LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J and MAIO, A MALTEZOS, A MANDL, F MARCO, J MARECHAL, B and MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A MARON, T and MARTI, S MARTINEZRIVERO, C MARTINEZVIDAL, F MATORRAS, F and MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C MEYER, WT and MICHELOTTO, M MIGLIORE, E MIKULEC, I MIRABITO, L and MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL and NEGRI, P NEMECEK, S NEUMANN, W NEUMEISTER, N and NICOLAIDOU, R NIELSEN, BS NIKOLAENKO, V NILSEN, PES and NISS, P NOMEROTSKI, A NOVAK, M OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A and PAGANINI, P PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M and PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PIANA, G PIERRE, F and PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O POL, ME and POLOK, G POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P and PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REALE, M REBECCHI, P REDAELLI, NG and REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F and RICHARDSON, J RIDKY, J RINAUDO, G ROMERO, A RONCAGLIOLO, I RONCHESE, P ROSENBERG, EI ROSSO, E ROUDEAU, P and ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A and SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J and SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G and SCURI, F SEGAR, AM SEITZ, A SEKULIN, R SESSA, M and SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P and SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKJEVLING, G and SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR SOSNOWSKI, R and SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P and TABARELLI, T TCHIKILEV, O THEODOSIOU, GE THOME, Z and TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG and TODOROV, T TOET, DZ TOMARADZE, A TOME, B TORASSA, E and TORTORA, L TREILLE, D TRISCHUK, W TRISTRAM, G TRONCON, C and TSIROU, A TSYGANOV, EN TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P and VANDERHEIJDEN, M VANDONINCK, WK VANELDIK, J VAZ, P and VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M and VERTOGRADOV, LS VILANOVA, D VINCENT, P VLASOV, E and VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M and WEILHAMMER, P WETHERELL, AM WICKENS, JH WIELERS, M and WILKINSON, GR WILLIAMS, WSC WINTER, M WORMSER, G and WOSCHNAGG, K ZAITSEV, A ZALEWSKA, A ZAVRTANIK, D and ZEVGOLATAKOS, E ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R and ZUMERLE, G
Subjects: High Energy Physics::Phenomenology, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract: Strange beauty mesons B(s)0 have been reconstructed through exclusive hadronic final states, using the data collected in 1992 by the DELPHI experiment at the LEP collider. The analysis relies on the combined use of accurate tracking and of the hadron identification capabilities of DELPHI. Three B(s)0 decay candidates have been selected over a negligible background using the D(s)- pi+, D(s)- a1+ (1260) and J/ psi phi decay modes, with identified kaons in the final state. The B(s)0 meson mass is measured to be m(b)s = (5374 +/- 16 +/- 2) MeV/c2.
Published: 1994

12. MEASUREMENT OF THE B0-(B0)OVER-BAR MIXING USING THE AVERAGE ELECTRIC CHARGE OF HADRON-JETS IN Z0-DECAYS

Author: Abreu, P, Adam, W, Adye, T, Agasi, E, Ajinenko, I, Aleksan, R, Alekseev, Gd, Algeri, A, Allport, P, Almehed, S, Alvsvaag, Sj, Amaldi, U, Andreazza, A, Antilogus, P, Apel, Wd, Apsimon, Rj, Arnoud, Y, Asman, B, Augustin, Je, Augustinus, A, Baillon, P, Bambade, P, Barao, F, Barate, R, Barbiellini, G, Bardin, Dy, Barker, Gj, Baroncelli, A, Barring, O, Barrio, Ja, Bartl, W, Bates, Mj, Battaglia, M, Baubillier, M, Becks, Kh, Begalli, M, Beilliere, P, Belokopytov, Y, Beltran, P, Benvenuti, Ac, Berggren, M, Bertrand, D, Bianchi, F, Bigi, M, Bilenky, Ms, Billoir, P, Bjarne, J, Bloch, D, Blocki, J, Blyth, S, Bocci, V, Bogolubov, Pn, Bolognese, T, Bonesini, M, Bonivento, W, Booth, Psl, Borisov, G, Borner, H, Bosio, C, Bostjancic, B, Bosworth, S, Botner, O, Bouquet, B, Bourdarios, C, Bowcock, Tjv, Bozzo, M, Braibant, S, Branchini, P, Brand, Kd, Brenner, Ra, Briand, H, Bricman, C, Brillault, L, Brown, Rca, Bruckman, P, Brunet, Jm, Budziak, A, Bugge, L, Buran, T, Burmeister, H, Buys, A, Buytaert, Jama, Caccia, Massimo, Calvi, M, Rozas, Ajc, Campion, R, Camporesi, T, Canale, V, Cankocak, K, Cao, F, Carena, F, Carroll, L, Caso, C, Gimenez, Mvc, Cattai, A, Cavallo, Fr, Cerrito, L, Chabaud, V, Chan, A, Chapkin, M, Charpentier, P, Chaveau, J, Checchia, P, Chelkov, Ga, Chevalier, L, Chliapnikov, P, Chorowicz, V, Chrin, Jtm, Cindro, V, Collins, P, Contreras, Jl, Contri, R, Cortina, E, Cosme, G, Couchot, F, Crawley, Hb, Crennell, D, Crosetti, G, Maestro, Jc, Czellar, S, Dahljensen, E, Dahm, J, Dalmagne, B, Dam, M, Damgaard, G, Daubie, E, Daum, A, Dauncey, Pd, Davenport, M, Davies, J, Dasilva, W, Defoix, C, Delpierre, P, Demaria, N, Deangelis, A, Deboeck, H, Deboer, W, Debrabandere, S, Declercq, C, Laso, Mdmd, Delavaissiere, C, Delotto, B, Demin, A, Dijkstra, H, Diciaccio, L, Djama, F, Dolbeau, J, Donszelmann, M, Doroba, K, Dracos, M, Drees, J, Dris, M, Dufour, Y, Dupont, F, Edsall, D, Eek, Lo, Eerola, Pam, Ehret, R, Ekelof, T, Ekspong, G, Peisert, Ae, Elsing, M, Engel, Jp, Ershaidat, N, Santo, Me, Fassouliotis, D, Feindt, M, Ferrer, A, Filippas, Ta, Firestone, A, Foeth, H, Fokitis, E, Fontanelli, F, Forbes, Kaj, Fousset, Jl, Francon, S, Franek, B, Frenkiel, P, Fries, Dc, Frodesen, Ag, Fruhwirth, R, Fuldaquenzer, F, Furstenau, H, Fuster, J, Gamba, D, Gandelman, M, Garcia, C, Garcia, J, Gaspar, C, Gasparini, U, Gavillet, P, Gazis, En, Gerber, Jp, Giacomelli, P, Gillespie, D, Gokieli, R, Golob, B, Golovatyuk, Vm, Cadenas, Jjgy, Gopal, G, Gorn, L, Gorski, M, Gracco, V, Grant, A, Grard, F, Graziani, E, Grosdidier, G, Gross, E, Grossetete, B, Gunnarsson, P, Guy, J, Haedinger, U, Hahn, F, Hahn, M, Hahn, S, Haider, S, Hajduk, Z, Hakansson, A, Hallgren, A, Hamacher, K, Demonchenault, Gh, Hao, W, Harris, Fj, Hedberg, V, Henkes, T, Henriques, R, Hernandez, Jj, Hernando, Ja, Herquet, P, Herr, H, Hessing, Tl, Hietanen, I, Higgins, Co, Higon, E, Hilke, Hj, Hill, Ts, Hodgson, Sd, Hofmokl, T, Holmgren, So, Holt, Pj, Holthuizen, D, Honore, Pf, Houlden, M, Hrubec, J, Huet, K, Hultqvist, K, Ioannou, P, Iversen, Ps, Jackson, Jn, Jacobsson, R, Jalocha, P, Jarlskog, G, Jarry, P, Jeanmarie, B, Johansson, Ek, Jonker, M, Jonsson, L, Juillot, P, Kalkanis, G, Kalmus, G, Kapusta, F, Karlsson, M, Karvelas, E, Katsanevas, S, Katsoufis, Ec, Keranen, R, Khomenko, Ba, Khovanski, Nn, King, B, Kjaer, Nj, Klein, H, Klovning, A, Kluit, P, Kochmehrin, A, Koehne, Jh, Koene, B, Kokkinias, P, Koratzinos, M, Korcyl, K, Korytov, Av, Kostioukhine, V, Kourkoumelis, C, Kouznetsov, O, Kramer, Ph, Krammer, M, Kreuter, C, Krolikowski, J, Kronkvist, I, Krupinski, W, Kucewicz, W, Kulka, K, Kurvinen, K, Lacasta, C, Lambropoulos, C, Lamsa, Jw, Lanceri, L, Langefeld, P, Lapin, V, Last, I, Laugier, Jp, Lauhakangas, R, Ledroit, F, Leitner, R, Lemoigne, Y, Lemonne, J, Lenzen, G, Lepeltier, V, Levy, Jm, Lieb, E, Liko, D, Lindgren, J, Lindner, R, Lipniacka, A, Lippi, I, Loerstad, B, Lokajicek, M, Loken, Jg, Lopezfernandez, A, Aguera, Mal, Los, M, Loukas, D, Lozano, Jj, Lutz, P, Lyons, L, Maehlum, G, Maillard, J, Maio, A, Maltezos, A, Mandl, F, Marco, J, Margoni, M, Marin, Jc, Mariotti, C, Markou, A, Maron, T, Marti, S, Martinezrivero, C, Martinezvidal, F, Matorras, F, Matteuzzi, C, Matthiae, G, Mazzucato, M, Mccubbin, M, Mckay, R, Mcnulty, R, Medbo, J, Meroni, C, Meyer, Wt, Michelotto, M, Mikulec, I, Mirabito, L, Mitaroff, Wa, Mitselmakher, Gv, Mjoernmark, U, Moa, T, Moeller, R, Moenig, K, Monge, Mr, Morettini, P, Mueller, H, Murray, Wj, Muryn, B, Myatt, G, Naraghi, F, Navarria, Fl, Negri, P, Nemecek, S, Neumann, W, Neumeister, N, Nicolaidou, R, Nielsen, Bs, Nikolaenko, V, Nilsen, Pes, Niss, P, Nomerotski, A, Novak, M, Obraztsov, V, Olshevski, Ag, Orava, R, Ostankov, A, Osterberg, K, Ouraou, A, Paganini, P, Paganoni, M, Pain, R, Palka, H, Papadopoulou, Td, Pape, L, Parodi, F, Passeri, A, Pegoraro, M, Pennanen, J, Peralta, L, Pernegger, H, Pernicka, M, Perrotta, A, Petridou, C, Petrolini, A, Piana, G, Pierre, F, Pimenta, M, Plaszczynski, S, Podobrin, O, Pol, Me, Polok, G, Poropat, P, Pozdniakov, V, Prest, Michela, Privitera, P, Pullia, A, Radojicic, D, Ragazzi, S, Rahmani, H, Ratoff, Pn, Read, Al, Reale, M, Rebecchi, P, Redaelli, Ng, Regler, M, Reid, D, Renton, Pb, Resvanis, Lk, Richard, F, Richardson, J, Ridky, J, Rinaudo, G, Romero, A, Roncagliolo, I, Ronchese, P, Ronnqvist, C, Rosenberg, Ei, Rosso, E, Roudeau, P, Rovelli, T, Ruckstuhl, W, Ruhlmannkleider, V, Ruiz, A, Saarikko, H, Sacquin, Y, Sajot, G, Salt, J, Sanchez, J, Sannino, M, Schael, S, Schneider, H, Schyns, Mae, Sciolla, G, Scuri, F, Segar, Am, Seitz, A, Sekulin, R, Sessa, M, Seufert, R, Shellard, Rc, Siccama, I, Siegrist, P, Simonetti, S, Simonetto, F, Sisakian, An, Skjevling, G, Smadja, G, Smirnov, N, Smirnova, O, Smith, Gr, Sosnowski, R, Souzasantos, D, Spassov, T, Spiriti, E, Squarcia, S, Staeck, H, Stanescu, C, Stapnes, S, Stavropoulos, G, Stichelbaut, F, Stocchi, A, Strauss, J, Straver, J, Strub, R, Stugu, B, Szczekowski, M, Szeptycka, M, Szymanski, P, Tabarelli, T, Tchikilev, O, Theodosiou, Ge, Tilquin, A, Timmermans, J, Timofeev, Vg, Tkatchev, Lg, Todorov, T, Toet, Dz, Toker, O, Tomaradze, A, Tome, B, Torassa, E, Tortora, L, Treille, D, Trischuk, W, Tristram, G, Troncon, C, Tsirou, A, Tsyganov, En, Turluer, Ml, Tuuva, T, Tyapkin, Ia, Tyndel, M, Tzamarias, S, Ueberschaer, B, Ueberschaer, S, Ullaland, O, Uvarov, V, Valenti, G, Vallazza, E, Ferrer, Jav, Vandervelde, C, Vanapeldoorn, Gw, Vandam, P, Vanderheijden, M, Vandoninck, Wk, Vaneldik, J, Vaz, P, Vegni, G, Ventura, L, Venus, W, Verbeure, F, Verlato, M, Vertogradov, Ls, Vilanova, D, Vincent, P, Vitale, L, Vlasov, E, Vodopyanov, As, Vollmer, M, Voutilainen, M, Vrba, V, Wahlen, H, Walck, C, Waldner, F, Wehr, A, Weierstall, M, Weilhammer, P, Wetherell, Am, Wickens, Jh, Wielers, M, Wilkinson, Gr, Williams, Wsc, Winter, M, Wormser, G, Woschnagg, K, Zaitsev, A, Zalewska, A, Zavrtanik, D, Zevgolatakos, E, Zimin, Ni, Zito, M, Zontar, D, Zuberi, R, Zumerle, G, and Zuniga, J.
Subjects: CP-VIOLATION, DECAYS, MESONS, Z(0), LEP, DELPHI, mixing in B0 system, b tagging
Published: 1994

13. MEASUREMENT OF THE E+E- -] GAMMA-GAMMA(GAMMA) CROSS-SECTION AT LEP ENERGIES

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALMEIDA, FML ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P and APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEGALLI, M BEILLIERE, P and BELTRAN, P BENVENUTI, AC BERGGREN, M BERTRAND, D and BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P BJARNE, J and BLOCH, D BLOCKI, J BLYTH, S BOCCI, V BOGOLUBOV, PN and BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL and BORISOV, G BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O and BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M and BRAIBANT, S BRANCHINI, P BRAND, KD BRENNE, RRA BRIAND, H and BRICMAN, C BRILLAULT, L BROWN, RCA BRUNET, JM BUGGE, L BURAN, T BUYS, A BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V and CANKOCAK, K CAO, F CARENA, F CARRILHO, P CARROLL, L and CASES, R CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR and CERRITO, L CHABAUD, V CHAN, A CHAPKIN, M CHARPENTIER, P and CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L and CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM CINDRO, V and COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G and COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G and MAESTRO, JC CZELLAR, S DAHLJENSEN, E DAHM, J DALMAGNE, B and DAM, M DAMGAARD, G DAUBIE, E DAUM, A DAUNCEY, PD and DAVENPORT, M DAVIES, J DASILVA, W DEFOIX, C DELPIERRE, P and DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W and DEBRABANDERE, S DECLERCQ, C DEFEZLASO, MDM DELAVAISSIERE, C and DELOTTO, B DEMIN, A DEPAULA, L DIJKSTRA, H and DICIACCIO, L DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DUPONT, F and EDSALL, D EEK, LO EHRET, R EKELOF, T EKSPONG, G and ELSING, M ENGEL, JP ERSHAIDAT, N SANTO, ME FALALEEV, V and FASSOULIOTIS, D FEINDT, M FERRER, A FILIPPAS, TA and FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORMENTI, F FOUSSET, JL FRANCON, S FRANKEL, B FRENKIEL, P and FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F and FURSTENAU, H FUSTER, J GAMBA, D GANDELMAN, M GARCIA, C and GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GILLESPIE, D GOLIELI, R and GOLOB, B GOLOVATYUK, VM CADENAS, JJG GOPAL, G GORN, L and GORSKI, M GRACCO, V GRARD, F GRAZIANI, E GROSDIDIER, G GROSSETETE, B GUNNARSSON, P GUY, J HAEDINGER, U and HAHN, F HAHN, M HAHN, S HAIDER, S HAJDUK, Z and HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH and HAO, W HARRIS, FJ HEDBERG, V HENRIQUES, R HERXNANDEZ, JJ and HERNANDO, JA HERQUET, P HERR, H HESSING, TL HIGON, E and HILKE, HJ HILL, TS HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HONORE, PF HOULDEN, M HRUBEC, J HUET, K HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JACOBSSON, R and JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JONKER, M JONSSON, L JUILLOT, P KAISER, M KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATARGIN, A and KATSANEVAS, S KATSOUFIS, EC KERANEN, R KHOMENKO, BA and KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A and KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P and KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIOUKHINE, V and KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KRAMMER, M and KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUPINSKI, W and KULKA, K KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LANGEFELD, P LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T and LEVY, JM LIEB, E LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G and MARIN, JC MARIOTTI, C MARKOU, A MARON, T MARTI, S and MARTINEZRIVERO, C MARTINEZVIDAL, F MATORRAS, F and MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C MEYER, WT and MICHELOTTO, M MIGLIORE, E MIKULEC, I MIRABITO, L and MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ and MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NEGRI, P and NEMECEK, S NEUMANN, W NEUMEISTER, N NICOLAIDOU, R and NIELSEN, BS NILSEN, PES NISS, P NOMEROTSKI, A NORMAND, A and OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTERBERG, K and OURAOU, A PAGANINI, P PAGANONI, M PAIN, R PALKA, H and PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O and POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PREST, M and PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REALE, M REBECCHI, P and REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, J RIDKY, J RINAUDO, G and ROMERO, A RONCAGLIOLO, J RONCHESE, P ROSENBERG, EI and ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H and SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M and SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F and SEGAR, AM SEITZ, A SEKULIN, R SESSA, M SEUFERT, R and SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S and SIMONETTO, F SISAKIAN, AN SKJEVLING, G SMADJA, G and SMIRNOV, N SMIRNOVA, O SMITH, GR SOSNOWSKI, R and SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVITSKI, I STAVROPOULOS, G and STEPANIAK, K STICHELBAUT, F STOCCHI, A STRAUSS, J and STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M and SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE and THOME, Z TILQUIN, A TIMMERMANS, J TIMOFEEV, VG and TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TOME, B and TORASSA, E TORTORA, L TREILLE, D TRISCHUK, W and TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M and TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M and TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O and UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M and VANDONINCK, WK VANELDIK, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS and VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H and WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P and WETHERELL, AM WICKENS, JH WIELERS, M WILKINSON, GR and WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K and YIP, K YUSHCHENKO, O ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R ZUMERLE, G
Abstract: The total and the differential cross sections for the reaction e+e- –> gammagamma(gamma) have been measured with the DELPHI detector at LEP using an integrated luminosity of 36.9 pb-1. The results agree with the QED predictions and consequently there is no evidence for non-standard channels with the same experimental signature. The lower limits obtained on the QED cutoff parameters are LAMBDA+ > 143 GeV and LAMBDA- > 120 GeV, and the lower bound on the mass of an excited electron with an effective coupling constant lambda(gamma) = 1 is 132 GeV/c2. Upper limits on the branching ratios for the decays Z0 –> gammagamma, Z0 –> pi0gamma, Z0 –> etagamma and Z0 –> gammagammagamma have been determined to be 5.5 x 10(-5), 5.5 x 10(-5), 8.0 x 10(-5), and 1.7 x 10-5 respectively. All the limits are at the 95% confidence level.
Published: 1994

14. MEASUREMENT OF THE B-0-(B)OVER-BAR-0 MIXING PARAMETER IN DELPHI

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALMEIDA, FML ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P and APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEGALLI, M BEILLIERE, P and BELTRAN, P BENVENUTI, AC BERGGREN, M BERTRAND, D and BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P BJARNE, J and BLOCH, D BLOCKI, J BLYTH, S BOCCI, V BOGOLUBOV, PN and BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL and BORISOV, G BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O and BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M and BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H and BRICMAN, C BRILLAULT, L BROWN, RCA BRUNET, JM BUGGE, L BURAN, T BUYS, A BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V and CANKOCAK, K CAO, F CARENA, F CARRILHO, P CARROLL, L and CASES, R CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR and CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P CHAUVEAU, J and CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P and CHOROWICZ, V CHRIN, JTM CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S and DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G and DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVIES, J and DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S DECLERCQ, C and LASO, MDMD DELAVAISSIERE, C DELOTTO, B DEMIN, A DEPAULA, L DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DUPONT, F EDSALL, D EHRET, R EKELOF, T and EKSPONG, G ELSING, M ENGEL, JP ERSHAIDAT, N SANTO, ME and FALALEEV, V FASSOULIOTIS, D FEINDT, M FENYUK, A and FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORMENTI, F FOUSSET, JL FRANCON, S and FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG and FULDAQUENZER, F FURSTENAU, H FUSTER, J GAMBA, D and GANDELMAN, M GARCIA, C GARCIA, J GASPAR, C GASPARINI, U and GAVILLET, P GAZIS, EN GELE, D GERBER, JP GIACOMELLI, P GILLESPIE, D GOKIELI, R GOLOB, B GOLOVATYUK, VM and CADENAS, JJGY GOPAL, G GORN, L GORSKI, M GRACCO, V and GRARD, F GRAZIANI, E GROSDIDIER, G GUNNARSSON, P GUY, J and HAEDINGER, U HAHN, F HAHN, M HAHN, S HAIDER, S and HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K and DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V and HENRIQUES, R HERNANDEZ, JJ HERNANDO, JA HERQUET, P HERR, H HESSING, TL HIGON, E HILKE, HJ HILL, TS HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HONORE, PF HOULDEN, M and HRUBEC, J HUET, K HULTQVIST, K IOANNOU, P IVERSEN, PS and JACKSON, JN JACOBSSON, R JALOCHA, P JARLSKOG, G and JARRY, P JEANMARIE, B JOHANSSON, EK JONKER, M JONSSON, L and JUILLOT, P KAISER, M KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R and KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H and KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORCYL, K KORYTOV, AV and KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH and KRAMMER, M KREUTER, C KROLIKOWSKI, J KRONKVIST, I and KRUPINSKI, W KULKA, K KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LANGEFELD, P LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R LEDER, G and LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G and LEPELTIER, V LESIAK, T LEVY, JM LIEB, E LIKO, D and LINDNER, R LIPNIACKA, A LIPPI, I LERSTAD, B LOKAJICEK, M and LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M and LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G and MAILLARD, J MAIO, A MALTEZOS, A MANDL, F MARCO, J and MARECHAL, B MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A and MARON, T MARTI, S MARTINEZRIVERO, C MARTINEZVIDAL, F and MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M and MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C and MEYER, WT MICHELOTTO, M MIGLIORE, E MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL and NEGRI, P NEMECEK, S NEUMANN, W NEUMEISTER, N and NICOLAIDOU, R NIELSEN, BS NIKOLAENKO, V NILSEN, PES and NISS, P NOMEROTSKI, A NORMAND, A NOVAK, M OBRAZTSOV, V and OLSHEVSKI, AG ORAVA, R OSTERBERG, K OURAOU, A and PAGANINI, P PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M and PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O and POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PREST, M and PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REALE, M REBECCHI, P REDAELLI, NG REGLRE, M REID, D RENTON, PB RESVANIS, LK and RICHARD, F RICHARDSON, J RIDKY, J RINAUDO, G ROMERO, A and RONCAGLIOLO, I RONCHESE, P ROOS, L ROSENBERG, EI and ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTRUHL, W and RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H and SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M and SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F and SEGAR, AM SEITZ, A SEKULIN, R SESSA, M SEUFERT, R and SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S and SIMONETTO, F SISAKIAN, AN SKJEVLING, G SMADJA, G and SMIRNOV, N SMIRNOVA, O SMITH, GR SOSNOWSKI, R and SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVITSKI, I STAVROPOULOS, G and STEPANIAK, K STICHELBAUT, F STOCCHI, A STRAUSS, J and STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M and TABARELLI, T TCHILKILEV, O THEODOSIOU, GE THOME, Z and TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG and TODOROV, T TOET, DZ TOMARADZE, A TOME, B TORASSA, E and TORTORA, L TRANSTROMER, G TREILLE, D TRISCHUK, W and TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M and TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M and TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O and UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M and VANDONINCK, WK VANELDIK, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS and VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H and WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P and WETHERELL, AM WICKENS, JH WIELERS, M WILKINSON, GR and WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K and YIP, K YUSHCHENKO, O ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R ZUMERLE, G
Subjects: High Energy Physics::Experiment
Abstract: A total of about 900000 Z0 –> qqBAR decays have been analyzed to measure the B0 - B0BAR mixing probability. Two different b tagging techniques have been used: events with two leptons and events with one lepton and one LAMBDA. From a combination of the two methods the average mixing parameter, chi, was determined to be (12.1 +/- 1.6(stat.) +/- 0.4(syst.) +/- 0.4(model))%.
Published: 1994

15. MEASUREMENTS OF THE LINESHAPE OF THE Z(0) AND DETERMINATION OF ELECTROWEAK PARAMETERS FROM ITS HADRONIC AND LEPTONIC DECAYS

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R and ALEKSEEV, GD ALLPORT, P ALMEHED, S ALMEIDA, FML and ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEGALLI, M BEILLIERE, P and BELOKOPYTOV, Y BELTRAN, P BENVENUTI, AC BERGGREN, M and BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P and BJARNE, J BLOCH, D BLOCKI, J BLYTH, S BOCCI, V and BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W and BOOTH, PSL BORISOV, G BOSIO, C BOSTJANCIC, B BOSWORTH, S and BOTNER, O BOUDINOV, E BOUQUET, B BOURDARIOS, C and BOWCOCK, TJV BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD and BRENNER, RA BRIAND, H BRICMAN, C BRILLAULT, L BROWN, RCA BRUCKMAN, P BRUNET, JM BUDZIAK, A BUGGE, L and BURAN, T BUYS, A BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CANKOCAK, K and CAO, F CARENA, F CARRILHO, P CARROLL, L CASES, R and CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L and CHABAUD, V CHAN, A CHARPENTIER, P CHAUVEAU, J and CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P and CHOROWICZ, V CHRIN, JTM CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S and DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G and DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVIES, J and DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S DECLERCQ, C and LASO, MDMD DELAVAISSIERE, C DELOTTO, B DEMIN, A DEPAULA, L DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DUPONT, F EDSALL, D EEK, LO EHRET, R and EKELOF, T EKSPONG, G PEISERT, AE ELSING, M ENGEL, JP and ERSHAIDAT, N SANTO, ME FALALEEV, V FASSOULIOTIS, D and FEINDT, M FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H and FOKITIS, E FONTANELLI, F FORBES, KAJ FORMENTI, F and FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC and FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURSTENAU, H and FUSTER, J GAMBA, D GANDELMAN, M GARCIA, C GARCIA, J and GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GILLESPIE, D GOKIELI, R GOLOB, B and GOLOVATYUK, VM CADENAS, JJGY GOPAL, G GORN, L GORSKI, M and GRACCO, V GRARD, F GRAZIANI, E GROSDIDIER, G and GROSSETETE, B GUNNARSSON, P GUY, J HAEDINGER, U HAHN, F and HAHN, M HAHN, S HAIDER, S HAJDUK, Z HAKANSSON, A and HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENRIQUES, R HERNANDEZ, JJ HERNANDO, JA and HERQUET, P HERR, H HESSING, TL HIGGINS, CO HIGON, E and HILKE, HJ HILL, TS HODGSON, SD HOFMOKL, T HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HONORE, PF HOULDEN, M and HRUBEC, J HUET, K HULTQVIST, K IOANNOU, P IVERSEN, PS and JACKSON, JN JACOBSSON, R JALOCHA, P JARLSKOG, G and JARRY, P JEANMARIE, B JOHANSSON, EK JONKER, M JONSSON, L and JUILLOT, P KAISER, M KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P KOCHMEHRIN, A and KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KRAMMER, M KREUTER, C KROLIKOWSKI, J KRONKVIST, I and KUCEWICZ, W KULKA, K KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LANGEFELD, P LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R LEDER, G and LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G and LEPELTIER, V LEVY, JM LIEB, E LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG and LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MAIO, A and MALTEZOS, A MANDL, F MARCO, J MARECHAL, B MARGONI, M and MARIN, JC MARIOTTI, C MARKOU, A MARON, T MARTI, S and MARTINEZRIVERO, C MARTINEZVIDAL, F MATORRAS, F and MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C MEYER, WT and MICHELOTTO, M MIGLIORE, E MIKULEC, I MIRABITO, L and MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL and NEGRI, P NEMECEK, S NEUMANN, W NEUMEISTER, N and NICOLAIDOU, R NIELSEN, BS NIKOLAENKO, V NILSEN, PES and NISS, P NOMEROTSKI, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANINI, P and PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L and PARODI, F PASSERI, A PEGORARO, M PENNANEN, J and PERALTA, L PERNEGGER, H PERNICKA, M PERROTTA, A and PETRIDOU, C PETROLINI, A PIANA, G PIERRE, F PIMENTA, M and PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G and POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P PULLIA, A and RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REALE, M REBECCHI, P REDAELLI, NG and REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F and RICHARDSON, J RIDKY, J RINAUDO, G ROMERO, A RONCAGLIOLO, I RONCHESE, P ROSENBERG, EI ROSSO, E ROUDEAU, P and ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A and RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J and SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE and SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A SEKULIN, R and SESSA, M SEUFERT, R SHELLARD, RC SICCAMA, I and SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN and SKJEVLING, G SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR and SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T SPIRITI, E and SQUARCIA, S STAECK, H STANESCU, C STAPNES, S and STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J and STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M and SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE and THOME, Z TILQUIN, A TIMMERMANS, J TIMOFEEV, VG and TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TOME, B and TORASSA, E TORTORA, L TREILLE, D TRISCHUK, W and TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M and TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M and TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O and UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M and VANDONINCK, WK VANELDIK, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS and VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H and WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P and WETHERELL, AM WICKENS, JH WIELERS, M WILKINSON, GR and WILLIAMS, WSC WINTER, M WORMSER, G WOSCHNAGG, K ZAITSEV, A ZALEWSKA, A ZANINI, L ZAVRTANIK, D ZEVGOLATAKOS, E and ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R ZUMERLE, G
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: During the LEP running periods in 1990 and 1991 DELPHI has accumulated approximately 450000 Z0 decays into hadrons and charged leptons. The increased event statistics coupled with improved analysis techniques and improved knowledge of the LEP beam energies permit significantly better measurements of the mass and width of the Z0 resonance. Model independent fits to the cross sections and leptonic forward-backward asymmetries yield the following Z0 parameters: the mass and total width M(Z) = 91.187 +/- 0.009 GeV, GAMMA(Z) = 2.486 +/- 0.012 GeV, the hadronic and leptonic partial widths GAMMA(had) = 1.725 +/- 0.012GeV, GAMMA(l) = 83.01 +/- 0.52 MeV, the invisible width GAMMA(inv) = 512 +/- 10 MeV, the ratio of hadronic to leptonic partial widths R(l) = 20.78 +/- 0.15, and the Born level hadronic peak cross section sigma0 = 40.90 +/- 0.28 nb. Using these results and the value of alpha(s) determined from DELPHI data, the number of light neutrino species is determined to be 3.08 +/- 0.05. The individual leptonic widths are found to be: GAMMA(e) = 82.93 +/- 0.70 MeV, GAMMA(mu) = 83.20 +/- 1.11 MeV and GAMMA(tau) = 82.89 +/- 1.31 MeV. Using the measured leptonic forward-backward asymmetries and assuming lepton universality, the squared vector and axial-vector couplings of the Z0 to charged leptons are found to be g(V)l2 = (1.47 +/- 0.51) x 10(-3) and g(A)l2 = 0.2483 +/- 0.0016. A full Standard Model fit to the data yields a value of the top mass m(t) = 115(-82)+52 (expt.)-24(+23) (Higgs) GeV, corresponding to a value of the weak mixing angle sin2 theta(eff)lept = 0.2339 +/- 0.0015(expt.)-0.0004(+0.0001) (Higgs). Values are obtained for the variables S and T, or epsilon1 and epsilon3 which parameterize electroweak loop effects.
Published: 1994

16. J/PSI-PRODUCTION IN THE HADRONIC DECAYS OF THE Z

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALMEIDA, FML ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P and APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BAUDOT, J BECKS, KH BEGALLI, M and BEILLIERE, P BELTRAN, P BENVENUTI, AC BERGGREN, M and BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P and BJARNE, J BLOCH, D BLOCKI, J BLYTH, S BOCCI, V and BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W and BOOTH, PSL BORISOV, G BOSIO, C BOSTJANCIC, B BOSWORTH, S and BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV and BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA and BRIAND, H BRICMAN, C BRILLAULT, L BROWN, RCA and BRUCKMAN, P BRUNET, JM BUGGE, L BURAN, T BUYS, A and BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, R and CAMPORESI, T CANALE, V CANKOCAK, K CAO, F CARENA, F and CARRILHO, P CARROLL, L CASES, R CASO, C GIMENEZ, MVC and CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A and CHAPKIN, M CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J and CHECCHIA, P CHELKOV, GA CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R and CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S DAHLJENSEN, E and DAHM, J DALMAGNE, B DAM, M DAMGAARD, G DAUBIE, E and DAUM, A DAUNCEY, PD DAVENPORT, M DAVIES, J DASILVA, W and DEFOIX, C DELPIERRE, P DEMARIA, N DEANGELIS, A and DEBOECK, H DEBOER, W DEBRABANDERE, S DECLERCQ, C LASO, MDMD DELAVAISSIERE, C DELOTTO, B DEMIN, A DEPAULA, L and DESAINTJEAN, C DIJKSTRA, H DICIACCIO, L DJAMA, F and DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J and DRIS, M DUFOUR, Y DUPONT, F EDSALL, D EHRET, R and EKELOF, T EKSPONG, G ELSING, M ENGEL, JP ERSHAIDAT, N and SANTO, ME FASSOULIOTIS, D FEINDT, M FERRER, A and FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORMENTI, F FOUSSET, JL FRANEK, B and FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R and FULDAQUENZER, E FURSTENAU, H FUSTER, J GAMBA, D and GANDELMAN, M GARCIA, C GARCIA, J GASPAR, C GASPARINI, U and GAVILLET, P GAZIS, EN GELE, D GERBER, JP GIACOMELLI, P GILLESPIE, D GOKIELI, R GOLOB, B GOLOVATYUK, VM and CADENAS, JJGY GOPAL, G GORN, L GORSKI, M GRACCO, V and GRARD, F GRAZIANI, E GROSDIDIER, G GUNNARSSON, P GUY, J and HAEDINGER, U HAHN, F HAHN, M HAHN, S HAIDER, S and HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K HAO, W and HARRIS, FJ HEDBERG, V HENRIQUES, R HERNANDEZ, JJ and HERNANDO, JA HERQUET, P HERR, H HESSING, TL HIGON, E and HILKE, HJ HILL, TS HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D and HONORE, PF HOULDEN, M HUET, K HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JACOBSSON, R JALOCHA, P and JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JONKER, M JONSSON, L JUILLOT, P KAISER, M KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATARGIN, A KATSANEVAS, S and KATSOUFIS, EC KERANEN, R KHOMENKO, BA KHOVANSKI, NN and KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P and KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P and KORATZINOS, M KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C and KOUZNETSOV, O KRAMER, PH KRAMMER, M KREUTER, C and KROLIKOWSKI, J KRONKVIST, I KRUPINSKI, W KUCEWICZ, W and KULKA, K KURVINEN, K LACASTA, C LAKTINEH, I and LAMBROPOULOS, C LAMSA, JW LANCERI, L LANGEFELD, P LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R LEDER, G and LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G and LEPELTIER, V LESIAK, T LEVY, JM LIEB, E LIKO, D and LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M and LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G and MAILLARD, J MAIO, A MALTEZOS, A MANDL, F MARCO, J and MARECHAL, B MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A and MARON, T MARTI, S MARTINEZRIVERO, C MARTINEZVIDAL, F and MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M and MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C and MEYER, WT MICHELOTTO, M MIGLIORE, E MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL and NEGRI, P NEMECEK, S NEUMANN, W NEUMEISTER, N and NICOLAIDOU, R NIELSEN, BS NIKOLAENKO, V NISS, P and NOMEROTSKI, A NORMAND, A OBRAZTSOV, V OLSHEVSKI, AG and ORAVA, R OSTERBERG, K OURAOU, A PAGANINI, P PAGANONI, M and PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F and PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L and PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C and PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F PIMENTA, M and PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G and POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P PULLIA, A and RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REALE, M REBECCHI, P REDAELLI, NG and REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F and RICHARDSON, J RIDKY, J RINAUDO, G RIPP, I ROMERO, A and RONCAGLIOLO, I RONCHESE, P ROOS, L ROSENBERG, EI ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V and RUIZ, A SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J and SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE and SCIOLLA, G SCURI, E SEGAR, AM SEITZ, A SEKULIN, R and SESSA, M SEUFERT, R SHELLARD, RC SICCAMA, I and SIEGTIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN and SKAALI, TB SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR and SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T SPIRITI, E and SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVITSKI, I STAVROPOULOS, G STEPANIAK, K STICHELBAUT, F STOCCHI, A and STRAUSS, J STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M TABARELLI, T TCHIKILEV, O THEODOSIOU, GE and THOME, Z TILQUIN, A TIMMERMANS, J TIMOFEEV, VG and TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TOME, B and TORASSA, E TORTORA, L TRANSTROMER, G TREILLE, D and TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M and TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O and UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M and VANDONINCK, WK VANELDIK, D VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS and VILANOVA, D VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P WETHERELL, AM and WICKENS, JH WIELERS, M WILKINSON, GR WILLIAMS, WSC and WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YIP, K and YUSHCHENKO, O ZACH, F ZAITSEV, A ZALEWSKA, A ZALEWSKI, P and ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI ZITO, NM and ZONTAR, D ZUBERI, R ZUMERLE, G
Subjects: High Energy Physics::Experiment, Astrophysics::Cosmology and Extragalactic Astrophysics, Nuclear Experiment
Abstract: J/psi mesons have been reconstructed from their decay to mu(+)mu(-) and e(+)e(-), using the data collected by the DELPHI experiment during 1991 and 1992 at the LEP collider. From about 1 million hadronic Z decays 153 +/- 17 J/psi were found, 5.4 +/- 2.3 psi’ were obtained in the channel J/psi(–> mu(+)mu(-))pi(+)pi(-) and 6.4 +/- 2.7 chi(c) in the channel J/psi(–> mu(+)mu(-))gamma. As the dominant source of J/psi mesons is from b quarks, the following branching ratios: Br(b–>J/psi X) = (1.12 +/- 0.12 (stat.) +/- 0.10 (syst.))%, Br(b –> psi’ X) = (0.48 +/- 0.22 (stat.) +/- 0.10 (syst.))%, Br(b–>chi(cl) X) = (1.4 +/- 0.6 (stat.)(-0.2)(+0.4) (syst.))% were measured. From the proper time distribution of the J/psi sample, the average lifetime of b-hadrons decaying into J/psi was found to be: tau(B) = 1.50(-0.21)(+0.24) (stat.) +/- 0.03 (syst.) ps. A search for completely reconstructed B meson decays to final states including a J/psi gave a signal of 15 +/- 5 events.
Published: 1994

17. SEARCH FOR THE STANDARD MODEL HIGGS-BOSON IN Z(0) DECAYS

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALMEIDA, FML ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P and APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BAKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEGALLI, M BEILLIERE, P and BELTRAN, P BENVENUTI, AC BERGGREN, M BERTRAND, D and BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P BJARNE, J and BLOCH, D BLOCKI, J BLYTH, S BOCCI, V BOGOLUBOV, PN and BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL and BORISOV, G BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O and BOUDINOV, E BOUQUET, B BOURDARIOS, C BOWCOCK, TJV and BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA and BRIAND, H BRICMAN, C BRILLAULT, L BROWN, RCA BRUNET, JM BUGGE, L BURAN, T BUYS, A BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, R CAMPORESI, T and CANALE, V CANKOCAK, K CAO, F CARENA, F CARRILHO, P and CARROLL, L CASES, R CASO, C GIMENEZ, MVC CATTAI, A and CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHAPKIN, M and CHARPENTIER, P CHAUVEAU, J CHECCHIA, P CHELKOV, GA and CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM and CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D and CROSETTI, G MAESTRO, JC CZELLAR, S DAHLJENSEN, E DAHM, J and DALMAGNE, B DAM, M DAMGAARD, G DAUBIE, E DAUM, A and DAUNCEY, PD DAVENPORT, M DAVIES, J DASILVA, W DEFOIX, C and DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H and DEBOER, W DEBRABANDERE, S DECLERCQ, C LASO, MDMD and DELAVAISSIERE, C DELOTTO, B DEMIN, A DEPAULA, L and DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DUPONT, F EDSALL, D EHRET, R EKELOF, T and EKSPONG, G ELSING, M ENGEL, JP ERSHAIDAT, N SANTO, ME and FASSOULIOTIS, D FEINDT, M FERRER, A FILIPPAS, TA and FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORMENTI, F FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P and FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F and FURSTENAU, H FUSTER, J GAMBA, D GANDELMAN, M GARCIA, C and GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GELE, D GERBER, JP GIACOMELLI, P GILLESPIE, D and GOKIELI, R GOLOB, B GOLOVATYUK, VM CADENAS, JJGY GOPAL, G GORN, L GORSKI, M GRACCO, V GRARD, F GRAZIANI, E and GROSDIDIER, G GUNNARSSON, P GUY, J HAEDINGER, U and HAHN, F HAHN, M HAHN, S HAIDER, S HAJDUK, Z and HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH and HAO, W HARRIS, FJ HEDBERG, V HENRIQUES, R HERNANDEZ, JJ and HERNANDO, JA HERQUET, P HERR, H HESSING, TL HIGON, E and HILKE, HJ HILL, TS HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HONORE, PF HOULDEN, M HRUBEC, J HUET, K HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JACOBSSON, R and JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JONKER, M JONSSON, L JUILLOT, P KAISER, M KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S and KATSOUFIS, EC KERANEN, R KHOMENKO, BA KHOVANSKI, NN and KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P and KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P and KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIOUKHINE, V and KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KRAMMER, M and KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUPINSKI, W and KULKA, K KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LANGEFELD, P LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T and LEVY, JM LIEB, E LIKO, D LINDNER, R LIPNIACKA, A and LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG and LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MAIO, A and MALTEZOS, A MANDL, F MARCO, J MARECHAL, B MARGONI, M and MARIN, JC MARIOTTI, C MARKOU, A MARON, T MARTI, S and MARTINEZRIVERO, C MARTINEZVIDAL, F MATORRAS, F and MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C MEYER, WT and MICHELOTTO, M MIGLIORE, E MIKULEC, I MIRABITO, L and MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL and NEGRI, P NEMECEK, S NEUMANN, W NEUMEISTER, N and NICOLAIDOU, R NIELSEN, BS NIKOLAENKO, V NILSEN, PES and NISS, P NOMEROTSKI, A NORMAND, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTERBERG, K OURAOU, A PAGANINI, P and PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L and PARODI, F PASSERI, A PEGORARO, M PENNANEN, J and PERALTA, L PERNEGGER, H PERNICKA, M PERROTTA, A and PETRIDOU, C PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F and PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O POL, ME and POLOK, G POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P and PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REALE, M REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK and RICHARD, F RICHARDSON, J RIDKY, J RINAUDO, G ROMERO, A and RONCAGLIOLO, I RONCHESE, P ROOS, L ROSENBERG, EI and ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H and SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M and SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F and SEGAR, AM SEITZ, A SEKULIN, R SESSA, M SEUFERT, R and SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S and SIMONETTO, F SISAKIAN, AN SKJEVLING, G SMADJA, G and SMIRNOV, N SMIRNOVA, O SMITH, GR SOSNOWSKI, R and SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVITSKI, I STAVROPOULOS, G and STEPANIAK, K STICHELBAUT, F STOCCHI, A STRAVER, J and STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M TABARELLI, T TCHIKILEV, O THEODOSIOU, GE THOME, Z TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TOME, B TORASSA, E TORTORA, L and TREILLE, D TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A and TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P and VANDERHEIJDEN, M VANDONINCK, WK VANELDIK, J VAZ, P and VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M and VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V and WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M and WEILHAMMER, P WETHERELL, AM WICKENS, JH WIELERS, M and WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YIP, K YUSHCHENKO, O ZAITSEV, A and ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E and ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R ZUMERLE, G
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: A search for the Standard Model Higgs boson was performed in the data sample of around 1 million hadronic Z0 decays recorded in 1991 and 1992 with the DELPHI detector at LEP. The Higgs boson was searched for through its production in association with either neutrinos, electrons or muons. Four low mass events remain after the selections in the charged leptonic channels, that are likely to be due to background, especially four fermion processes. These results restrict the mass of the Standard Model Higgs boson to be larger than 55.7 GeV/c2 at the 95% confidence level.
Published: 1994

18. Measurement of time-dependent B-D(0) (B)over-bar-D(0) mixing

Author: ABREU, P, ADAM, W, ADYE, T, AGASI, E, AJINENKO, I, ALEKSAN, R, ALEKSEEV, G, ALLPORT, P, ALMEHED, S, ALMEIDA, F, ALVSVAAG, S, AMALDI, U, ANDREAZZA, A, ANTILOGUS, P, APEL, W, APSIMON, R, ARNOUD, Y, ASMAN, B, AUGUSTIN, J, AUGUSTINUS, A, BAILLON, P, BAMBADE, P, BARAO, F, BARATE, R, BARDIN, D, BARKER, G, BARONCELLI, A, BARRING, O, BARRIO, J, BARTL, W, BATES, M, BATTAGLIA, M, BAUBILLIER, M, BAUDOT, J, BECKS, K, BEGALLI, M, BEILLIERE, P, BELOUS, K, BELTRAN, P, BENVENUTI, A, BERGGREN, M, BERTRAND, D, BIANCHI, F, BIGI, M, BILENKY, M, BILLOIR, P, BJARNE, J, BLOCH, D, BLOCKI, J, BLYTH, S, BOCCI, V, BOGOLUBOV, P, BOLOGNESE, T, BONESINI, M, BONIVENTO, W, BOOTH, P, BORISOV, G, BOSIO, C, BOSTJANCIC, B, BOSWORTH, S, BOTNER, O, BOUQUET, B, BOURDARIOS, C, BOWCOCK, T, BOZZO, M, BRAIBANT, S, BRANCHINI, P, BRAND, K, BRENNER, R, BRIAND, H, BRICMAN, C, BRILLAULT, L, BROWN, R, BRUCKMAN, P, BRUNET, J, BUGGE, L, BURAN, T, BUYS, A, CACCIA, M, CALVI, M, ROZAS, A, CAMPION, R, CAMPORESI, T, CANALE, V, CANKOCAK, K, CAO, F, CARENA, F, CARRILHO, P, CARROLL, L, CASES, R, CASO, C, GIMENEZ, M, CATTAI, A, CAVALLO, E, CERRITO, L, CHABAUD, V, CHAN, A, CHARPENTIER, P, CHAUSSARD, L, CHAUVEAU, J, CHECCHIA, P, CHELKOV, G, CHLIAPNIKOV, P, CHOROWICZ, V, CHRIN, J, CINDRO, V, COLLINS, P, CONTRERAS, J, CONTRI, R, CORTINA, E, COSME, G, COSSUTTI, F, COUCHOT, F, CRAWLEY, H, CRENNELL, D, CROSETTI, G, MAESTRO, J, CZELLAR, S, DAHLJENSEN, E, DAHM, J, DALMAGNE, B, DAM, M, DAMGAARD, G, DAUBIE, E, DAUM, A, DAUNCEY, P, DAVENPORT, M, DAVIES, J, DASILVA, W, DEFOIX, C, DELLARICCA, G, DELPIERRE, P, DEMARIA, N, DEANGELIS, A, DEBOECK, H, DEBOER, W, DEBRABANDERE, S, DECLERCQ, C, LASO, M, LAVAISSIERE, C, DELOTTO, B, DEMIN, A, DEPAULA, L, DESAINTJEAN, C, DIJKSTRA, H, DICIACCIO, L, DJAMA, F, DOLBEAU, J, DONSZELMANN, M, DOROBA, K, DRACOS, M, DREES, J, DRIS, M, DUFOUR, Y, DUPONT, E, EDSALL, D, EHRET, R, EKELOF, T, EKSPONG, G, ELSING, M, ENGEL, J, ERSHAIDAT, N, SANTO, M, FASSOULIOTIS, D, FEINDT, M, FERRER, A, FILIPPAS, T, FIRESTONE, A, FOETH, H, FOKITIS, E, FONTANELLI, E, FORMENTI, F, FOUSSET, J, FRANEK, B, FRENKIEL, P, FRIES, D, FRODESEN, A, FRUHWIRTH, R, FULDAQUENZER, F, FURSTENAU, H, FUSTER, J, GAMBA, D, GANDELMAN, M, GARCIA, C, GARCIA, J, GASPAR, C, GASPARINI, U, GAVILLET, P, GAZIS, E, GELE, D, GERBER, J, GILLESPIE, D, GOKIELI, R, GOLOB, B, GOLOVATYUK, V, GOMEZ, J, CADENAS, Y, GOPAL, G, GORN, L, GORSKI, M, GRACCO, V, GRARD, F, GRAZIANI, E, GROSDIDIER, G, GUNNARSSON, P, GUY, J, HAEDINGER, U, HAHN, F, HAHN, S, HAIDER, S, HAJDUK, Z, HAKANSSON, A, HALLGREN, A, HAMACHER, K, HAO, W, HARRIS, F, HEDBERG, V, HENRIQUES, R, HERNANDEZ, J, HERNANDO, J, HERQUET, P, HERR, H, HESSING, T, HIGON, E, HILKE, H, HILL, T, HOLMGREN, S, HOLT, P, HOLTHUIZEN, D, HONORE, P, HOULDEN, M, HRUBEC, J, HUET, K, HULTQVIST, K, IOANNOU, P, IVERSEN, P, JACKSON, J, JACOBSSON, R, JALOCHA, P, JARLSKOG, G, JARRY, P, JEANMARIE, B, JOHANSSON, E, JONSSON, L, JUILLOT, P, KAISER, M, KALMUS, G, KAPUSTA, F, KARLSSON, M, KARVELAS, E, KATARGIN, A, KATSANEVAS, S, KATSOUFIS, E, KERANEN, R, KHOMENKO, B, KHOVANSKI, N, KING, B, KJAER, N, KLEIN, H, KLOVNING, A, KLUIT, P, KOCHMEHRIN, A, KOEHNE, J, KOENE, B, KOKKINIAS, P, KORATZINOS, M, KORYTOV, A, KOSTIOUKHINE, V, KOURKOUMELIS, C, KOUZNETSOV, O, KRAMER, P, KRAMMER, M, KREUTER, C, KROLIKOWSKI, J, KRONKVIST, I, KRUPINSKI, W, KUCEWICZ, W, KULKA, K, KURVINEN, K, LACASTA, C, LAKTINEH, I, LAMBROPOULOS, C, LAMSA, J, LANCERI, L, LANGEFELD, P, LAPIN, V, LAST, I, LAUGIER, J, LAUHAKANGAS, R, LEDER, G, LEDROIT, F, LEITNER, R, LEMOIGNE, Y, LEMONNE, J, LENZEN, G, LEPELTIER, V, LESIAK, T, LEVY, J, LIEB, E, LIKO, D, LINDNER, R, LIPNIACKA, A, LIPPI, I, LOERSTAD, B, LOKAJICEKJ, M, LOKEN, J, LOPEZFERNANDEZ, A, AGUERA, M, LOS, M, LOUKAS, D, LOZANO, J, LUTZ, P, LYONS, L, MAEHLUM, G, MAILLARD, J, MAIO, A, MALTEZOS, A, MANDL, F, MARCO, J, MARECHAL, B, MARGONI, M, MARIN, J, MARIOTTI, C, MARKOU, A, MARON, T, MARTI, S, MARTINEZRIVERO, C, MARTINEZVIDAL, F, MATORRAS, F, MATTEUZZI, C, MATTHIAE, G, MAZZUCATO, M, MCCUBBIN, M, MCKAY, R, MCNULTY, R, MEDBO, J, MERONI, C, MEYER, W, MICHELOTTO, M, MIGLIORE, E, MIKULEC, I, MIRABITO, L, MITAROFF, W, MITSELMAKHER, G, MJOERNMARK, U, MOA, T, MOELLER, R, MOENIG, K, MONGE, M, MORETTINI, P, MUELLER, H, MURRAY, W, MURYN, B, MYATT, G, NARAGHI, F, NAVARRIA, F, NEGRI, P, NEMECEK, S, NEUMANN, W, NICOLAIDOU, R, NIELSEN, B, NIKOLAENKO, V, NISS, P, Nomerotski, A, NORMAND, A, OBRAZTSOV, V, OLSHEVSKI, A, ORAVA, R, OSTERBERG, K, OURAOU, A, PAGANINI, P, PAGANONI, M, PAIN, R, PALKA, H, PAPADOPOULOU, T, PAPE, L, PARODI, F, PASSERI, A, PEGORARO, M, PENNANEN, J, PERALTA, L, PEREVOZCHIKOV, V, PERNEGGER, H, PERNICKA, M, PERROTTA, A, PETRIDOU, C, PETROLINI, A, PHILLIPS, H, PIANA, G, PIERRE, F, PIMENTA, M, PLASZCZYNSKI, S, PODOBRIN, O, POL, M, POLOK, G, POROPAT, P, POZDNIAKOV, V, PREST, M, PRIVITERA, P, PULLIA, A, RADOJICIC, D, RAGAZZI, S, RAHMANI, H, RAMES, J, RATOFF, P, READ, A, REALE, M, REBECCHI, P, REDAELLI, N, REGLER, M, REID, D, RENTON, P, RESVANIS, L, RICHARD, F, RICHARDSON, J, RIDKY, J, RINAUDO, G, RIPP, I, ROMERO, A, RONCAGLIOLO, I, RONCHESE, P, ROOS, L, ROSENBERG, E, ROSSO, E, ROUDEAU, P, ROVELLI, T, RUCKSTUHL, W, RUHLMANNKLEIDER, V, RUIZ, A, SAARIKKO, H, SACQUIN, Y, SAJOT, G, SALT, J, SANCHEZ, J, SANNINO, M, SCHNEIDER, H, SCHYNS, M, SCIOLLA, G, SCURI, F, SEGAR, A, SEITZ, A, SEKULIN, R, SEUFERT, R, SHELLARD, R, SICCAMA, I, SIEGRIST, P, SIMONETTI, S, SIMONETTO, F, SISAKIAN, A, SKAALI, T, SMADJA, G, SMIRNOV, N, SMIRNOVA, O, SMITH, G, SOSNOWSKI, R, SOUZASANTOS, D, SPASSOV, T, SPIRITI, E, SQUARCIA, S, STAECK, H, STANESCU, C, STAPNES, S, STAVITSKI, I, STAVROPOULOS, G, STEPANIAK, K, STICHELBAUT, F, STOCCHI, A, STRAUSS, J, STRAVER, J, STRUB, R, STUGU, B, SZCZEKOWSKI, M, SZEPTYCKA, M, TABARELLI, T, TCHIKILEV, O, THEODOSIOU, G, THOME, Z, TILQUIN, A, TIMMERMANS, J, TIMOFEEV, V, TKATCHEV, L, TODOROV, T, TOET, D, TOMARADZE, A, TOME, B, TORASSA, E, TORTORA, L, TRANSTROMER, G, TREILLE, D, TRISCHUK, W, TRISTRAM, G, TRONCON, C, TSIROU, A, TSYGANOV, E, TURLUER, M, TUUVA, T, TYAPKIN, I, TYNDEL, M, TZAMARIAS, S, UEBERSCHAER, B, UEBERSCHAER, S, ULLALAND, O, UVAROV, V, VALENTI, G, VALLAZZA, E, FERRER, J, VANDERVELDE, C, VANAPELDOORN, G, VANDAM, P, VANDERHEIJDEN, M, VANDONINCK, W, VANELDIK, J, VEGNI, G, VENTURA, L, VENUS, W, VERBEURE, F, VERLATO, M, VERTOGRADOV, L, VILANOVA, D, VINCENT, P, VITALE, L, VLASOV, E, VODOPYANOV, A, VOLLMER, M, VOUTILAINEN, M, VRBA, V, WAHLEN, H, WALCK, C, WALDNER, F, WEHR, A, WEIERSTALL, M, WEILHAMMER, P, WETHERELL, A, WICKENS, J, WIELERS, M, WILKINSON, G, WILLIAMS, W, WINTER, M, WITEK, M, WORMSER, G, WOSCHNAGG, K, YIP, K, YUSHCHENKO, O, ZACH, F, ZAITSEV, A, ZALEWSKA, A, ZALEWSKI, P, ZAVRTANIK, D, ZEVGOLATAKOS, E, ZIMM, N, ZITO, M, ZONTAR, D, ZUBERI, R, and ZUMERLE, G
Subjects: DELPHI, B-d(0) mixing, b tagging
Abstract: The time dependent mixing of Bd0-B̄d0 mesons has been observed by using the correlations between the charge of D* mesons and the weighted mean charge of particles in each hemisphere. From a reconstructed D*± sample corresponding to about 1.7 million hadronic Z0 decays, the mass difference between the two Bd0 mass eigenstates has been measured to be Δm = 0.50±0.12 (stat.) ± 0.06 (syst.) (Latin small letter h with stroke sign)/ps or, converting into eV/c2: Δm = [3.29±0.79 (stat.) ± 0.39 (syst.)] 10-4 eV/c2.
Published: 1994

19. A SEARCH FOR LEPTON FLAVOR VIOLATION IN Z0 DECAYS

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD and ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G and BARDIN, DY BARKER, G BARONCELLI, A BARRING, O BARRIO, JA and BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y and BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M and BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J and BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P and BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S and BOTNER, O BOUDINOV, E BOUQUET, B BOURDARIOS, C and BOWCOCK, TJV BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD and BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H and BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, R and CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L and CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P CHAUSSARD, L and CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L and CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G and CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E and DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E and DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J and DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DERKAOUI, J DEANGELIS, A DEBOECK, H and DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N and DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H and DICIACCIO, L DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DUPONT, F and EEK, LO EROLA, PAM EHRET, R EKELOF, T EKSPONG, G and PEISERT, AE ENGEL, JP ERSHAIDAT, N FASSOULIOTIS, D and FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A and FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ and FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC and FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K and FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C GARCIA, J and GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM and CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V and GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E and GROSSEWIESMANN, P GROSSETETE, B GUY, J HAEDINGER, U and HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A and HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H and HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ and HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO and HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J and HUET, K HULTH, PO HULTQVIST, K IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G and JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M and JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN and KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A and KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P and KOPF, M KORCYL, K KORYTOV, AV KOSTIOUKHINE, V and KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J and KRONKVIST, I KRUENERMARQUIS, U KUCEWICZ, W KULKA, K and KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW and LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G and LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LEVY, JM LIEB, E LIKO, D and LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I and LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A and AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P and LYONS, L MAEHLUM, G MAILLARD, J MALTEZOS, A MANDL, F and MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T and MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G and MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I and MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U and MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MYATT, G NAVARRIA, FL NEGRI, P and NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P and OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A and OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H and PAPADOPOULOU, TD PAPE, L PASSERI, A PEGORARO, M and PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A and PETRIDOU, C PETROLINI, A PETROVYKH, L PETTERSEN, TE and PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S POL, ME and POLOK, G POROPAT, P PRIVITERA, P PULLIA, A and RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL and REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G and RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P and RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSI, U ROSSO, E and ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V and RUIZ, A SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J and SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHULZE, B and SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEKULIN, R and SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I and SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN and SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C and STAPNES, S STAVROPOULOS, G STICHELBAUT, F STOCCHI, A and STRAUSS, J STRAVER, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE and TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG and TODOROV, T TOET, DZ TOKER, O TORASSA, E TORTORA, L and TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURLUER, ML TUUVA, T and TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W and VERBEURE, F VERTOGRADOV, LS VILANOVA, D VINCENT, P and VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEHR, A WEIERSTALL, M WEILHAMMER, P and WERNER, J WETHERELL, AM WICKENS, JH WILKINSON, GR and WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K and YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Abstract: A search for lepton flavour violation through the decays Z0 –> emu, etau and mutau was made with the DELPHI detector at LEP, using a sample corresponding to an integrated luminosity of 11.2 pb-1. The number of candidates was consistent with the estimated background. The upper limit on the branching ratio (at 95% confidence level) for Z0 –> emu was 3.2 x 10(-5), for Z0 –> etau was 10.8 x 10(-5) and for Z0 –> mutau was 13.5 x 10(-5).
Published: 1993

20. Limits on the production of scalar leptoquarks from $Z^0$ decays at LEP

Author: Abreu, P., Adam, W., Adye, T., Agasi, E., Aleksan, R., Alekseev, G. D., Algeri, A., Allen, P., Almehed, S., Alvsvaag, S. J., Amaldi, U., Andreazza, A., Antilogus, P., Apel, W. D., Apsimon, R. J., Arnoud, Y., Asman, B., Augustin, J. E., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, D. Y., Barker, G. J., Baroncelli, A., Barring, O., Barrio, J. A., Bartl, W., Bates, M. J., Battaglia, M., Baubillier, M., Becks, K. H., Begalli, M., Beilliere, P., Belokopytov, Y., Beltran, P., Benedic, D., Benvenuti, A. C., Berggren, M., Bertrand, D., Bianchi, F., Bilenky, M. S., Billoir, P., Bjarne, J., Bloch, D., Blocki, J., Blyth, S., Bocci, V., Bogolubov, P. N., Bolognese, T., Bonesini, M., Bonivento, W., P. S. L., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Bosworth, S., Botner, O., Bouquet, B., Bourdarios, C., T. J. V., Bozzo, M., Braibant, S., Branchini, P., Brand, K. D., Brenner, R. A., Briand, H., Bricman, C., Brillault, L., R. C. A., Bruckman, P., Brunet, J. M., Budziak, A., Bugge, L., Buran, T., Burmeister, H., J. A. M., Caccia, M., Calvi, M., A. J. C., Campion, R., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., M. V. C., Cattai, A., Cavallo, F. R., Cerrito, L., Chabaud, V., Chan, A., Chapkin, M., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, G. A., Chevalier, L., Chliapnikov, P., Chorowicz, V., J. T. M., Cindro, V., Collins, P., Contreras, J. L., Contri, R., Cortina, E., Cosme, G., Couchot, F., Crawley, H. B., Crennell, D., Crosetti, G., Crozon, M., Maestro, J. C., Czellar, S., Dahljensen, E., Dalmagne, B., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Daum, A., Dauncey, P. D., Davenport, M., Davies, J., Dasilva, W., Defoix, C., Delpierre, P., Demaria, N., Deangelis, A., Deboeck, H., Deboer, W., Debrabandere, S., Declercq, C., M. D. M., Delavaissiere, C., Delotto, B., Demin, A., Dijkstra, H., Diciaccio, L., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Dupont, F., Edsall, D., Eek, L. O., P. A. M., Ehret, R., Ekelof, T., Ekspong, G., Peisert, A. E., Elsing, M., Engel, J. P., Ershaidat, N., Fassouliotis, D., Feindt, M., Ferrer, A., Filippas, T. A., Firestone, A., Foeth, H., Fokitis, E., Fontanelli, F., K. A. J., Fousset, J. L., Francon, S., Franek, B., Frenkiel, P., Fries, D. C., Frodesen, A. G., Fruhwirth, R., Fuldaquenzer, F., Furstenau, H., Fuster, J., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, Ugo, Gavillet, P., Gazis, E. N., Gerber, J. P., Giacomelli, P., Gillespie, D., Gokieli, R., Golob, B., Golovatyuk, V. M., J. J. G., Gopal, G., Gorn, L., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grossetete, B., Guy, J., Haedinger, U., Hahn, F., Hahn, M., Haider, S., Hakansson, A., Hallgren, A., Hamacher, K., Demonchenault, G. H., Hao, W., Harris, F. J., Hedberg, V., Henkes, T., Hernandez, J. J., Herquet, P., Herr, H., Hessing, T. L., Hietanen, I., Higgins, C. O., Higon, E., Hilke, H. J., Hodgson, S. D., Hofmokl, T., Holmgren, S. O., Holt, P. J., Holthuizen, D., Honore, P. F., Houlden, M., Hrubec, J., Huet, K., Hulth, P. O., Hultqvist, K., Ioannou, P., Iversen, P. S., Jackson, J. N., Jalocha, P., Jarlskog, G., Jarry, P., Jeanmarie, B., Johansson, E. K., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Kapusta, F., Karlsson, M., Karvelas, E., Katsanevas, S., Katsoufis, E. C., Keranen, R., Khomenko, B. A., Khovanski, N. N., King, B., Kjaer, N. J., Klein, H., Klovning, A., Kluit, P., Kochmehrin, A., Koehne, J. H., Koene, B., Kokkinias, P., Koratzinos, M., Korytov, A. V., Kostioukhine, V., Kourkoumelis, C., Kouznetsov, O., Kramer, P. H., Krammer, M., Kreuter, C., Krolikowski, J., Kronkvist, I., Kruenermarquis, U., Krupinski, W., Kulka, K., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, J. W., Lanceri, L., Lapin, V., Last, I., Laugier, J. P., Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Lesiak, T., Levy, J. M., Lieb, E., Liko, D., Lindgren, J., Lindner, R., Lippi, I., Loerstad, B., Lokajicek, M., Loken, J. G., Lopezfernandez, A., M. A. L., Los, M., Loukas, D., Lozano, J. J., Lutz, P., Lyons, L., Maehlum, G., Maillard, J., Maio, A., Maltezos, A., Mandl, F., Marco, J., Margoni, Martino, Marin, J. C., Markou, A., Maron, T., Marti, S., Martinezrivero, C., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Medbo, J., Meola, G., Meroni, C., Meyer, W. T., Michelotto, M., Mikulec, I., Mirabito, L., Mitaroff, W. A., Mitselmakher, G. V., Mjoernmark, U., Moa, T., Moeller, R., Moenig, K., Monge, M. R., Morettini, P., Mueller, H., Murray, W. J., Muryn, B., Myatt, G., Navarria, F. L., Negri, P., Nemecek, S., Nicolaidou, R., Nielsen, B. S., Nijjhar, B., Nikolaenko, V., P. E. S., Niss, P., Nomerotski, A., Obraztsov, V., Olshevski, A. G., Orava, R., Ostankov, A., Osterberg, K., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T. D., Pape, L., Parodi, F., Passeri, A., Pegoraro, M., Pennanen, J., Peralta, L., Pernegger, H., Pernicka, M., Perrotta, A., Petridou, C., Petrolini, A., Petrovykh, L., Piana, G., Pierre, F., Pimenta, M., Plaszczynski, S., Podobrin, O., Pol, M. E., Polok, G., Poropat, P., Pozdniakov, V., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Rahmani, H., Rames, J., Ratoff, P. N., Read, A. L., Rebecchi, P., Redaelli, N. G., Regler, M., Reid, D., Renton, P. B., Resvanis, L. K., Richard, F., Richardson, J., Ridky, J., Rinaudo, G., Roditi, I., Romero, A., Roncagliolo, I., Ronchese, Paolo, Ronnqvist, C., Rosenberg, E. I., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmannkleider, V., Ruiz, A., Rybicki, K., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, J., Sannino, M., Schael, S., Schneider, H., M. A. E., Sciolla, G., Scuri, F., Segar, A. M., Seitz, A., Sekulin, R., Sessa, M., Seufert, R., Shellard, R. C., Siccama, I., Siegrist, P., Simonetti, S., Simonetto, Franco, Sisakian, A. N., Skjevling, G., Smadja, G., Smirnov, N., Smirnova, O., Smith, G. R., Sosnowski, R., Souzasantos, D., Spassoff, T. S., Spiriti, E., Squarcia, S., Staeck, H., Stanescu, C., Stapnes, S., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Straver, J., Strub, R., Stugu, B., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tchikilev, O., Theodosiou, G. E., Tilquin, A., Timmermans, J., Timofeev, V. G., Tkatchev, L. G., Todorov, T., Toet, D. Z., Toker, O., Tomaradze, A., Tome, B., Torassa, E., Tortora, L., Treille, D., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E. N., Turala, M., Turluer, M. L., Tuuva, T., Tyapkin, I. A., Tyndel, M., Tzamarias, S., Ueberschaer, S., Ullaland, O., Uvarov, V., Valenti, G., Vallazza, E., J. A. V., Vandervelde, C., Vanapeldoorn, G. W., Vandam, P., Vanderheijden, M., Vandoninck, W. K., Vaneldik, J., Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Verlato, M., Vertogradov, L. S., Vilanova, D., Vincent, P., Vitale, L., Vlasov, E., Vodopyanov, A. S., Vollmer, M., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wehr, A., Weierstall, M., Weilhammer, P., Wetherell, A. M., Wickens, J. H., Wilkinson, G. R., W. S. C., Winter, M., Witek, M., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zimin, N. I., Zito, M., Zontar, D., Zuberi, R., Funchal, R. Z., Zumerle, Gianni, Zuniga, J., Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), DELPHI, Delphi, Collaboration, Abreu, P., Adam, W., Canale, Vincenzo, Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nuclear and High Energy Physics, Particle physics, LUND MONTE-CARLO, Electron–positron annihilation, Scalar (mathematics), Elementary particle, 01 natural sciences, JET FRAGMENTATION, Nuclear physics, PHYSICS, SEARCH, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], PARTICLES, Leptoquark, E+E COLLIDERS, Limit (mathematics), SIGNATURES, 010306 general physics, Physics, 010308 nuclear & particles physics, Branching fraction, High Energy Physics::Phenomenology, Yukawa potential, Pair production, High Energy Physics::Experiment, Física nuclear, Particle Physics - Experiment
Abstract: A search has been made for pairs and for single production of scalar leptoquarks of the first and second generations using a data sample of 392000 Z0 decays from the DELPHI detector at LEP 1. No signal was found and limits on the leptoquark mass, production cross section and branching ratio were set. A mass limit at 95% confidence level of 45.5 GeV/c2 was obtained for leptoquark pair production. The search for the production of a single leptoquark probed the mass region above this limit and its results exclude first and second generation leptoquarks D0 with masses below 65 GeV/c2 and 73 GeV/c2 respectively, at 95% confidence level, assuming that the D0lq Yukawa coupling alpha(lambda) is equal to the electromagnetic one. An upper limit is also given on the coupling alpha(lambda) as a function of the leptoquark mass m(D0).
Published: 1993
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21. MEASUREMENT OF INCLUSIVE PRODUCTION OF LIGHT MESON RESONANCES IN HADRONIC DECAYS OF THE Z0

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD and ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G and BARDIN, DY BARKER, G BARONCELLI, A BARRING, O BARRIO, JA and BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y and BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M and BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J and BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P and BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S and BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV and BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA and BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA and CACCIA, M CALVI, M ROZAS, AJC CAMPION, R CAMPORESI, T and CANALE, V CAO, F CARENA, F CARROLL, L CASO, C and GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V and CHAN, A CHAPKIN, M CHARPENTIER, P CHAUSSARD, L and CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L and CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM CLARA, MP and COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G and COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G and CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUM, A and DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J DASILVA, W and DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P and DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DECLERCQ, C and LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B and DEMIN, A DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DUPONT, F EEK, LO EEROLA, PAM EHRET, R and EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N and FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A and FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R and FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J and GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U and GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A and GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F and GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P and GROSSETETE, B GUY, J HAEDINGER, U HAHN, F HAHN, M and HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K and DEMONCHENAULT, GH HAO, W HARRIS, FJ HENKES, T and HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIETANEN, I and HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF and HOOPER, JE HOULDEN, M HRUBEC, J HUET, K HULTH, PO and HULTQVIST, K IOANNOU, P ISENHOWER, D IVERSEN, PS and JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B and JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L and JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M and KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R and KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ and KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORCYL, K and KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KUCEWICZ, W KULKA, K KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T and LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R and LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG and LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D and LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J and MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC and MARKOU, A MARON, T MARTI, S MATHIS, L MATORRAS, F and MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT and MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA and MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ and MYATT, G NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B and NIKOLAENKO, V NILSEN, PES NISS, P OBRAZTSOV, V and OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD and PAPE, L PASSERI, A PEGORARO, M PENNANEN, J and PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PETRIDOU, C and PETROLINI, A PETTERSEN, TE PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S POL, ME POLOK, G POROPAT, P and PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D and RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M and RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, S and ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHULZE, B SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F and SISAKIAN, AN SKJEVLING, G SMADJA, G SMIRNOV, N SMITH, GR and SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T and TCHIKILEV, O THEODOSIOU, GE TILQUIN, A TIMMERMANS, J and TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O and TOMARADZE, A TORASSA, E TORTORA, L TREILLE, D and TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A and TSYGANOV, EN TURLUER, ML TUUVA, T TYAPKIN, IA and TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O and UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M and VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W and VERBEURE, F VERTOGRADOV, LS VILANOVA, D VINCENT, P and VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEHR, A WEIERSTALL, M WEILHAMMER, P and WERNER, J WETHERELL, AM WICKENS, JH WILKINSON, GR and WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K and YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Abstract: A study of inclusive production of the meson resonances rho0, K*0 (892), f0(975) and f2(1270) in hadronic decays of the Z0 is presented. The measured mean meson multiplicity per hadronic event is 0.83 +/- 0.14 for the rho0, 0.64 +/- 0.24 for the K*0(892). 0.10 +/- 0.04 for the f0(975) in the momentum range p > 0.05p(beam) (x(p) > 0.05) and 0.11 +/- 0.05 for the f2 (1270) for x(p) > 0. 1. These values and the corresponding differential cross sections (1/sigma(hadr)) dsigma/dx(p) for the vector mesons are in good agreement with the predictions of the JETSET 7.3 PS and HFRWIG 5.4 models. The f2 (1270) production is overestimated by HERWIG but its x(p)-shape is correctly reproduced. The measured ratios of the production cross sections sigma (f2(1270))/sigma(rho0) = 0.22 +/- 0.08 and sigma(f2(1270))/sigma(f0(975)) = 3(-1)+7 for x(p) > 0.1 are consistent with the results obtained in hadronic reactions.
Published: 1993

22. MEASUREMENT OF LAMBDA-B PRODUCTION AND LIFETIME IN Z0 HADRONIC DECAYS

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S and ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P and APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F and BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M and BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C and BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B and BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S and BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C and BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T and BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F and CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A and CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHAPKIN, M and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D and CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DAUBIE, E DAUM, A and DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N DEANGELIS, A and DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N and DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H and DICIACCIO, L DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DUPONT, F EDSALL, D and EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G and PEISERT, AE ENGEL, JP ERSHAIDAT, N FASSOULIOTIS, D and FEINDT, M FENYUK, A ALONSO, MF FERRER, A FILIPPAS, TA and FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F and FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P and FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F and FURNIVAL, K FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C and GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B and GOLOVATYUK, VM GOMEZ, JJ CADENAS, Y GOPAL, G GORN, L and GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E and GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B and GUY, J HAEDINGER, U HAHN, F HAHN, M HAIDER, S and HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K and DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T and HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL and HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD and HOFMOKL, T HOLMGREN, SO HOLTHUIZEN, D HONORE, PF and HOOPER, JE HOULDEN, M HRUBEC, J HUET, K HULTH, PO and HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK and JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G and KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E and KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J and KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H and KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORCYL, K KORYTOV, AV and KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH and KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U and KUCEWICZ, W KULKA, K KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T and LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R and LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG and LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D and LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J and MAIO, A MALTEZOS, A MANDL, F MARCO, J MARGONI, M and MARIN, JC MARKOU, A MARON, T MARTI, S MATORRAS, F and MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT and MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA and MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ and MYATT, G NAVARRIA, FL NEGRI, P NICOLAIDOU, R NIELSEN, BS and NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P and NOMEROTSKI, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R and OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R and PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H and PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S PODOBRIN, O and POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PRIVITERA, P and PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M and RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, S and ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A and SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC and SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F and SISAKIAN, AN SKJEVLING, G SMADJA, G SMIRNOVA, O SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOFF, TS SPIRITI, E and SQUARCIA, S STAECK, H STANESCU, C STAPNES, S and STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J and STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M and SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE and TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG and TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E and TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURLUER, ML and TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E and FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P and VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS and VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H and WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P and WERNER, J WETHERELL, AM WICKENS, JH WILKINSON, GR and WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K and YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Earth and Planetary Astrophysics
Abstract: Evidence for the production of b-flavoured baryons in Z0 decays is reported from the analysis of 365 000 hadronic events collected by the DELPHI detector. Assuming that most of the weakly decaying b flavoured baryons produced by the Z0 are LAMBDA(b), the observed signal of (LAMBDAl- + LAMBDAl+BAR) pairs, where l is a high transverse momentum lepton in the same jet as the LAMBDA, leads to a production rate: f (b –> LAMBDA(b)) x Br(LAMBDA(b) –> LAMBDAlnuX) = (0.41 +/- 0.13 +/- 0.09)%. Using a sample of 18 reconstructed LAMBDA(b) decay vertices, the lifetime is determined to be tau(LAMBDA(b)) = ( 1.04(-0.38)+0.48 +/- 0.10) ps.
Published: 1993

23. LIMITS ON THE PRODUCTION OF SCALAR LEPTOQUARKS FROM Z(0) DECAYS AT LEP

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R and ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ and AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEGALLI, M BEILLIERE, P and BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENVENUTI, AC and BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLOCKI, J BLYTH, S BOCCI, V and BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W and BOOTH, PSL BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B and BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C and BOWCOCK, TJV BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD and BRENNER, RA BRIAND, H BRICMAN, C BRILLAULT, L BROWN, RCA BRUCKMAN, P BRUNET, JM BUDZIAK, A BUGGE, L and BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F and CARENA, F CARROLL, L GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHAPKIN, M and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R and CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S and DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G and DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVIES, J and DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N and DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S and DECLERCQ, C LASO, MDMD DELAVAISSIERE, C DELOTTO, B and DEMIN, A DIJKSTRA, H DICIACCIO, L DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DUPONT, F EDSALL, D EEK, LO EEROLA, PAM and EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ELSING, M and ENGEL, JP ERSHAIDAT, N FASSOULIOTIS, D FEINDT, M FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R and FULDAQUENZER, F FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P and GAZIS, EN GERBER, JP GIACOMELLI, P GILLESPIE, D GOKIELI, R GOLOB, B GOLOVATYUK, VM CADENAS, JJGY GOPAL, G and GORN, L GORSKI, M GRACCO, V GRANT, A GRARD, F and GRAZIANI, E GROSDIDIER, G GROSS, E GROSSETETE, B GUY, J and HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAKANSSON, A and HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W and HARRIS, FJ HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P and HERR, H HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E and HILKE, HJ HODGSON, SD HOFMOKL, T HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HONORE, PF HOULDEN, M HRUBEC, J and HUET, K HULTH, PO HULTQVIST, K IOANNOU, P IVERSEN, PS and JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M and KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R and KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H and KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORYTOV, AV KOSTIOUKHINE, V and KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KRAMMER, M and KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U and KRUPINSKI, W KULKA, K KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAST, I and LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F and LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J and LINDNER, R LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG and LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D and LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J and MAIO, A MALTEZOS, A MANDL, F MARCO, J MARGONI, M and MARIN, JC MARKOU, A MARON, T MARTI, S MARTINEZRIVERO, C and MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M and MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MEOLA, G and MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L and MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MURRAY, WJ MURYN, B MYATT, G NAVARRIA, FL NEGRI, P and NEMECEK, S NICOLAIDOU, R NIELSEN, BS NIJJHAR, B and NIKOLAENKO, V NILSEN, PES NISS, P NOMEROTSKI, A and OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A and OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H and PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PETROVYKH, L PIANA, G PIERRE, F PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O and POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PRIVITERA, P and PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG and REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F and RICHARDSON, J RIDKY, J RINAUDO, G RODITI, I ROMERO, A and RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI and ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H and SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M and SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F and SEGAR, AM SEITZ, A SEKULIN, R SESSA, M SEUFERT, R and SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S and SIMONETTO, F SISAKIAN, AN SKJEVLING, G SMADJA, G and SMIRNOV, N SMIRNOVA, O SMITH, GR SOSNOWSKI, R and SOUZASANTOS, D SPASSOFF, TS SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P and TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOMARADZE, A TOME, B TORASSA, E TORTORA, L TREILLE, D TRISCHUK, W TRISTRAM, G TRONCON, C and TSIROU, A TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T and TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VANELDIK, J VAZ, P VEGNI, G and VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E and VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M and WEILHAMMER, P WETHERELL, AM WICKENS, JH WILKINSON, GR and WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K and YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: A search has been made for pairs and for single production of scalar leptoquarks of the first and second generations using a data sample of 392000 Z0 decays from the DELPHI detector at LEP 1. No signal was found and limits on the leptoquark mass, production cross section and branching ratio were set. A mass limit at 95% confidence level of 45.5 GeV/c2 was obtained for leptoquark pair production. The search for the production of a single leptoquark probed the mass region above this limit and its results exclude first and second generation leptoquarks D0 with masses below 65 GeV/c2 and 73 GeV/c2 respectively, at 95% confidence level, assuming that the D0lq Yukawa coupling alpha(lambda) is equal to the electromagnetic one. An upper limit is also given on the coupling alpha(lambda) as a function of the leptoquark mass m(D0).
Published: 1993

24. A MEASUREMENT OF THE TAU LIFETIME

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R and ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ and AMALDI, U ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P and APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F and BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M and BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C and BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B and BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S and BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C and BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T and BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F and CARENA, F CARROLL, L GIMENEZ, MVC CATTAI, A CAVALLO, FR and CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P and CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA and CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM and CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D and CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E and DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J and DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N and DEANGELIS, A DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD and DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A and DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DUPONT, F EEK, LO EEROLA, PAM EHRET, R and EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N and FASSOULIOTIS, D FEINDT, M FENYUK, A ALONSO, MF and FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S and FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J and GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U and GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A and GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F and GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P and GROSSETETE, B GUMENYUK, S GUY, J HAEDINGER, U HAHN, F and HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A and HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ and HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H and HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO and HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J and HUET, K HULTH, PO HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F and KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P and KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P and KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIOUKHINE, V and KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J and KRONKVIST, I KRUENERMARQUIS, U KUCEWICZ, W KULKA, K and KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW and LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G and LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LEVY, JM LIEB, E LIKO, D and LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I and LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A and AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P and LYONS, L MAEHLUM, G MAILLARD, J MAIO, A MALTEZOS, A and MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A and MARON, T MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C and MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R and MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MYATT, G NAVARRIA, FL NEGRI, P and NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES and NISS, P OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A and OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R and PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PETTERSEN, TE and PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A and RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB and RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P and RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSI, U ROSSO, E and ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V and RUIZ, A RYBIN, A SAARIKKO, H SACQUIN, Y SAJOT, G and SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H and SCHULZE, B SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM and SEITZ, A SEKULIN, R SESSA, M SETTE, G SEUFERT, R and SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S and SIMONETTO, F SISAKIAN, AN SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOFF, TS SPIRITI, E and SQUARCIA, S STAECK, H STANESCU, C STAPNES, S and STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J and STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M and SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE and TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG and TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E and TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURLUER, ML and TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E and FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P and VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS and VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOULGARIS, G VOUTILAINEN, M VRBA, V and WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEHR, A and WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM and WICKENS, JH WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P and ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D and ZEYGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R and FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment
Abstract: The tau lepton lifetime is measured using four different methods with the DELPHI detector. Three measurements using one prong decays are combined, accounting for correlations, resulting in tau(tau) = 298 +/- 7 (stat.) +/- 4 (syst.) fs while the decay length distribution of three prong decays gives tau(tau) = 298 +/- 13 (stat.) +/- 5 (syst.) fs. The combined result is tau(tau) = 298 +/- 7 fs. The ratio of the Fermi coupling constant from tau decay relative to that from muon decay is found to be 0.985 +/- 0.013, compatible with lepton universality.
Published: 1993

25. PRODUCTION OF LAMBDA AND LAMBDA(LAMBDA)OVER-BAR CORRELATIONS IN THE HADRONIC DECAYS OF THE Z(0)

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R and ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ and AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEGALLI, M BEILLIERE, P and BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENVENUTI, AC and BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLOCKI, J BLYTH, S BOCCI, V and BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W and BOOTH, PSL BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B and BOSWORTH, S BOTNER, O BOUDINOV, E BOUQUET, B and BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S and BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C and BRILLAULT, L BROWN, RCA BRUCKMAN, P BRUNET, JM and BUDZIAK, A BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, R and CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L and GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V and CHAN, A CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J and CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P and CHOROWICZ, V CHRIN, JTM CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S and DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G and DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVIES, J and DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N and DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S and DECLERCQ, C DEFEZLASO, MDM DELAVAISSIERE, C DELOTTO, B and DEMIN, A DIJKSTRA, H DICIACCIO, L DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DUPONT, F EDSALL, D EEK, LO EEROLA, PAM and EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ELSING, M and ENGEL, JP ERSHAIDAT, N SANTO, ME FALALEEV, V and FASSOULIOTIS, D FEINDT, M FERRER, A FILIPPAS, TA and FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P and FRIES, DC FRODESEN, AG FULDAQUENZER, F FURSTENAU, H and FUSTER, J GAMBA, D GARCIA, C GARCIA, J GASPAR, C and GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP and GIACOMELLI, P GILLESPIE, D GOKIELI, R GOLOB, B and GOLOVATYUK, VM CADENAS, JJGY GOPAL, G GORN, L GORSKI, M and GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSETETE, B GUMENYUK, S GUY, J and HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAJDUK, Z and HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH and HAO, W HARRIS, FJ HEDBERG, V HENKES, T HENRIQUES, R and HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIETANEN, I and HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HONORE, PF and HOULDEN, M HRUBEC, J HUET, K HULTH, PO HULTQVIST, K and IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JONKER, M and JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F and KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ and KLEIN, H KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORCYL, K and KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O and KRAMER, PH KRAMMER, M KREUTER, C KROLIKOWSKI, J and KRONKVIST, I KRUENERMARQUIS, U KUCEWICZ, W KULKA, K and KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW and LANCERI, L LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R and LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LEVY, JM LIEB, E and LIKO, D LINDGREN, J LINDNER, R LIPPI, I LOERSTAD, B and LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL and LOS, M LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L and MAEHLUM, G MAILLARD, J MAIO, A MALTEZOS, A MANDL, F and MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T and MARTI, S MARTINEZRIVERO, C MATORRAS, F MATTEUZZI, C and MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R and MEDBO, J MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M and MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV and MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR and MORETTINI, P MUELLER, H MURRAY, WJ MYATT, G NAVARRIA, FL and NEGRI, P NEMECEK, S NICOLAIDOU, R NIELSEN, BS and NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P NOMEROTSKI, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A and OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H and PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PIANA, G PIERRE, F and PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O POL, ME and POLOK, G POROPAT, P POZDNIAKOV, V PRIVITERA, P PULLIA, A and RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, J and RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSO, E and ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V and RUIZ, A SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J and SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE and SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A SEKULIN, R and SESSA, M SEUFERT, R SHELLARD, RC SICCAMA, I and SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN and SKJEVLING, G SMADJA, G SMIRNOVA, O SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P and TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOMARADZE, A TOME, B TORASSA, E TORTORA, L TREILLE, D TRISCHUK, W TRISTRAM, G TRONCON, C and TSIROU, A TSYGANOV, EN TURLUER, ML TUUVA, T TYAPKIN, IA and TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O and UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M and VANDONINCK, WK VANELDIK, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS and VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H and WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P and WETHERELL, AM WICKENS, JH WILKINSON, GR WILLIAMS, WSC and WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZANIN, M ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI ZITO, M and ZONTAR, D ZUBERI, R ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment
Abstract: An analysis of the production of the LAMBDA baryon in the hadronic decays of the Z0 is presented, based on about 993K multihadronic events collected by the DELPHI detector at LEP during 1991 and 1992. The differential cross section of the LAMBDA and the correlations between LAMBDA and LAMBDABAR produced in the same event are compared to current models, based both on string fragmentation and on cluster decay. The predictions of the string fragmentation model are found to give satisfactory agreements with the data, clearly better than those of the cluster model.
Published: 1993

26. A MEASUREMENT OF THE MEAN LIFETIMES OF CHARGED AND NEUTRAL B-HADRONS

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S and ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P and APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F and BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M and BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C and BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B and BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S and BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C and BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T and BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F and CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A and CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P and CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA and CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM and COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G and COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G and CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DAUBIE, E DAUM, A DAUNCEY, PD and DAVENPORT, M DAVID, P DAVIES, J DASILVA, W DEFOIX, C and DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H and DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N and DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H and DICIACCIO, L DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DUPONT, F EDSALL, D and EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G and PEISERT, AE ENGEL, JP ERSHAIDAT, N FALALEEV, V and FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F and FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P and FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F and FURNIVAL, K FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C and GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B and GOLOVATYUK, VM CADENAS, JJGY GOPAL, G GORN, L GORSKI, M and GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B GUY, J and HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAKANSSON, A and HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P and HERR, H HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E and HILKE, HJ HODGSON, SD HOFMOKL, T HOLMGREN, SO and HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J and HUET, K HULTH, PO HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F and KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P and KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P and KORATZINOS, M KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C and KOUZNETSOV, O KRAMER, PH KREUTER, C KROLIKOWSKI, J and KRONKVIST, I KRUENERMARQUIS, U KRUPINSKI, W KULKA, K and KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW and LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G and LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LEVY, JM LIEB, E LIKO, D and LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I and LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A and AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P and LYONS, L MAEHLUM, G MAILLARD, J MAIO, A MALTEZOS, A and MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A and MARON, T MARTI, S MATORRAS, F MATTEUZZI, C MATTHIAE, G and MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I and MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U and MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MURYN, B MYATT, G NAVARRIA, FL and NEGRI, P NICOLAIDOU, R NIELSEN, BS NIJJHAR, B and NIKOLAENKO, V NILSEN, PES NISS, P NOMEROTSKI, A and OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A and OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H and PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S PODOBRIN, O POL, ME and POLOK, G POROPAT, P POZDNIAKOV, V PRIVITERA, P PULLIA, A and RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG REGLER, M REID, D and RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSO, E and ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V and RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G and SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H and SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A and SEKULIN, R SESSA, M SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN and SKJEVLING, G SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR and SOSNOWSKI, R SOUZASANTOS, D SPASSOFF, TS SPIRITI, E and SQUARCIA, S STAECK, H STANESCU, C STAPNES, S and STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J and STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M and SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE and TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG and TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E and TORTORA, L TRIELLE, D TRISCHUK, W TRISTRAM, G TRONCON, C and TSIROU, A TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W and VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D and VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M and VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F and WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J and WETHERELL, AM WICKENS, JH WILKINSON, GR WILLIAMS, WSC and WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N and YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P and ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M and ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment, Astrophysics::Galaxy Astrophysics
Abstract: The decays of B-hadrons have been reconstructed using the charged particles recorded in the DELPHI silicon microstrip detector. The sum of the charges of the secondaries determines the charge of the B-hadron parent. Some 232 114 multihadronic Z0 decays recorded during the 1991 run of LEP at centre-of-mass energies between 88.2 GeV and 94.2 GeV yield 253 B-hadron candidates with well-measured charge. From these the mean lifetimes of neutral and charged B-hadrons are found to be 1.44 +/- 0.21(stat.) +/- 0.14(syst.) ps and 1.56 +/- 0.19(stat.) +/- 0.13(syst.) ps respectively. The ratio of their lifetimes is 1.09(-0.23)+0.28 (Stat.) +/- 0.11 (syst.). Under some assumptions on the abundance and lifetime of the LAMBDA(b)0 and B(s)0 states, the B0 and B+ lifetimes are inferred.
Published: 1993

27. DETERMINATION OF ALPHA-S FROM THE SCALING VIOLATION IN THE FRAGMENTATION FUNCTIONS IN E+E- ANNIHILATION

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R and ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ and AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GI BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F and BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M and BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C and BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B and BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S and BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C and BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T and BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F and CARENA, F CARROLL, L GIMENEZ, MVC CATTAI, A CAVALLO, FR and CERRITO, L CHABAUD, V CHAN, A CHAPKIN, M and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D and CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E and DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J and DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N and DEANGELIS, A DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD and DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A and DIJKSTRA, H DICIACCIO, L DOLBEAU, J DONSZELMANN, M and DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y and DUPONT, F EDSALL, D EEK, LO EEROLA, PAM EHRET, R and EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N and FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A and FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R and FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J and GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U and GAVILLET, P GAZIS, EN GERBER, JP GERDYUKOV, L and GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM and CADENAS, JJGY GOPAL, G GORN, L GORSKI, M GRACCO, V and GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E and GROSSEWIESMANN, P GROSSETETE, B GUY, J HAEDINGER, U and HAHN, F HAHN, M HAIDER, S HAKANSSON, A HALLGREN, A and HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H and HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ and HODGSON, SD HOFMOKL, T HOLMGREN, SO HOLTHUIZEN, D and HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HUET, K and HULTH, PO HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B and JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P and KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M and KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R and KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ and KLEIN, H KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORYTOV, AV and KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH and KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U and KRUPINSKI, W KULKA, K KURVINEN, K KUSSMAUL, T LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V and LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J and LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M and LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G and MAILLARD, J MAIO, A MALTEZOS, A MANDL, F MARCO, J and MARGONI, M MARIN, JC MARKOU, A MARON, T MARTI, S and MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M and MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C and MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R and MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ and MURYN, B MYATT, G NAVARRIA, FL NEGRI, P NICOLAIDOU, R NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES and NISS, P NOMEROTSKI, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M and PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F and PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A and PETROVYKH, L PIERRE, F PIMENTA, M PINGOT, O and PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P and POZDNIAKOV, V PRIVITERA, P PULLIA, A RADOJICIC, D and RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REBECCHI, P and REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G and RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P and RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSO, E ROUDEAU, P and ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A and RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J and SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE and SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A SEKULIN, R and SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I and SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN and SKJEVLING, G SMADJA, G SMIRNOVA, O SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOFF, TS SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P and TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E TORTORA, L TREILLE, D and TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C and TSIROU, A TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T and TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W and VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D and VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M and VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F and WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J and WETHERELL, AM WICKENS, JH WILKINSON, GR WILLIAMS, WSC and WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N and YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P and ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M and ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: A determination of the hadronic fragmentation functions of the Z0 boson is presented from a study of the inclusive hadron production with the DELPHI detector at LEP. These fragmentation functions were compared with the ones at lower energies, thus covering data in a large kinematic range: 196 less-than-or-equal-to Q2 less-than-or-equal-to 8312 GeV2 and x (= p(h)/E(beam)) > 0.08. A large scaling violation was observed, which was used to extract the strong coupling constant in second order QCD: alpha(s)(M(Z)) = 0.118 +/- 0.005. The corresponding QCD scale for five quark flavours is: LAMBDA(MS)(5)BAR = 230 +/- 60 MeV.
Published: 1993

28. A Study of B(0)-(b)over-bar(0) Mixing Using Semileptonic Decays of B-hadrons Produced From Z(0)

Author: Abreu, P., Adam, W., Adye, T., Agasi, E., Aleksan, R., Alekseev, G. D., Algeri, A., Allen, P., Almehed, S., Alvsvaag, S. J., Amaldi, U., Anassontzis, E. G., Andreazza, A., Antilogus, P., Apel, W. D., Apsimon, R. J., Arnoud, Y., Asman, B., Augustin, J. E., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, D. Y., Barker, G., Baroncelli, A., Barring, O., Barrio, J. A., Bartl, W., Bates, M. J., Battaglia, M., Baubillier, M., Becks, K. H., Beeston, C. J., Begalli, M., Beilliere, P., Belokopytov, Y., Beltran, P., Benedic, D., Benvenuti, A. C., Berggren, M., Bertrand, D., Bianchi, F., Bilenky, M. S., Billoir, P., Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolubov, P. N., Bolognese, T., Bonesini, M., Bonivento, W., P. S. L., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Bosworth, S., Botner, O., Boudinov, E., Bouquet, B., Bourdarios, C., T. J. V., Bozzo, M., Braibant, S., Branchini, P., Brand, K. D., Brenner, R. A., Briand, H., Bricman, C., R. C. A., Brummer, N., Brunet, J. M., Bugge, L., Buran, T., Burmeister, H., J. A. M., Caccia, M., Calvi, M., A. J. C., Campion, R., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., Caso, C., M. V. C., Cattai, A., Cavallo, F. R., Cerrito, L., Chabaud, V., Chan, A., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, G. A., Chevalier, L., Chliapnikov, P., Chorowicz, V., J. T. M., Clara, M. P., Collins, P., Contreras, J. L., Contri, R., Cortina, E., Cosme, G., Couchot, F., Crawley, H. B., Crennell, D., Crosetti, G., Crozon, M., Maestro, J. C., Czellar, S., Dahljensen, E., Dalmagne, B., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Daum, A., Dauncey, P. D., Davenport, M., David, P., Davies, J., Dasilva, W., Defoix, C., Delikaris, D., Delorme, S., Delpierre, P., Demaria, N., Deangelis, A., Deboeck, H., Deboer, W., Declercq, C., M. D. M., Degroot, N., Delavaissiere, C., Delotto, B., Demin, A., Dijkstra, H., Diciaccio, L., Djama, F., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Dupont, F., Eek, L. O., P. A. M., Ehret, R., Ekelof, T., Ekspong, G., Peisert, A. E., Engel, J. P., Ershaidat, N., Fassouliotis, D., Feindt, M., Alonso, M. F., Ferrer, A., Filippas, T. A., Firestone, A., Foeth, H., Fokitis, E., Fontanelli, F., K. A. J., Fousset, J. L., Francon, S., Franek, B., Frenkiel, P., Fries, D. C., Frodesen, A. G., Fruhwirth, R., Fuldaquenzer, F., Furnival, K., Furstenau, H., Fuster, J., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, E. N., Gerber, J. P., Giacomelli, P., Gokieli, R., Golob, B., Golovatyuk, V. M., J. J. G., Goobar, A., Gopal, G., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grossewiesmann, P., Grossetete, B., Gumenyuk, S., Guy, J., Haedinger, U., Hahn, F., Hahn, M., Haider, S., Hakansson, A., Hallgren, A., Hamacher, K., Demonchenault, G. H., Hao, W., Harris, F. J., Henkes, T., Hernandez, J. J., Herquet, P., Herr, H., Hessing, T. L., Hietanen, I., Higgins, C. O., Higon, E., Hilke, H. J., Hodgson, S. D., Hofmokl, T., Holmes, R., Holmgren, S. O., Holthuizen, D., Honore, P. F., Hooper, J. E., Houlden, M., Hrubec, J., Huet, K., Hulth, P. O., Hultqvist, K., Ioannou, P., Isenhower, D., Iversen, P. S., Jackson, J. N., Jalocha, P., Jarlskog, G., Jarry, P., Jeanmarie, B., Johansson, E. K., Johnson, D., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Kapusta, F., Karlsson, M., Karvelas, E., Katsanevas, S., Katsoufis, E. C., Keranen, R., Kesteman, J., Khomenko, B. A., Khovanski, N. N., King, B., Kjaer, N. J., Klein, H., Klempt, W., Klovning, A., Kluit, P., Kochmehrin, A., Koehne, J. H., Koene, B., Kokkinias, P., Kopf, M., Korytov, A. V., Kostioukhine, V., Kourkoumelis, C., Kouznetsov, O., Kramer, P. H., Krolikowski, J., Kronkvist, I., Kruenermarquis, U., Krupinski, W., Kulka, K., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, J. W., Lanceri, L., Lapin, V., Laugier, J. P., Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Lesiak, T., Levy, J. M., Lieb, E., Liko, D., Lindgren, J., Lindner, R., Lipniacka, A., Lippi, I., Loerstad, B., Lokajicek, M., Loken, J. G., Lopezfernandez, A., M. A. L., Los, M., Loukas, D., Lozano, J. J., Lutz, P., Lyons, L., Maehlum, G., Maillard, J., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, J. C., Markou, A., Maron, T., Marti, S., Mathis, L., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Meola, G., Meroni, C., Meyer, W. T., Michelotto, M., Mikulec, I., Mirabito, L., Mitaroff, W. A., Mitselmakher, G. V., Mjoernmark, U., Moa, T., Moeller, R., Moenig, K., Monge, M. R., Morettini, P., Mueller, H., Murray, W. J., Muryn, B., Myatt, G., Navarria, F. L., Negri, P., Nielsen, B. S., Nijjhar, B., Nikolaenko, V., P. E. S., Niss, P., Obraztsov, V., Olshevski, A. G., Orava, R., Ostankov, A., Osterberg, K., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T. D., Pape, L., Passeri, A., Pegoraro, M., Pennanen, J., Perevozchikov, V., Pernegger, H., Pernicka, M., Perrotta, A., Petridou, C., Petrolini, A., Petrovykh, L., Pettersen, T. E., Pierre, F., Pimenta, M., Pingot, O., Plaszczynski, S., Pol, M. E., Polok, G., Poropat, P., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Rahmani, H., Ratoff, P. N., Read, A. L., Redaelli, N. G., Regler, M., Reid, D., Renton, P. B., Resvanis, L. K., Richard, F., Richardson, M., Ridky, J., Rinaudo, G., Roditi, I., Romero, Alessandra, Roncagliolo, I., Ronchese, P., Ronnqvist, C., Rosenberg, E. I., Rossi, S., Rossi, U., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmannkleider, V., Ruiz, A., Rybicki, K., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, J., Sannino, M., Schael, S., Schneider, H., Schulze, B., M. A. E., Sciolla, G., Scuri, F., Segar, A. M., Sekulin, R., Sessa, M., Sette, G., Seufert, R., Shellard, R. C., Siccama, I., Siegrist, P., Simonetti, S., Simonetto, F., Sisakian, A. N., Skjevling, G., Smadja, G., Smith, G. R., Sosnowski, R., Souzasantos, D., Spassoff, T. S., Spiriti, E., Squarcia, S., Staeck, H., Stanescu, C., Stapnes, S., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Straver, J., Strub, R., Stugu, B., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tchikilev, O., Theodosiou, G. E., Tilquin, A., Timmermans, J., Timofeev, V. G., Tkatchev, L. G., Todorov, T., Toet, D. Z., Toker, O., Torassa, E., Tortora, L., Treille, D., Trevisan, U., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E. N., Turala, M., Turluer, M. L., Tuuva, T., Tyapkin, I. A., Tyndel, M., Tzamarias, S., Ueberschaer, S., Ullaland, O., Uvarov, V., Valenti, G., Vallazza, E., J. A. V., Vandervelde, C., Vanapeldoorn, G. W., Vandam, P., Vanderheijden, M., Vandoninck, W. K., Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Vertogradov, L. S., Vilanova, D., Vincent, P., Vitale, L., Vlasov, E., Vodopyanov, A. S., Vollmer, M., Voulgaris, G., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wayne, M., Wehr, A., Weierstall, M., Weilhammer, P., Werner, J., Wetherell, A. M., Wickens, J. H., Wilkinson, G. R., W. S. C., Winter, M., Witek, M., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zhang, G., Zimin, N. I., Zito, M., Zuberi, R., Funchal, R. Z., Zumerle, G., and Zuniga, J.
Subjects: LUND MONTE-CARLO, JET FRAGMENTATION, E+E-PHYSICS, COLLIDER
Published: 1993

29. Search For Z(0) Decays To 2 Leptons and A Charged-particle Antiparticle Pair

Author: Abreu, P, Adam, W, Adye, T, Agasi, E, Aleksan, R, Alekseev, Gd, Algeri, A, Allen, P, Almehed, S, Alvsvaag, Sj, Amaldi, U, Andreazza, A, Antilogus, P, Apel, Wd, Apsimon, Rj, Arnoud, Y, Asman, B, Augustin, Je, Augustinus, A, Baillon, P, Bambade, P, Barao, F, Barate, R, Barbiellini, G, Bardin, Dy, Barker, Gj, Baroncelli, A, Barring, O, Barrio, Ja, Bartl, W, Bates, Mj, Battaglia, M, Baubillier, M, Becks, Kh, Beeston, Cj, Begalli, M, Beilliere, P, Belokopytov, Y, Beltran, P, Benedic, D, Benvenuti, Ac, Berggren, M, Bertrand, D, Bianchi, F, Bilenky, Ms, Billoir, P, Bjarne, J, Bloch, D, Blyth, S, Bocci, V, Bogolubov, Pn, Bolognese, T, Bonesini, M, Bonivento, W, Booth, Psl, Borisov, G, Borner, H, Bosio, C, Bostjancic, B, Bosworth, S, Botner, O, Boudinov, E, Bouquet, B, Bourdarios, C, Bowcock, Tjv, Bozzo, M, Braibant, S, Branchini, P, Brand, Kd, Brenner, Ra, Briand, H, Bricman, C, Brown, Rca, Brummer, N, Brunet, Jm, Bugge, L, Buran, T, Burmeister, H, Buytaert, Jama, Caccia, M, Calvi, M, Rozas, Ajc, Campion, R, Camporesi, T, Canale, V, Cao, F, Carena, F, Carroll, L, Caso, C, Gimenez, Mvc, Cattai, A, Cavallo, Fr, Cerrito, L, Chabaud, V, Chan, A, Charpentier, P, Chaussard, L, Chauveau, J, Checchia, P, Chelkov, Ga, Chevalier, L, Chliapnikov, P, Chorowicz, V, Chrin, Jtm, Collins, P, Contreras, Jl, Contri, R, Cortina, E, Cosme, G, Couchot, F, Crawley, Hb, Crennell, D, Crosetti, G, Crozon, M, Maestro, Jc, Czellar, S, Dahljensen, E, Dalmagne, B, Dam, M, Damgaard, G, Darbo, G, Daubie, E, Daum, A, Dauncey, Pd, Davenport, M, David, P, Davies, J, Dasilva, W, Defoix, C, Delpierre, P, Demaria, N, Deangelis, A, Deboeck, H, Deboer, W, Declercq, C, Laso, Mdmd, Degroot, N, Delavaissiere, C, DE LOTTO, Barbara, Demin, A, Dijkstra, H, Diciaccio, L, Dolbeau, J, Donszelmann, M, Doroba, K, Dracos, M, Drees, J, Dris, M, Dufour, Y, Dupont, F, Edsall, D, Eek, Lo, Eerola, Pam, Ehret, R, Ekelof, T, Ekspong, G, Peisert, Ae, Engel, Jp, Ershaidat, N, Fassouliotis, D, Feindt, M, Alonso, Mf, Ferrer, A, Filippas, Ta, Firestone, A, Foeth, H, Fokitis, E, Fontanelli, F, Forbes, Kaj, Fousset, Jl, Francon, S, Franek, B, Frenkiel, P, Fries, Dc, Frodesen, Ag, Fruhwirth, R, Fuldaquenzer, F, Furnival, K, Furstenau, H, Fuster, J, Gamba, D, Garcia, C, Garcia, J, Gaspar, C, Gasparini, U, Gavillet, P, Gazis, En, Gerber, Jp, Giacomelli, P, Gokieli, R, Golob, B, Golovatyuk, Vm, Gomez, Jj, Cadenas, Y, Gopal, G, Gorn, L, Gorski, M, Gracco, V, Grant, A, Grard, F, Graziani, E, Grosdidier, G, Gross, E, Grossewiesmann, P, Grossetete, B, Gumenyuk, S, Guy, J, Haedinger, U, Hahn, F, Hahn, M, Haider, S, Hakansson, A, Hallgren, A, Hamacher, K, Demonchenault, Gh, Hao, W, Harris, Fj, Hedberg, V, Henkes, T, Hernandez, Jj, Herquet, P, Herr, H, Hessing, Tl, Hietanen, I, Higgins, Co, Higon, E, Hilke, Hj, Hodgson, Sd, Hofmokl, T, Holmgren, So, Holthuizen, D, Honore, Pf, Hooper, Je, Houlden, M, Hrubec, J, Huet, K, Hulth, Po, Hultqvist, K, Ioannou, P, Iversen, Ps, Jackson, Jn, Jalocha, P, Jarlskog, G, Jarry, P, Jeanmarie, B, Johansson, Ek, Johnson, D, Jonker, M, Jonsson, L, Juillot, P, Kalkanis, G, Kalmus, G, Kapusta, F, Karlsson, M, Karvelas, E, Katsanevas, S, Katsoufis, Ec, Keranen, R, Kesteman, J, Khomenko, Ba, Khovanski, Nn, King, B, Kjaer, Nj, Klein, H, Klovning, A, Kluit, P, Kochmehrin, A, Koehne, Jh, Koene, B, Kokkinias, P, Koratzinos, M, Korytov, Av, Kostioukhine, V, Kourkoumelis, C, Kouznetsov, O, Kramer, Ph, Kreuter, C, Krolikowski, J, Kronkvist, I, Kruenermarquis, U, Krupinski, W, Kulka, K, Kurvinen, K, Lacasta, C, Lambropoulos, C, Lamsa, Jw, Lanceri, L, Lapin, V, Laugier, Jp, Lauhakangas, R, Leder, G, Ledroit, F, Leitner, R, Lemoigne, Y, Lemonne, J, Lenzen, G, Lepeltier, V, Lesiak, T, Levy, Jm, Lieb, E, Liko, D, Lindgren, J, Lindner, R, Lipniacka, A, Lippi, I, Loerstad, B, Lokajicek, M, Loken, Jg, Lopezfernandez, A, Aguera, Mal, Los, M, Loukas, D, Lozano, Jj, Lutz, P, Lyons, L, Maehlum, G, Maillard, J, Maio, A, Maltezos, A, Mandl, F, Marco, J, Margoni, M, Marin, Jc, Markou, A, Maron, T, Marti, S, Matorras, F, Matteuzzi, C, Matthiae, G, Mazzucato, M, Mccubbin, M, Mckay, R, Mcnulty, R, Meola, G, Meroni, C, Meyer, Wt, Michelotto, M, Mikulec, I, Mirabito, L, Mitaroff, Wa, Mitselmakher, Gv, Mjoernmark, U, Moa, T, Moeller, R, Moenig, K, Monge, Mr, Morettini, P, Mueller, H, Murray, Wj, Muryn, B, Myatt, G, Navarria, Fl, Negri, P, Nicolaidou, R, Nielsen, Bs, Nijjhar, B, Nikolaenko, V, Nilsen, Pes, Niss, P, Nomerotski, A, Obraztsov, V, Olshevski, Ag, Orava, R, Ostankov, A, Osterberg, K, Ouraou, A, Paganoni, M, Pain, R, Palka, H, Papadopoulou, Td, Pape, L, Parodi, F, Passeri, A, Pegoraro, M, Pennanen, J, Peralta, L, Perevozchikov, V, Pernegger, H, Pernicka, M, Perrotta, A, Petridou, C, Petrolini, A, Petrovich, L, Pierre, F, Pimenta, M, Pingot, O, Plaszczynski, S, Podobrin, O, Pol, Me, Polok, G, Poropat, P, Pozdniakov, V, Privitera, P, Pullia, A, Radojicic, D, Ragazzi, S, Rahmani, H, Ratoff, Pn, Read, Al, Rebecchi, P, Redaelli, Ng, Regler, M, Reid, D, Renton, Pb, Resvanis, Lk, Richard, F, Richardson, M, Ridky, J, Rinaudo, G, Roditi, I, Romero, A, Roncagliolo, I, Ronchese, P, Ronnqvist, C, Rosenberg, Ei, Rossi, S, Rosso, E, Roudeau, P, Rovelli, T, Ruckstuhl, W, Ruhlmannkleider, V, Ruiz, A, Rybicki, K, Saarikko, H, Sacquin, Y, Sajot, G, Salt, J, Sanchez, J, Sannino, M, Schael, S, Schneider, H, Schyns, Mae, Sciolla, G, Scuri, Fabrizio, Segar, Am, Seitz, A, Sekulin, R, Sessa, M, Sette, G, Seufert, R, Shellard, Rc, Siccama, I, Siegrist, P, Simonetti, S, Simonetto, F, Sisakian, An, Skjevling, G, Smadja, G, Smirnova, O, Smith, Gr, Sosnowski, R, Souzasantos, D, Spassoff, Ts, Spiriti, E, Squarcia, S, Staeck, H, Stanescu, C, Stapnes, S, Stavropoulos, G, Stichelbaut, F, Stocchi, A, Strauss, J, Straver, J, Strub, R, Stugu, B, Szczekowski, M, Szeptycka, M, Szymanski, P, Tabarelli, T, Tchikilev, O, Theodosiou, Ge, Tilquin, A, Timmermans, J, Timofeev, Vg, Tkatchev, Lg, Todorov, T, Toet, Dz, Toker, O, Tome, B, Torassa, E, Tortora, L, Treille, D, Trevisan, U, Trischuk, W, Tristram, G, Troncon, C, Tsirou, A, Tsyganov, En, Turala, M, Turluer, Ml, Tuuva, T, Tyapkin, Ia, Tyndel, M, Tzamarias, S, Ueberschaer, S, Ullaland, O, Uvarov, V, Valenti, G, Vallazza, E, Ferrer, Jav, Vandervelde, C, Vanapeldoorn, Gw, Vandam, P, Vanderheijden, M, Vandoninck, Wk, Vaz, P, Vegni, G, Ventura, L, Venus, W, Verbeure, F, Verlato, M, Vertogradov, Ls, Vilanova, D, Vincent, P, Vitale, L, Vlasov, E, Vodopyanov, As, Vollmer, M, Voutilainen, M, Vrba, V, Wahlen, H, Walck, C, Waldner, F, Wehr, A, Weierstall, M, Weilhammer, P, Werner, J, Wetherell, Am, Wickens, Jh, Wilkinson, Gr, Williams, Wsc, Winter, M, Witek, M, Wormser, G, Woschnagg, K, Yamdagni, N, Yepes, P, Zaitsev, A, Zalewska, A, Zalewski, P, Zavrtanik, D, Zevgolatakos, E, Zhang, G, Zimin, Ni, Zito, M, Zuberi, R, Funchal, Rz, Zumerle, G, and Zuniga, J.
Subjects: MU+MU, E+E, ENERGIES, MONTE-CARLO SIMULATION, RADIATIVE-CORRECTIONS, FINAL-STATES, Z0 DECAYS, High Energy Physics::Experiment, Computer Science::Information Theory
Abstract: Based on a sample equivalent to 365 000 hadronic Z0 decays, the search in DELPHI data for pairs of leptons accompanied by a pair of charged particles is described. A total of 11 events were found in the electron channel, 9 in the muon channel and 7 in the tau channel. Results on lepton pairs with a radiated photon are also presented. The data from all channels are compatible with the expectations from standard processes. However, one event was found in the tau channel with an unusually high mass of the charged particle pair.
Published: 1993

30. DETERMINATION OF ALPHA(S) FOR B-QUARKS AT THE Z(0) RESONANCE

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R and ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ and AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F and BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M and BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C and BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B and BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S and BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C and BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T and BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F and CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A and CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P and CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA and CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM and COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G and COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G and CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DAUBIE, E DAUM, A DAUNCEY, PD and DAVENPORT, M DAVID, P DAVIES, J DASILVA, W DEFOIX, C and DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H and DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N and DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H and DICIACCIO, L DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DUPONT, F EDSALL, D and EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G and PEISERT, AE ENGEL, JP ERSHAIDAT, N FASSOULIOTIS, D and FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A and FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ and FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC and FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K and FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C GARCIA, J and GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM and CADENAS, JJGY GOPAL, G GORSKI, M GRACCO, V GRANT, A and GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E and GROSSEWIESMANN, P GROSSETETE, B GUMENYUK, S GUY, J and HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAKANSSON, A and HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P and HERR, H HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E and HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO and HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M and HRUBEC, J HUET, K HULTH, PO HULTQVIST, K IOANNOU, P and IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M and JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F and KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P and KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P and KORATZINOS, M KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C and KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J KRONKVIST, I and KRUENERMARQUIS, U KRUPINSKI, W KULKA, K KURVINEN, K and LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V and LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F and LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J and LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M and LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G and MAILLARD, J MAIO, A MALTEZOS, A MANDL, F MARCO, J and MARGONI, M MARIN, JC MARKOU, A MARON, T MARTI, S and MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G and MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G and MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I and MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U and MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MURYN, B MYATT, G NAVARRIA, FL and NEGRI, P NICOLAIDOU, R NIELSEN, BS NIJJHAR, B and NIKOLAENKO, V NILSEN, PES NISS, P NOMEROTSKI, A and OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A and OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H and PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PETROVYKH, O and PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P POZDNIAKOV, V and PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG and REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F and RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A and RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI and ROSSI, S ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H and SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M and SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F and SEGAR, AM SEITZ, A SEKULIN, R SESSA, M SETTE, G and SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P and SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKJEVLING, G and SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR SOSNOWSKI, R and SOUZASANTOS, D SPASSOFF, TS SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P and TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E TORTORA, L TREILLE, D and TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C and TSIROU, A TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T and TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W and VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D and VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M and VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F and WAYNE, M WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WILKINSON, GR WILLIAMS, WSC and WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P and ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M and ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Lattice, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: The strong coupling constant for b quarks has been determined, and its flavour independence, as predicted by QCD, investigated. The analysis involved events with lepton candidates selected from approximately 356 000 hadronic decays of the Z0, collected by the DELPHI detector at LEP in 1990 and 199 1. A method based on a direct comparison of the three-jet fraction in a b enriched sample, selected by requiring leptons with large momenta and transverse momenta, to that of the entire hadronic sample, illustrated the significant effect of the b quark mass on the multi-jet cross section, and verified the flavour independence of the strong coupling constant to an accuracy of +/- 6%. A second procedure based on a fit to the momentum and transverse momentum spectra of the lepton candidates in both two-jet and three (or more)-jet event samples simultaneously determined the b content in each, and, using second order QCD calculations, gave an absolute measurement of alpha(s) for b quarks of 0. 1 18 +/- 0.004 (stat.) +/- 0.003 (syst.) +/- 0.008 (scale). A comparison with a, for all quark flavours, as measured from the three-jet fraction in all hadronic events, further allowed the coupling strength for b quarks to be expressed in terms relative to that for udsc quarks, thereby cancelling certain common systematic uncertainties, and yielded alpha(s)b/alpha(s)udsc = 1.00 +/- 0.04 (stat.) +/- 0.03 (syst.).
Published: 1993

31. Production of Lambda and Lambda(lambda)over-bar Correlations In the Hadronic Decays of the Z(0)

Author: Abreu, P., Adam, W., Adye, T., Agasi, E., Aleksan, R., Alekseev, G. D., Algeri, A., Allen, P., Almehed, S., Alvsvaag, S. J., Amaldi, U., Andreazza, A., Antilogus, P., Apel, W. D., Apsimon, R. J., Arnoud, Y., Asman, B., Augustin, J. E., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, D. Y., Barker, G. J., Baroncelli, A., Barring, O., Barrio, J. A., Bartl, W., Bates, M. J., Battaglia, M., Baubillier, M., Becks, K. H., Begalli, M., Beilliere, P., Belokopytov, Y., Beltran, P., Benedic, D., Benvenuti, A. C., Berggren, M., Bertrand, D., Bianchi, Fabrizio, Bilenky, M. S., Billoir, P., Bjarne, J., Bloch, D., Blocki, J., Blyth, S., Bocci, V., Bogolubov, P. N., Bolognese, T., Bonesini, M., Bonivento, W., P. S. L., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Bosworth, S., Botner, O., Boudinov, E., Bouquet, B., Bourdarios, C., T. J. V., Bozzo, M., Braibant, S., Branchini, P., Brand, K. D., Brenner, R. A., Briand, H., Bricman, C., Brillault, L., R. C. A., Bruckman, P., Brunet, J. M., Budziak, A., Bugge, L., Buran, T., Burmeister, H., J. A. M., Caccia, M., Calvi, M., A. J. C., Campion, R., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., M. V. C., Cattai, A., Cavallo, F. R., Cerrito, L., Chabaud, V., Chan, A., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, G. A., Chevalier, L., Chliapnikov, P., Chorowicz, V., J. T. M., Cindro, V., Collins, P., Contreras, J. L., Contri, R., Cortina, E., Cosme, G., Couchot, F., Crawley, H. B., Crennell, D., Crosetti, G., Maestro, J. C., Czellar, S., Dahljensen, E., Dalmagne, B., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Daum, A., Dauncey, P. D., Davenport, M., Davies, J., Dasilva, W., Defoix, C., Delpierre, P., Demaria, N., Deangelis, A., Deboeck, H., Deboer, W., Debrabandere, S., Declercq, C., M. D. M., Delavaissiere, C., Delotto, B., Demin, A., Dijkstra, H., Diciaccio, L., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Dupont, F., Edsall, D., Eek, L. O., P. A. M., Ehret, R., Ekelof, T., Ekspong, G., Peisert, A. E., Elsing, M., Engel, J. P., Ershaidat, N., Santo, M. E., Falaleev, V., Fassouliotis, D., Feindt, M., Ferrer, A., Filippas, T. A., Firestone, A., Foeth, H., Fokitis, E., Fontanelli, F., K. A. J., Fousset, J. L., Francon, S., Franek, B., Frenkiel, P., Fries, D. C., Frodesen, A. G., Fuldaquenzer, F., Furstenau, H., Fuster, J., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, E. N., Gerber, J. P., Giacomelli, P., Gillespie, D., Gokieli, R., Golob, B., Golovatyuk, V. M., J. J. G., Gopal, G., Gorn, L., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grossetete, B., Gumenyuk, S., Guy, J., Haedinger, U., Hahn, F., Hahn, M., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., Demonchenault, G. H., Hao, W., Harris, F. J., Hedberg, V., Henkes, T., Henriques, R., Hernandez, J. J., Herquet, P., Herr, H., Hessing, T. L., Hietanen, I., Higgins, C. O., Higon, E., Hilke, H. J., Hodgson, S. D., Hofmokl, T., Holmgren, S. O., Holt, P. J., Holthuizen, D., Honore, P. F., Houlden, M., Hrubec, J., Huet, K., Hulth, P. O., Hultqvist, K., Ioannou, P., Iversen, P. S., Jackson, J. N., Jalocha, P., Jarlskog, G., Jarry, P., Jeanmarie, B., Johansson, E. K., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Kapusta, F., Karlsson, M., Karvelas, E., Katsanevas, S., Katsoufis, E. C., Keranen, R., Khomenko, B. A., Khovanski, N. N., King, B., Kjaer, N. J., Klein, H., Klovning, A., Kluit, P., Kochmehrin, A., Koehne, J. H., Koene, B., Kokkinias, P., Koratzinos, M., Korcyl, K., Korytov, A. V., Kostioukhine, V., Kourkoumelis, C., Kouznetsov, O., Kramer, P. H., Krammer, M., Kreuter, C., Krolikowski, J., Kronkvist, I., Kruenermarquis, U., Kucewicz, W., Kulka, K., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, J. W., Lanceri, L., Lapin, V., Last, I., Laugier, J. P., Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Lesiak, T., Levy, J. M., Lieb, E., Liko, D., Lindgren, J., Lindner, R., Lippi, I., Loerstad, B., Lokajicek, M., Loken, J. G., Lopezfernandez, A., M. A. L., Los, M., Loukas, D., Lozano, J. J., Lutz, P., Lyons, L., Maehlum, G., Maillard, J., Maio, A., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, J. C., Markou, A., Maron, T., Marti, S., Martinezrivero, C., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Medbo, J., Meola, G., Meroni, C., Meyer, W. T., Michelotto, M., Mikulec, I., Mirabito, L., Mitaroff, W. A., Mitselmakher, G. V., Mjoernmark, U., Moa, T., Moeller, R., Moenig, K., Monge, M. R., Morettini, P., Mueller, H., Murray, W. J., Myatt, G., Navarria, F. L., Negri, P., Nemecek, S., Nicolaidou, R., Nielsen, B. S., Nijjhar, B., Nikolaenko, V., P. E. S., Niss, P., Nomerotski, A., Obraztsov, V., Olshevski, A. G., Orava, R., Ostankov, A., Osterberg, K., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T. D., Pape, L., Parodi, F., Passeri, A., Pegoraro, M., Pennanen, J., Peralta, L., Pernegger, H., Pernicka, M., Perrotta, A., Petridou, C., Petrolini, A., Piana, G., Pierre, F., Pimenta, M., Plaszczynski, S., Podobrin, O., Pol, M. E., Polok, G., Poropat, P., Pozdniakov, V., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Rahmani, H., Rames, J., Ratoff, P. N., Read, A. L., Rebecchi, P., Redaelli, N. G., Regler, M., Reid, D., Renton, P. B., Resvanis, L. K., Richard, F., Richardson, J., Ridky, J., Rinaudo, G., Roditi, I., Romero, Alessandra, Roncagliolo, I., Ronchese, P., Ronnqvist, C., Rosenberg, E. I., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmannkleider, V., Ruiz, A., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, J., Sannino, M., Schael, S., Schneider, H., M. A. E., Sciolla, G., Scuri, F., Segar, A. M., Seitz, A., Sekulin, R., Sessa, M., Seufert, R., Shellard, R. C., Siccama, I., Siegrist, P., Simonetti, S., Simonetto, F., Sisakian, A. N., Skjevling, G., Smadja, G., Smirnova, O., Smith, G. R., Sosnowski, R., Souzasantos, D., Spassov, T., Spiriti, E., Squarcia, S., Staeck, H., Stanescu, C., Stapnes, S., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Straver, J., Strub, R., Stugu, B., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tchikilev, O., Theodosiou, G. E., Tilquin, A., Timmermans, J., Timofeev, V. G., Tkatchev, L. G., Todorov, T., Toet, D. Z., Toker, O., Tomaradze, A., Tome, B., Torassa, E., Tortora, L., Treille, D., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E. N., Turluer, M. L., Tuuva, T., Tyapkin, I. A., Tyndel, M., Tzamarias, S., Ueberschaer, S., Ullaland, O., Uvarov, V., Valenti, G., Vallazza, E., J. A. V., Vandervelde, C., Vanapeldoorn, G. W., Vandam, P., Vanderheijden, M., Vandoninck, W. K., Vaneldik, J., Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Verlato, M., Vertogradov, L. S., Vilanova, D., Vincent, P., Vitale, L., Vlasov, E., Vodopyanov, A. S., Vollmer, M., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wehr, A., Weierstall, M., Weilhammer, P., Wetherell, A. M., Wickens, J. H., Wilkinson, G. R., W. S. C., Winter, M., Witek, M., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zanin, M., Zavrtanik, D., Zevgolatakos, E., Zimin, N. I., Zito, M., Zontar, D., Zuberi, R., Zumerle, G., and Zuniga, J.
Subjects: E+E ANNIHILATION, BARYON
Published: 1993

32. SEARCH FOR Z(0) DECAYS TO 2 LEPTONS AND A CHARGED-PARTICLE ANTIPARTICLE PAIR

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R and ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ and AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F and BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M and BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C and BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUDINOV, E and BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H and BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L and BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F and CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A and CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D and CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E and DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J and DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N and DEANGELIS, A DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD and DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A and DIJKSTRA, H DICIACCIO, L DOLBEAU, J DONSZELMANN, M and DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y and DUPONT, F EDSALL, D EEK, LO EEROLA, PAM EHRET, R and EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N and FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A and FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R and FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J and GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U and GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM GOMEZ, JJ CADENAS, Y and GOPAL, G GORN, L GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P and GROSSETETE, B GUMENYUK, S GUY, J HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAKANSSON, A HALLGREN, A and HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H and HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ and HODGSON, SD HOFMOKL, T HOLMGREN, SO HOLTHUIZEN, D and HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HUET, K and HULTH, PO HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B and JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P and KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M and KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R and KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ and KLEIN, H KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORYTOV, AV and KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH and KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U and KRUPINSKI, W KULKA, K KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T and LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R and LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG and LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D and LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J and MAIO, A MALTEZOS, A MANDL, F MARCO, J MARGONI, M and MARIN, JC MARKOU, A MARON, T MARTI, S MATORRAS, F and MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT and MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA and MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ and MURYN, B MYATT, G NAVARRIA, FL NEGRI, P NICOLAIDOU, R and NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES and NISS, P NOMEROTSKI, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M and PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F and PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L and PEREVOZCHIKOV, V PERNEGGER, H PERNICKA, M PERROTTA, A and PETRIDOU, C PETROLINI, A PETROVICH, L PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S PODOBRIN, O POL, ME and POLOK, G POROPAT, P POZDNIAKOV, V PRIVITERA, P PULLIA, A and RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG REGLER, M REID, D and RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSO, E and ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V and RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G and SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H and SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A and SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC and SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F and SISAKIAN, AN SKJEVLING, G SMADJA, G SMIRNOVA, O SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOFF, TS SPIRITI, E and SQUARCIA, S STAECK, H STANESCU, C STAPNES, S and STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J and STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M and SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE and TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG and TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E and TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M and TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S and UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G and VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW and VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M and VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V and WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M and WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH and WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A and ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E and ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ and ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment, Computer Science::Information Theory
Abstract: Based on a sample equivalent to 365000 hadronic Z0 decays, the search in DELPHI data for pairs of leptons accompanied by a pair of charged particles is described. A total of 11 events were found in the electron channel, 9 in the muon channel and 7 in the tau channel. Results on lepton pairs with a radiated photon are also presented. The data from all channels are compatible with the expectations from standard processes. However, one event was found in the tau channel with an unusually high mass of the charged particle pair.
Published: 1993

33. EVIDENCE FOR B(S)(0) MESON PRODUCTION IN Z(0) DECAYS

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD and ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G and BARDIN, DY BARONCELLI, A BARRING, O BARRIO, JA BARTL, W and BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH and BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y and BELOUS, K BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P and BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN and BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL and BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B and BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C and BOWCOCK, TJV BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD and BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H and BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C and GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V and CHAN, A CHAPKIN, M CHARPENTIER, P CHAUSSARD, L and CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L and CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G and CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E and DALMANGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E and DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DASILVA, W and DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W and DECLERCQ, C DELASO, MDM DEGROOT, N DELAVAISSIERE, C and DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DJAMA, F and DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DZHELYADIN, R EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEINDT, M FENYUK, A ALONSO, MF and FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S and FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J and GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C and GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP and GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM and CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V and GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E and GROSSEWIESMANN, P GROSSETETE, B GUMENYUK, S GUY, J and HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAJDUK, Z and HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH and HAO, W HARRIS, FJ HENKES, T HERNANDEZ, JJ HERQUET, P and HERR, H HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E and HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO and HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M and HRUBEC, J HUET, C HULTH, PO HULTQVIST, K IOANNOU, P and ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P and JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G and KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATARGIN, A and KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J and KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H and KLEMPT, W KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORCYL, K KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETOV, O KRAMER, PH KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KULKA, K KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LEVY, JM and LIEB, E LIKO, D LILLETHUN, E LINDGREN, J LINDNER, R and LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M and LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D and LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J and MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC and MARKOU, A MARON, T MARTI, S MATHIS, L MATORRAS, F and MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M and MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT and MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA and MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ and MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NEGRI, P and NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P and OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A and OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H and PAPADOPOULOU, TD PAPE, L PASSERI, A PEGORARO, M and PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A and PETRIDOU, C PETROLINI, A PETTERSEN, TE PIERRE, F and PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P and PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D and RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M and RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONJIN, V RONNQVIST, C ROSENBERG, EI and ROSSI, S ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T and RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H and SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M and SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R and SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S and SIMONETTO, F SISAKIAN, AN SKAALI, TB SKJEVLING, G and SMADJA, G SMIRNOV, N SMITH, GR SOSNOWSKI, R SPASSOFF, TS and SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C and STAPNES, S STAVROPOULOS, G STICHELBAUT, F STOCCHI, A and STRAUSS, J STRAVER, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S TCHIKILEV, O and THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG and TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOMARADZE, A and TORASSA, E TORTORA, L TRAINOR, MT TREILLE, D and TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A and TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O and UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDONINCK, WK and VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F and VERTOGRADOV, LS VILANOVA, D VINCENT, P VISHNEVSKY, N and VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEHR, A WEIERSTALL, M WEILHAMMER, P and WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G and WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G and ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G and ZUNIGA, J
Subjects: High Energy Physics::Phenomenology, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract: Seven unambiguous events out of a sample of 270 000 Z0 decays, contain in tile same jet a D(s) meson and a muon at large transverse momentum relative to the et axis. These events are direct evidence for B(s)0 meson production in hadronic Z0 decays. The production rate of these events, relative to all hadronic Z0 decays is ( 18 +/- 8) x 10(-5) this number including the relevant branching fractions of the B(s)0 and D(s). The value of the B(s)0 meson lifetime relative to the average B meson lifetime is measured to be 0.8 +/- 0.4.
Published: 1992

34. MULTIPLICITY FLUCTUATIONS IN HADRONIC FINAL-STATES FROM THE DECAY OF THE Z(0)

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD and ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G and BARDIN, DY BARKER, G BARONCELLI, A BARRING, O BARRIO, JA and BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y and BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M and BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J and BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P and BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S and BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV and BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA and BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA and CACCIA, M CALVI, M ROZAS, AJC CAMPORESI, T CANALE, V and CAO, F CARENA, F CARROLL, L CASO, C GIMENEZ, MVC and CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R and CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S and DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G and DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P and DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S and DELPIERRE, P DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N and DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H and DICIACCIO, L DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y EEK, LO and EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G PEISERT, AE and ENGEL, JP FASSOULIOTIS, D FEARNLEY, TA FEINDT, M and ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H and FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL and FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG and FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H and FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J and GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM and CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V and GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E and GROSSEWIESMANN, P GROSSETETE, B GUY, J HAEDINGER, U and HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A and HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H and HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ and HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO and HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J and HUET, C HULTH, PO HULTQVIST, K IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G and JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M and JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN and KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A and KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P and KOPF, M KORCYL, K KORYTOV, AV KOSTIOUKHINE, V and KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J and KRONKVIST, I KRUENERMARQUIS, U KRUPINSKI, W KULKA, K and KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW and LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G and LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LEVY, JM LIEB, E LIKO, D LILLETHUN, E and LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I and LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A and AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P and LYONS, L MAEHLUM, G MAILLARD, J MALTEZOS, A MANDL, F and MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T and MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G and MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I and MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U and MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MURYN, B MYATT, G NARAGHI, F and NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P OBRAZTSOV, V OLSHEVSKI, AG and ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M and PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PASSERI, A and PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PETTERSEN, TE and PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G and POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REDAELLI, NG and REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F and RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A and RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI and ROSSI, S ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T and RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K and SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J and SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G and SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G and SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P and SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKAALI, TB and SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C and STAPNES, S STAVROPOULOS, G STICHELBAUT, F STOCCHI, A and STRAUSS, J STRAVER, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S TCHIKILEV, O and THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG and TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TORASSA, E and TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M and TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S and UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G and VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW and VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS and VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOULGARIS, G VOUTILAINEN, M VRBA, V and WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEHR, A and WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM and WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N and YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D and ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R and FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment
Abstract: An analysis of the fluctuations in the phase space distribution of hadrons produced in the decay of 78829 Z0 has been carried out, using the method of factorial moments. The high statistics collected by the DELPHI experiment at LEP during 1990 allowed studies of the event sample both globally and in intervals of p(t) and multiplicity, and for different jet topologies and for single jets. A large contribution to the factorial moments of the one-dimensional data on rapidity with respect to the event axis comes from hard gluons. Details of factorial moments in two and three dimensions are presented. Influences of resonance decays have been studied by Monte Carlo simulation: one-dimensional factorial moments at low p(t), and two-, three-dimensional analyses are affected. Parton shower models describe the data reasonably well.
Published: 1992

35. PRODUCTION OF STRANGE PARTICLES IN THE HADRONIC DECAYS OF THE Z(0)

Author: ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T and ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ and ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY and BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V and BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M and BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H and BOSIO, C BOSTJANCIC, B BOTNER, O BOUQUET, B and BOURDARIOS, C BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA and BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H and BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC and CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F and CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A and CAVALLO, FR CERRITO, L CHAN, A CHAPKIN, M and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D and CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S and DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P and DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H and DEBOER, W DECLERCQ, C DELASO, MDMD DEGROOT, N and DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H and DICIACCIO, L DJAMA, F DOLBEAU, J DOLL, O DONSZELMANN, M and DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y and DULINSKI, W EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G and PEISERT, AE ENGEL, JP FALALEEV, V FASSOULIOTIS, D and FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A and FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F and FORBES, KAJ FORSBACH, H FRANEK, B FRENKIEL, P FRIES, DC and FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K and FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P and GAZIS, EN GERBER, JP GIACOMELLI, P GLITZA, KW GOKIELI, R and GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G and GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E and GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B and GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z and HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH and HARRIS, FJ HECK, BW HENKES, T HERBST, I HERNANDEZ, JJ and HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E and HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M and HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P and ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P and JARLSKOG, G JEANMARIE, B JOHANSSON, EK JOHNSON, D and JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G and KAPUSTA, F KATSANEVAS, S KATSOUFIS, EC KERANEN, R and KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ and KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M and KORATZINOS, M KORCYL, K KORYTOV, AV KOURKOUMELIS, C and KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J and KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K and LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V and LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F and LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LETESSIERSELVON, A LIEB, E LIKO, D LILLETHUN, E and LINDGREN, J LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B and LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL and LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAGNUSSEN, N MAILLARD, J MALTEZOS, A and MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A and MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G and MATVEEV, M MAZZUCATO, M MCCUBBIN, M MCKAY, R and MCNULTY, R MENICHETTI, E MEOLA, G MERONI, C MEYER, WT and MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MURYN, B MYATT, G NARAGHI, F and NAUKORZEN, U NAVARRIA, FL NEGRI, P NIELSEN, BS and NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OESTERBERG, K and OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M and PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A and PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M and PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O POL, ME and POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D and RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F and RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A and RONCAGLIOLO, I RONCHESE, P RONJIN, V RONNQVIST, C and ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T and RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K and SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E and SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M and SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P and SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB and SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C and STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J and STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P and TABARELLI, T TAVERNIER, S THEODOSIOU, GE TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TORASSA, E TORTORA, L TRAINOR, MT and TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R and TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S and UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O UVAROV, V and VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C and VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F and VERTOGRADOV, LS VILANOVA, D VITALE, L VLASOV, E and VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S and VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C and WALDNER, F WAYNE, M WEILHAMMER, P WERNER, J and WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR and WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment
Abstract: An analysis of the production of strange particles from the decays of the Z0 boson into multihadronic final states is presented. The analysis is based on about 90 000 selected hadronic Z0 decays collected by the DELPHI detector at LEP in 1990. K(s)0, K* +/-, LAMBDA(LAMBDABAR) and XI- (XI+) have been identified by their characteristic decays. The measured production cross sections are compared with predictions of the Lund Monte Carlo tuned to data at PEP/PETRA energies.
Published: 1992

36. SEARCHES FOR HEAVY NEUTRINOS FROM Z-DECAYS

Author: ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T and ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ and ASMAN, B ASTIER, P AUGUSTIN, JE AUGUSTINUS, A BAILLON, P and BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ and BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ and BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P and BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M and BONESINI, M BONIVENTO, W BOOTH, PSL BORATAV, M BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B and BOTNER, O BOUQUET, B BOURDARIOS, C BOZZO, M BRAIBANT, S and BRANCHINI, P BRAND, KD BRENNER, RA BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T and BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC and CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHAPKIN, M and CHARPENTIER, P CHAUSSARD, L CHECCHIA, P CHELKOV, GA and CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G and COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M and MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E and DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E and DAUNCEY, PD DAVENPORT, M DAVID, P DEFOIX, C DELIKARIS, D and DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A and DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD and DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A and DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DOLL, O and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DULINSKI, W DZHELYADIN, R EEK, LO EEROLA, PAM and EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP and FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P and FONTANELLI, F FORBES, KAJ FORSBACH, H FRANEK, B and FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R and FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J and GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C and GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP and GIACOMELLI, P GLITZA, KW GOKIELI, R GOLOVATYUK, VM and CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V and GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E and GROSSEWIESMANN, P GROSSETETE, B GUY, J HAHN, F HAHN, M and HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A and HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW and HENKES, T HERBST, I HERNANDEZ, JJ HERQUET, P HERR, H and HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD and HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D and HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO and HULTQVIST, K HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F and KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J and KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H and KLEMPT, W KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M and KORCYL, K KORYTOV, AV KOSTIUKHIN, V KOURKOUMELIS, C and KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J and KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K and LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V and LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F and LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LETESSIERSELVON, A LIEB, E LIKO, D LILLETHUN, E and LINDGREN, J LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B and LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL and LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAGNUSSEN, N MAILLARD, J MALTEZOS, A and MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A and MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G and MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R and MENICHETTI, E MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M and MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAUKORZEN, U and NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B and NIKOLAENKO, V OBRAZTSOV, V OESTERBERG, K OLSHEVSKI, AG and ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M PAIN, R and PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M and PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A and PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G and POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D and RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M and RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, U and ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V and RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G and SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN and SKAALI, TB SKJEVLING, G SMADJA, G SMIRNOV, N SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F and STOCCHI, A STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S TCHIKILEV, O and THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG and TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TORASSA, E and TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN and TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA and TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDONINCK, WK and VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W and VERBEURE, F VERTOGRADOV, LS VIBERT, L VILANOVA, D and VITALE, L VLASOV, E VLASOV, EV VLASSOPOULOS, S and VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G and VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F and WAYNE, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M and WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P and ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D and ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R and FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: We have searched for possible fourth family heavy neutrinos, pair produced in Z0 decays, in a sample of about 112 000 hadronic Z0 final states collected with the DELPHI detector. For all mixing matrix elements we exclude a new Dirac neutrino lighter than 44.5 GeV at a 95% confidence level, if the neutrino couples to the electron or muon family, and lighter than 44.0 GeV, if the neutrino couples to the tau family. Depending on the values of the mixing element and to which lepton family the neutrino couples, we obtain mass limits up to 46.2 GeV. For all mixing matrix elements we exclude a new Majorana neutrino lighter than 39.0 GeV, if it couples to the electron or the muon family, and lighter than 38.2 GeV, if it couples to the tau family. Depending on the values of the mixing matrix element and to which lepton family the neutrino couples, we obtain mass limits up to 44.7 GeV. We also exclude stable new Dirac neutrinos lighter than 45.0 GeV and new Majorana neutrinos lighter than 39.5 GeV.
Published: 1992

37. A SEARCH FOR NEUTRAL HIGGS PARTICLES IN Z(0) DECAYS

Author: ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T and ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ and ASMAN, B ASTIER, P AUGUSTIN, JE AUGUSTINUS, A BAILLON, P and BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ and BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ and BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P and BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M and BONESINI, M BONIVENTO, W BOOTH, PSL BORATAV, M BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B and BOTNER, O BOUQUET, B BOZZO, M BRAIBANT, S BRANCHINI, P and BRAND, KD BRENNER, RA BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H and BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A and CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L and CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHARPENTIER, P CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D and CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S and DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P and DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C and LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B and DEMIN, A DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P and DEMARIA, N DERKAOUI, J DICIACCIO, L DIJKSTRA, H and DJAMA, F DOLBEAU, J DOLL, O DONSZELMANN, M DOROBA, K and DRACOS, M DREES, J DRIS, M DUFOUR, Y DULINSKI, W and EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE and ENGEL, JP FASSOULIOTIS, D FEINDT, M FENYUK, A ALONSO, MF and FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H and FOKITIS, E FOLEGATI, P FONTANELLI, F FORBES, KAJ and FORSBACH, H FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG and FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H and FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J and GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GLITZA, KW GOKIELI, R GOLOVATYUK, VM and CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V and GRANT, A GRARD, F GRAZIANI, E GROS, MH GROSDIDIER, G and GROSS, E GROSSETETE, B GROSSEWIESMANN, P GUMENYUK, S and GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z and HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH and HARRIS, FJ HECK, BW HENKES, T HERBST, I HERNANDEZ, JJ and HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E and HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONOREPF HOOPER, JE HOULDEN, M and HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P and ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P and JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G and KALMUS, G KAPUSTA, F KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P and KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOSTRIKOV, M and KOURKOUMELIS, C KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I and KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W and KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW and LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G and LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIKO, D LIEB, E and LILLETHUN, E LINDGREN, J LIPNIACKA, A LIPPI, I LLOSA, R and LOERSTAD, B LOKAJICEK, M LOKEN, JG AGUERA, MAL and LOPEZFERNANDEZ, A LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ and LUCOCK, R LUTZ, P LYONS, L MAEHLUM, G MAGNUSSEN, N and MAILLARD, J MALTEZOS, A MANDL, F MARCO, J MARGONI, M and MARIN, JC MARKOU, A MARTI, S MATHIS, L MATORRAS, F and MATTEUZZI, C MATTHIAE, G MATVEEV, M MAZZUCATO, M and MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MEOLA, G and MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA and MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ and MYATT, G NARAGHI, F NAUKORZEN, U NAVARRIA, FL NEGRI, P and NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V and OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M and PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A and PEGORARO, M PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A and PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G and POROPAT, P PRIVITERA, P PULLIA, A PYYHTIA, J RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG and REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F and RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A and RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI and ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M and SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE and SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G and SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S and SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G and SMADJA, G SMITH, GR SMIRNOV, N SOSNOWSKI, R SPASSOFF, TS and SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C and STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J and STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P and TABARELLI, T TAVERNIER, S THEODOSIOU, G TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U and TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T and TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B and UEBERSCHAER, S ULLALAND, O UVAROV, VA VALENTI, G and VALLAZZA, E FERRER, JAV VANAPELDOORN, GW VANDAM, P and VANDONINCK, WK VANDERVELDE, C VARELA, J VAZ, P VEGNI, G and VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS and VIBERT, L VILANOVA, D VITALE, L VLASOV, EV VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G and VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F and WAYNE, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M and WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P and ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D and ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R and FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: The search in DELPHI data for neutral Higgs bosons is described. No candidate for the Standard Model Higgs is seen in Z0 decays to H-0-nu-nuBAR, H-0-mu+-mu- or H-0-tau+-tau- after selections that proved efficient for finding simulated H-0. One remaining candidate for Z0 –> H-0e+ e- is consistent with background. Together with our earlier studies, these results restrict the H-0 mass to be above 38 GeV/c2 at the 95% confidence level. No signal is found for decays of Minimal Supersymmetric Standard Model neutral Higgs bosons to tau+-tau-. Limits are obtained for their decays to produce four jets.
Published: 1992

38. Classification of the hadronic decays of the Z$^0$ into b and c quark pairs using a neural network

Author: Abreu, P., Adam, W., Adye, T., Agasi, E., Alekseev, G. D., Algeri, A., Allen, P., Almehed, S., Alvsvaag, S. J., Amaldi, U., Anassontzis, E. G., Andreazza, A., Antilogus, P., Apel, W. D., Apsimon, R. J., Asman, B., Augustin, J. E., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, D. Y., Barker, G., Baroncelli, A., Barring, O., Barrio, J. A., Bartl, W., Bates, M. J., Battaglia, M., Baubillier, M., Becks, K. H., Beeston, C. J., Begalli, M., Beilliere, P., Belokopytov, Y., Beltran, P., Benedic, D., Benvenuti, A. C., Berggren, M., Bertrand, D., Bianchi, F., Bilenky, M. S., Billoir, P., Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolubov, P. N., Bolognese, T., Bonesini, M., Bonivento, W., P. S. L., Borgeaud, P., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Bosworth, S., Botner, O., Bouquet, B., Bourdarios, C., T. J. V., Bozzo, M., Braibant, S., Branchini, P., Brand, K. D., Brenner, R. A., Briand, H., Bricman, C., R. C. A., Brummer, N., Brunet, J. M., Bugge, L., Buran, T., Burmeister, H., J. A. M., Caccia, M., Calvi, M., A. J. C., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., Caso, C., M. V. C., Cattai, A., Cavallo, F. R., Cerrito, L., Chabaud, V., Chan, A., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, G. A., Chevalier, L., Chliapnikov, P., Chorowicz, V., J. T. M., Ciuchini, M., Clara, M. P., Collins, P., Contreras, J. L., Contri, R., Cortina, E., Cosme, G., Cosmo, G., Couchot, F., Crawley, H. B., Crennell, D., Crosetti, G., Crozon, M., Maestro, J. C., Czellar, S., Dahljensen, E., Dalmagne, B., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Daum, A., Dauncey, P. D., Davenport, M., David, P., Dasilva, W., Defoix, C., Delikaris, D., Delorme, S., Delpierre, P., Delgiudice, P., Demaria, N., Deangelis, A., Debeer, M., Deboeck, H., Deboer, W., Declercq, C., M. D. M., Degroot, N., Delavaissiere, C., Delotto, B., Demin, A., Dijkstra, H., Diciaccio, L., Diama, F., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Eek, L. O., P. A. M., Ehret, R., Ekelof, T., Ekspong, G., Peisert, A. E., Engel, J. P., Fassouliotis, D., Feindt, M., Alonso, M. F., Ferrer, A., Filippas, T. A., Firestone, A., Foeth, H., Fokitis, E., Fontanelli, F., K. A. J., Fousset, J. L., Francon, S., Franek, B., Frenkiel, P., Fries, D. C., Frodesen, A. G., Fruhwirth, R., Fuldaquenzer, F., Furnival, K., Furstenau, H., Fuster, J., Galeazzi, G., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, E. N., Gerber, J. P., Giacomelli, P., Gokieli, R., Golob, B., Goloyatyuk, V. M., J. J. G., Goobar, A., Gopal, G., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grossewiesmann, P., Grossetete, B., Gumenyuk, S., Guy, J., Haedinger, U., Hahn, F., Hahn, M., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., Demonchenault, G. H., Hao, W., Harris, F. J., Henkes, T., Hernandez, J. J., Herquet, P., Herr, H., Hessing, T. L., Hietanen, I., Higgins, C. O., Higon, E., Hilke, H. J., Hodgson, S. D., Hofmokl, T., Holmes, R., Holmgren, S. O., Holthuizen, D., Honore, P. F., Hooper, J. E., Houlden, M., Hrubec, J., Huet, C., Hulth, P. O., Hultqvist, K., Ioannou, P., Isenhower, D., Iversen, P. S., Jackson, J. N., Jalocha, P., Jarlskog, G., Jarry, P., Jeanmarie, B., Johansson, E. K., Johnson, D., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalkkinen, J., Kalmus, G., Kapusta, F., Karlsson, M., Karvelas, E., Katsanevas, S., Katsoufis, E. C., Keranen, R., Kesteman, J., Khomenko, B. A., Khovanski, N. N., King, B., Kjaer, N. J., Klein, H., Klempt, W., Klovning, A., Kluit, P., Kochmehrin, A., Koehne, J. H., Koene, B., Kokkinias, P., Kopf, M., Korcyl, K., Korytov, A. V., Kostioukhine, V., Kourkoumelis, C., Kouznetsov, O., Kramer, P. H., Krolikowski, J., Kronkvist, I., Kruenermarquis, U., Kucewicz, W., Kulka, K., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, J. W., Lanceri, L., Lapin, V., Laugier, J. P., Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Lesiak, T., Levy, J. M., Lieb, E., Liko, D., Lindgren, J., Lindner, R., Lipniacka, A., Lippi, I., Loerstad, B., Lokajicek, M., Loken, J. G., Lopezfernandez, A., M. A. L., Los, M., Loukas, D., Lozano, J. J., Lutz, P., Lyons, L., Maehlum, G., Maillard, J., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, J. C., Markou, A., Maron, T., Marti, S., Mathis, L., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Meola, G., Meroni, C., Meyer, W. T., Michelotto, M., Mikulec, I., Mirabito, L., Mitaroff, W. A., Mitselmakher, G. V., Mjoernmark, U., Moa, T., Moeller, R., Moenig, K., Monge, M. R., Morettini, P., Mueller, H., Murray, W. J., Myatt, G., Naraghi, F., Navarria, F. L., Negri, P., Nielsen, B. S., Nijjhar, B., Nikolaenko, V., P. E. S., Niss, P., Obraztsov, V., Olshevski, A. G., Orava, R., Ostankov, A., Osterberg, K., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T. D., Pape, L., Passeri, A., Pegoraro, M., Pennanen, J., Perevozchikov, V., Pernicka, M., Perrotta, A., Petridou, C., Petrolini, A., Petrovykh, L., Pettersen, T. E., Pierre, F., Pimenta, M., Pingot, O., Plaszczynski, S., Pol, M. E., Polok, G., Poropat, P., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Rahmani, H., Ratoff, P. N., Read, A. L., Redaelli, N. G., Regler, M., Reid, D., Renton, P. B., Resvanis, L. K., Richard, F., Richardson, M., Ridky, J., Rinaudo, G., Roditi, I., Romero, Alessandra, Roncagliolo, I., Ronchese, P., Ronnqvist, C., Rosenberg, E. I., Rossi, S., Rossi, U., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmannkleider, V., Ruiz, A., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, J., Sannino, M., Schael, S., Schneider, H., Schulze, B., M. A. E., Sciolla, G., Scuri, F., Segar, A. M., Sekulin, R., Sessa, M., Sette, G., Seufert, R., Shellard, R. C., Siccama, I., Siegrist, P., Simonetti, S., Simonetto, F., Sisakian, A. N., Skaali, T. B., Skjevling, G., Smadja, G., Smith, G. R., Sosnowski, R., Spassoff, T. S., Spiriti, E., Squarcia, S., Staeck, H., Stanescu, C., Stapnes, S., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Straver, J., Strub, R., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tavernier, S., Tchikilev, O., Theodosiou, G. E., Tilquin, A., Timmermans, J., Timofeev, V. G., Tkatchev, I. G., Todorov, T., Toet, D. Z., Toker, O., Torassa, E., Tortora, L., Treille, D., Trevisan, U., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E. N., Turluer, M. L., Tuuva, T., Tyapkin, I. A., Tyndel, M., Tzamarias, S., Ueberschaer, S., Ullaland, O., Uvarov, V., Valenti, G., Vallazza, E., J. A. V., Vandervelde, C., Vanapeldoorn, G. W., Vandam, P., Vanderheijden, M., Vandoninck, W. K., Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Vertogradov, L. S., Vilanova, D., Vincent, P., Vitale, L., Vlasov, E., Vodopyanov, A. S., Vollmer, M., Voulgaris, G., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wayne, M., Wehr, A., Weierstall, M., Weilhammer, P., Werner, J., Wickens, J. H., Wikne, J., Wilkinson, G. R., W. S. C., Winter, M., Witek, M., Wormald, D., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zhang, G., Zimin, N. I., Zito, M., Zuberi, R., Funchal, R. Z., Zumerle, G., Zuniga, J., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), DELPHI, Delphi, Collaboration, Abreu, P., Adam, W., Canale, Vincenzo, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)
Subjects: Quark, Nuclear and High Energy Physics, Particle physics, LUND MONTE-CARLO, HEAVY FLAVOR PRODUCTION, JET FRAGMENTATION, PHYSICS, BOSON, Electron–positron annihilation, Flavour, Hadron, MathematicsofComputing_GENERAL, Computer Science::Digital Libraries, 01 natural sciences, Charm quark, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Physics, Artificial neural network, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, TheoryofComputation_GENERAL, MathML, Computer Science::Mathematical Software, High Energy Physics::Experiment, Física nuclear, Classifier (UML), Particle Physics - Experiment
Abstract: A classifier based on a feed-forward neural network has been used for separating a sample of about 123 500 selected hadronic decays of the Z 0 , collected by DELPHI during 1991, into three classes according to the flavour of the original quark pair: u u +d d +s s (unresolved), c c and b b . The classification has been used to compute the partial widths of the Z 0 into b and c quark pairs. This gave Γ c c /Γ h = 0.151 ± 0.008 ( stat. ) ± 0.041 ( syst. ) , Γ b b /Γ h = 0.232±0.005 ( stat. )±0.017 ( syst. ) .
Published: 1992
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39. CLASSIFICATION OF THE HADRONIC DECAYS OF THE Z0 INTO B-QUARK AND C-QUARK PAIRS USING A NEURAL NETWORK

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD and ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G and BARDIN, DY BARKER, G BARONCELLI, A BARRING, O BARRIO, JA and BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y and BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M and BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J and BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P and BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S and BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV and BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA and BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA and CACCIA, M CALVI, M ROZAS, AJC CAMPORESI, T CANALE, V and CAO, F CARENA, F CARROLL, L CASO, C GIMENEZ, MVC and CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM CIUCHINI, M CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COSMO, G COUCHOT, F and CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M and MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M and DAMGAARD, G DARBO, G DAUBIE, E DAUM, A DAUNCEY, PD and DAVENPORT, M DAVID, P DASILVA, W DEFOIX, C and DELIKARIS, D DELORME, S DELPIERRE, P DELGIUDICE, P and DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W and DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C and DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DIAMA, F and DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y EEK, LO EEROLA, PAM EHRET, R and EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA and FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P and FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F and FURNIVAL, K FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D and GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R and GOLOB, B GOLOYATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G and GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E and GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B and GUMENYUK, S GUY, J HAEDINGER, U HAHN, F HAHN, M and HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K and DEMONCHENAULT, GH HAJDUK, Z HAKANSSON, A HALLGREN, A and HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL and HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD and HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D and HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HUET, C and HULTH, PO HULTQVIST, K IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALKKINEN, J KALMUS, G and KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S and KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA and KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W and KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B and KOKKINIAS, P KOPF, M KORCYL, K KORYTOV, AV and KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH and KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KUCEWICZ, W and KULKA, K KURVINEN, K LACASTA, C LAMBROPOULOS, C and LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R and LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LEVY, JM LIEB, E and LIKO, D LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I and LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A and AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P and LYONS, L MAEHLUM, G MAILLARD, J MALTEZOS, A MANDL, F and MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T and MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G and MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I and MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U and MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MYATT, G NARAGHI, F NAVARRIA, FL and NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V and NILSEN, PES NISS, P OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R and OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PASSERI, A and PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PETROVYKH, L and PETTERSEN, TE PIERRE, F PIMENTA, M PINGOT, O and PLASZCZYNSKI, S POL, ME POLOK, G POROPAT, P PRIVITERA, P and PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J and RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSI, U and ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHULZE, B SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F and SISAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR and SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T and TAVERNIER, S TCHIKILEV, O THEODOSIOU, GE TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, IG TODOROV, T TOET, DZ TOKER, O TORASSA, E TORTORA, L TREILLE, D and TREVISAN, U TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M and TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V and VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C and VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK and VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F and VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOULGARIS, G VOUTILAINEN, M and VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M and WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J WALDNER, F and WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC and WINTER, M WITEK, M WORMALD, D WORMSER, G WOSCHNAGG, K and YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment, Nuclear Experiment
Abstract: A classifier based on a feed-forward neural network has been used for separating a sample of about 123 500 selected hadronic decays of the Z0, collected by DELPHI during 1991, into three classes according to the flavour of the original quark pair: uuBAR + ddBAR + ssBAR (unresolved), ccBAR and bbBAR. The classification has been used to compute the partial widths of the ZO into b and c quark pairs. This gave GAMMA(ccBAR)/GAMMA(h) = 0.151 +/- 0.008 (stat.) +/- 0.041 (syst.), GAMMA(bbBAR)/GAMMA(h) = 0.232 +/- 0.005 (stat.) +/- 0.017 (syst.).
Published: 1992

40. A MEASUREMENT OF B-MESON PRODUCTION AND LIFETIME USING DL- EVENTS IN Z(0) DECAYS

Author: Abreu, P., Adam, W., Adye, T., Agasi, E., Alekseev, Gd, Algeri, A., Allen, P., Almehed, S., Alvsvaag, Sj, Amaldi, U., Anassontzis, Eg, Andreazza, A., Antilogus, P., Apel, Wd, Apsimon, Rj, Asman, B., Augustin, Je, Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, Dy, Barker, Gj, Baroncelli, A., Barring, O., Barrio, Ja, Bartl, W., Bates, Mj, Battaglia, M., Baubillier, M., Becks, Kh, Beeston, Cj, Begalli, M., Beilliere, P., Belokopytov, Y., Beltran, P., Benedic, D., Benvenuti, Ac, Berggren, M., Bertrand, D., Bianchi, F., Bilenky, Ms, Billoir, P., Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolubov, Pn, Bolognese, T., Bonesini, M., Bonivento, W., Booth, Psl, Borgeaud, P., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Bosworth, S., Botner, O., Bouquet, B., Bourdarios, C., Bowcock, Tjv, Bozzo, M., Braibant, S., Branchini, P., Brand, Kd, Brenner, Ra, Briand, H., Bricman, C., Brown, Rca, Brummer, N., Brunet, Jm, Bugge, L., Buran, T., Burmeister, H., Buytaert, Jama, Caccia, M., Calvi, M., Rozas, Ajc, Campion, R., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., Caso, C., Gimenez, Mvc, Cattai, A., Cavallo, Fr, Cerrito, L., Chabaud, V., Chan, A., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, Ga, Chavalier, L., Chliapnikov, P., Chorowicz, V., Chrin, Jtm, Clara, Mp, Collins, P., Contreras, Jl, Contri, R., Cortina, E., Cosme, G., Couchot, F., Crawley, Hb, Crennell, D., Crosetti, G., Crozon, M., Maestro, Jc, Czellar, S., Dahljensen, E., Dalmagne, B., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Daum, A., Dauncey, Pd, Davenport, M., David, P., Davies, J., Dasilva, W., Defoix, C., Delikaris, D., Delorme, S., Delpierre, P., Demaria, N., Deangelis, A., Debeer, M., Deboeck, H., Deboer, W., Declercq, C., Laso, Mdmd, Degroot, N., Delavaissiere, C., Delotto, B., Demin, A., Dijkstra, H., Diciaccio, L., Djama, F., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Eek, Lo, Eerola, Pam, Ehret, R., Ekelof, T., Ekspong, G., Peisert, Ae, Engel, Jp, Ershaidat, N., Fassouliotis, D., Feindt, M., Alonso, Mf, Ferrer, A., Filippas, Ta, Firestone, A., Foeth, H., Fokitis, E., Fontanelli, F., Forbes, Kaj, Fousset, Jl, Francon, S., Franek, B., Frenkiel, P., Fries, Dc, Frodesen, Ag, Fruhwirth, R., Fuldaquenzer, F., Furnival, K., Furstenau, H., Fuster, J., Galeazzi, G., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, En, Gerber, Jp, Giacomelli, P., Gokieli, R., Golob, B., Golovatyuk, Vm, Cadenas, Jjgy, Goobar, A., Gopal, G., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grossewiesmann, P., Grossetete, B., Gumenyuk, S., Guy, J., Haedinger, U., Hahn, F., Hahn, M., Haider, S., Hakansson, A., Hallgren, A., Hamacher, K., Demonchenault, Gh, Hao, W., Harris, Fj, Henkes, T., Hernandez, Jj, Herquet, P., Herr, H., Hessing, Tl, Hietanen, I., Higgins, Co, Higon, E., Hilke, Hj, Hodgson, Sd, Hofmokl, T., Holmes, R., Holmgren, So, Holthuizen, D., Honore, Pf, Hooper, Je, Houlden, M., Hrubec, J., Huet, K., Hulth, Po, Hultqvist, K., Ioannou, P., Isenhower, D., Iversen, Ps, Jackson, Jn, Jalocha, P., Jarlskog, G., Jarry, P., Jeanmarie, B., Johansson, Ek, Johnson, D., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Kapusta, F., Karlsson, M., Karvelas, E., Katsanevas, S., Katsoufis, Ec, Keranen, R., Kesteman, J., Khomenko, Ba, Khovanski, Nn, King, B., Kjaer, Nj, Klein, H., Klempt, W., Klovning, A., Kluit, P., Kochmehrin, A., Koehne, Jh, Koene, B., Kokkinias, P., Kopf, M., Korcyl, K., Korytov, Av, Kostioukhine, V., Kourkoumelis, C., Kouznetsov, O., Kramer, Ph, Krolikowski, J., Kronkvist, I., Kruenermarquis, U., Krupinski, W., Kulka, K., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, Jw, Lanceri, L., Lapin, V., Laugier, Jp, Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Lesiak, T., Levy, Jm, Lieb, E., Liko, D., Lindgren, J., Lindner, R., Lipniacka, A., Lippi, I., Loerstad, B., Lokajicek, M., Loken, Jg, Lopezfernandez, A., Aguera, Mal, Los, M., Loukas, D., Lozano, Jj, Lutz, P., Lyons, L., Maehlum, G., Maillard, J., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, Jc, Markou, A., Maron, T., Marti, S., Mathis, L., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Meola, G., Meroni, C., Meyer, Wt, Michelotto, M., Mikulec, I., Mirabito, L., Mitaroff, Wa, Mitselmakher, Gv, Mjoernmark, U., Moa, T., Moeller, R., Moenig, K., MONGE, MR, Morettini, P., Mueller, H., Murray, Wj, Muryn, B., Myatt, G., Navarria, Fl, Negri, P., Nielsen, Bs, Nijjhar, B., Nikolaenko, V., Nilsen, Pes, Niss, P., Obraztsov, V., Olshevski, Ag, Orava, R., Ostankov, A., Osterberg, K., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, Td, Pape, L., Passeri, A., Pegoraro, M., Pennanen, J., Perevozchikov, V., Pernicka, M., Perrotta, A., Petridou, C., Petrolini, A., Petrovykh, L., Pettersen, Te, Pierre, F., Pimenta, M., Pingot, O., Plaszczynski, S., Pol, Me, Polok, G., Poropat, P., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Rahmani, H., Ratoff, Pn, Read, Al, Redaelli, Ng, Regler, M., Reid, D., Renton, Pb, Resvanis, Lk, Richard, F., Richardson, M., Ridky, J., Rinaudo, G., Roditi, I., Romero, A., Roncagliolo, I., Ronchese, P., Ronnqvist, C., Rosenberg, Ei, Rossi, S., Rossi, U., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmannkleider, V., Ruiz, A., Rybicki, K., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, J., Sannino, M., Schael, S., Schneider, H., Schulze, B., Schyns, Mae, Sciolla, G., Scuri, F., Segar, Am, Sekulin, R., Sessa, M., Sette, G., Seufert, R., Shellard, Rc, Siccama, I., Siegrist, P., Simonetti, S., Simonetto, F., Sisakian, An, Skaali, Tb, Skjevling, G., Smadja, G., Smith, Gr, Sosnowski, R., Spassoff, Ts, Spiriti, E., Squarcia, S., Staeck, H., Stanescu, C., Stapnes, S., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Straver, J., Strub, R., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tavernier, S., Tchikilev, O., Theodosiou, Ge, Tilquin, A., Timmermans, J., Timofeev, Vg, Tkatchev, Lg, Todorov, T., Toet, Dz, Toker, O., Ezio Torassa, Torassa, E., Tortora, L., Treille, D., Trevisan, U., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, En, Turala, M., Turluer, Ml, Tuuva, T., Tyapkin, Ia, Tyndel, M., Tzamarias, S., Ueberschaer, S., Ullaland, O., Uvarov, V., Valenti, G., Vallazza, E., Ferrer, Jav, Vandervelde, C., Vanapeldoorn, Gw, Vandam, P., Vanderheijden, M., Vandoninck, Wk, Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Vertogradov, Ls, Vilanova, D., Vincent, P., Vitale, L., Vlasov, E., Vodopyanov, As, Vollmer, M., Voulgaris, G., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wayne, M., Wehr, A., Weierstall, M., Weilhammer, P., Werner, J., Wetherell, Am, Wickens, Jh, Wikne, J., Wilkinson, Gr, Williams, Wsc, Winter, M., Witek, M., Wormald, D., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zhang, G., Zimin, Ni, Zito, M., Zuberi, R., Funchal, Rz, Zumerle, G., Zuniga, J., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), DELPHI, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU)
Subjects: Quark, CHARMED MESONS, Particle physics, HEAVY FLAVOR PRODUCTION, E+E ANNIHILATION, Physics and Astronomy (miscellaneous), Energy Fraction, Meson, LUND MONTE-CARLO, Electron–positron annihilation, 01 natural sciences, JET FRAGMENTATION, Nuclear physics, PHYSICS, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], B meson, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous), Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Mean value, Hadronization, High Energy Physics::Experiment, Particle Physics - Experiment, Lepton
Abstract: A study of B meson decays into DlX final states is presented. In these events, neutral and charged D mesons originate predominantly from B+ and B0 decays, respectively. The dilution of this correlation due to D** production has been taken into account. From 263 700 hadronic Z0 decays collected in 1991 with the DELPHI detector at the LEP collider, 92 D0→K-π+, 35 D+→K-π+π+ and 61 D*0→D0π+ followed by D0→K-π+ or D0→K-π+π+π -, are found with an associated lepton of the same charge as the kaon. From the D0l- and D*+l-, the probability fd that a b quark hadronizes into a B- (or {Mathematical expression}) meson is found to be 0.44 ±0.08±0.09, corresponding to a total (Bs+Λb) hadronization fraction of 0.12-0.12+0.24. By reconstructing the energy of each B meson, the b quark fragmentation is directly measured for the first time. The mean value of the B meson energy fraction is: {Mathematical expression} Reconstructing D-lepton vertices, the following B lifetimes are measured: {Mathematical expression} and an average τ(B)=1.23-0.13+0.14(stat.)±0.15(syst.) ps is found. Allowing for decays into {Mathematical expression}, the B+ and B0 lifetimes are: {Mathematical expression} © 1993 Springer-Verlag.
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41. DETERMINATION OF ALPHA-S IN 2ND-ORDER QCD FROM HADRONIC-Z DECAYS

Author: Abreu, P., Adam, W., Adami, F., Adye, T., Akesson, T., Alekseev, Gd, Allen, P., Almehed, S., Alvsvaag, Sj, Amaldi, U., Anassontzis, E., Antilogus, P., Apel, Wd, Apsimon, Rj, Asman, B., Augustin, Je, Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, Dy, Baroncelli, A., Barring, O., Bartl, W., Bates, Mj, Battaglia, M., Baubillier, M., Becks, Kh, Beeston, Cj, Begalli, M., Beilliere, P., Belokopytov, Y., Beltran, P., Benedic, D., Benlloch, Jm, Berggren, M., Bertrand, D., Bianchi, F., Bilenky, Ms, Billoir, P., Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolubov, Pn, Bolognese, T., Bonapart, M., Bonesini, M., Bonivento, W., Booth, Psl, Borgeaud, P., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Botner, O., Bouquet, B., Bourdarios, C., Bozzo, M., Braibant, S., Branchini, P., Brand, Kd, Brenner, Ra, Briand, H., Bricman, C., Brown, Rca, Brummer, N., Brunet, Jm, Bugge, L., Buran, T., Burmeister, H., Buytaert, Jama, Caccia, M., Calvi, M., Rozas, Ajc, Campion, A., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., Caso, C., Castelli, E., Gimenez, Mvc, Cattai, A., Cavallo, Fr, Cerrito, L., Chan, A., Chapkin, M., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, Ga, Chevalier, L., Chliapnikov, P., Chorowicz, V., Cirio, R., Clara, Mp, Collins, P., Contreras, Jl, Contri, R., Cosme, G., Couchot, F., Crawley, Hb, Crennell, D., Crosetti, G., Crozon, M., Maestro, Jc, Czellar, S., Dagoret, S., Dahljensen, E., Dalmagne, B., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Dauncey, Pd, Davenport, M., David, P., Dasilva, W., Defoix, C., Delikaris, D., Delorme, S., Delpierre, P., Demaria, N., Deangelis, A., Debeer, M., Deboeck, H., Deboer, W., Declercq, C., Laso, Mdmd, Degroot, N., Delavaissiere, C., Delotto, B., Demin, A., Dijkstra, H., Diciaccio, L., Djama, F., Dolbeau, J., Doll, O., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Dulinski, W., Eek, Lo, Eerola, Pam, Ekelof, T., Ekspong, G., Peisert, Ae, Engel, Jp, Fassouliotis, D., Feindt, M., Fenyuk, A., Alonso, Mf, Ferrer, A., Filippas, Ta, Firestone, A., Foeth, H., Fokitis, E., Folegati, P., Fontanelli, F., Forbes, Kaj, Franek, B., Frenkiel, P., Fries, Dc, Frodesen, Ag, Fruhwirth, R., Fuldaquenzer, F., Furnival, K., Furstenau, H., Fuster, J., Galeazzi, G., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, En, Gerber, Jp, Giacomelli, P., Gokieli, R., Golovatyuk, Vm, Cadenas, Jjgy, Goobar, A., Gopal, G., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grossewiesmann, P., Grossetete, B., Guy, J., Hahn, F., Hahn, M., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., Demonchenault, Gh, Harris, Fj, Heck, Bw, Henkes, T., Hernandez, Jj, Herquet, P., Herr, H., Hietanen, I., Higgins, Co, Higon, E., Hilke, Hj, Hodgson, Sd, Hofmokl, T., Holmes, R., Holmgren, So, Holthuizen, D., Honore, Pf, Hooper, Je, Houlden, M., Hrubec, J., Hulth, Po, Hultqvist, K., Husson, D., Ioannou, P., Isenhower, D., Iversen, Ps, Jackson, Jn, Jalocha, P., Jarlskog, G., Jarry, P., Jeanmarie, B., Johansson, Ek, Johnson, D., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Kapusta, F., Karlsson, M., Katsanevas, S., Katsoufis, Ec, Keranen, R., Kesteman, J., Khomenko, Ba, Khovanski, Nn, King, B., Kjaer, Nj, Klein, H., Klempt, W., Klovning, A., Kluit, P., Kochmehrin, A., Koehne, Jh, Koene, B., Kokkinias, P., Kopf, M., Koratzinos, M., Korcyl, K., Korytov, Av, Kostiukhin, V., Kourkoumelis, C., Kramer, Ph, Kreuzberger, T., Krolikowski, J., Kronkvist, I., Krstic, J., Krunermarquis, U., Krupinski, W., Kucewicz, W., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, Jw, Lanceri, L., Lapin, V., Laugier, Jp, Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Letessierselvon, A., Lieb, E., Liko, D., Lillethun, E., Lindgren, J., Lindner, R., Lipniacka, A., Lippi, I., Llosa, R., Loerstad, B., Lokajicek, M., Loken, Jg, Lopezfernandez, A., Aguera, Mal, Los, M., Loukas, D., Lounis, A., Lozano, Jj, Lutz, P., Lyons, L., Maehlum, G., Magnussen, N., Maillard, J., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, Jc, Markou, A., Maron, T., Marti, S., Mathis, L., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Meola, G., Meroni, C., Meyer, Wt, Michelotto, M., Mitaroff, Wa, Mitselmakher, Gv, Mjoernmark, U., Moa, T., Moeller, R., Monig, K., MONGE, MR, Morettini, P., Mueller, H., Murray, Wj, Muryn, B., Myatt, G., Naraghi, F., Navarria, Fl, Negri, P., Nielsen, Bs, Nijjhar, B., Nikolaenko, V., Obraztsov, V., Oesterberg, K., Olshevski, Ag, Orava, R., Ostankov, A., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T., Pape, L., Passeri, A., Pegoraro, M., Pennanen, J., Perevozchikov, V., Pernicka, M., Perrotta, A., Pierre, F., Pimenta, M., Pingot, O., Pol, Me, Polok, G., Poropat, P., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Ratoff, Pn, Read, Al, Redaelli, Ng, Regler, M., Reid, D., Renton, Pb, Resvanis, Lk, Richard, F., Richardson, M., Jan Ridky, Rinaudo, G., Roditi, I., Romero, A., Roncagliolo, I., Ronchese, P., Ronjin, V., Ronnqvist, C., Rosenberg, Ei, Rossi, U., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmann, V., Ruiz, A., Rybicki, K., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, E., Sanchez, J., Sannino, M., Schaeffer, M., Schael, S., Schneider, H., Schyns, Mae, Scuri, F., Segar, Am, Sekulin, R., Sessa, M., Sette, G., Seufert, R., Shellard, Rc, Siegrist, P., Simonetti, S., Simonetto, F., Sissakian, An, Skaali, Tb, Skjevling, G., Smadja, G., Smith, Gr, Sosnowski, R., Spassoff, Ts, Spiriti, E., Squarcia, S., Staeck, H., Stanescu, C., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Strub, R., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tavernier, S., Tchikilev, O., Theodosiou, Ge, Tilquin, A., Timmermans, J., Timofeev, Vg, Tkatchev, Lg, Todorov, T., Toet, Dz, Toker, O., Tomaradze, A., Torassa, E., Tortora, L., Trainor, Mt, Treille, D., Trevisan, U., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, En, Turala, M., Turchetta, R., Turluer, Ml, Tuuva, T., Tyapkin, Ia, Tyndel, M., Tzamarias, S., Uberschar, B., Uberschar, S., Ullaland, O., Uvarov, V., Valenti, G., Vallazza, E., Ferrer, Jav, Vandervelde, C., Vanapeldoorn, Gw, Vandam, P., Vandominck, Wk, Varela, J., Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Vertogradov, Ls, Vilanova, D., Vishnevsky, N., Vitale, L., Vlasov, E., Vlassopoulos, S., Vodopyanov, As, Vollmer, M., Volponi, S., Voulgaris, G., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wayne, M., Wehr, A., Weierstall, M., Weilhammer, P., Werner, J., Wetherell, Am, Wickens, Jh, Wikne, J., Wilkinson, Gr, Williams, Wsc, Winter, M., Wormald, D., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zhang, G., Zimin, Ni, Zito, M., Zitoun, R., Funchal, Rz, Zumerle, G., and Zuniga, J.
Subjects: QUANTUM CHROMODYNAMICS, INELASTIC MUON SCATTERING, LUND MONTE-CARLO, ENERGIES, JET PRODUCTION-RATES, E+E-ANNIHILATION, PERTURBATION-THEORY, HIGH Q2, SIMULATION, RESONANCE

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