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LIMITS ON THE PRODUCTION OF SCALAR LEPTOQUARKS FROM Z(0) DECAYS AT LEP
Authors :
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
Publication Year :
1993
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).
Details
Language :
English
Database :
OpenAIRE
Accession number :
edsair.od......2127..dcc7913e995feb90d2cb065607420c97