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1. Study of the leptonic decays of the Z0 boson

Author

A. Klovning, U. Mjoernmark, Sandor Czellar, G. Polok, M. Bozzo, V.A. Uvarov, A. Ruiz, Ugo Gasparini, Paolo Pasini, P. Queru, W. K. Van Doninck, F. Richard, C. Matteuzzi, M. Hahn, B. Bouqquet, A. G. Frodesen, Andrey Korytov, Jan Krolikowski, N. N. Khovanski, W. Bartl, B. V. Batyunia, R. Pain, B. Koene, E. Lieb, A. Sebastia, I. Lippi, E.N. Tsyganov, J. H. Wickens, Jose Luis Contreras, C. Vander Velde, C. Lambropoulos, Ugo Amaldi, E. Zevgolatakos, R. Rongved, S. Almehed, C. Pinori, J. P. Laugier, J.A.M.A. Buytaert, A.N. Diddens, U. Kruener-Marquis, M. Gorbics, J.A. Lidbury, D. Radojicic, J.P. Grillet, M. Pimenta, N. De Groot, M. De Beer, G. Wormser, Ariella Cattai, Jacques Lemonne, A. Stocchi, Guido Barbiellini, M. Pernicka, G. Lenzen, J. E. Campagne, M. Koratzinos, L. Guglielmi, M. Bonapart, Wolfgang Adam, D. Bertrand, Francesco Navarria, Paolo Morettini, J. G. Loken, J.F. Genat, B. Kisielewski, Paolo Ronchese, T. Kreuzberger, J.C. Raoul, G. Goujon, G. Crosetti, Evgueni Vlasov, M. Nigro, Jan Ridky, A. S. Vodopianov, Tuure Tuuva, Clara Troncon, Itzhak Roditi, Gueorgui Chelkov, J. Guy, B. Dalmagne, M. Kopf, J. N. Jackson, P. Kokkinias, M. Passeneau, S. Ferroni, Z. Hajduk, F. Udo, G. Petrucci, M. Nordberg, R. Lauhakangas, H. Herr, Winfried Mitaroff, P. Beltran, Louis Lyons, C.W. Salgado, J. Mas, P. Lutz, G. Tristram, P. Laurikainen, S. Du, Paula Eerola, O. Ullaland, F. Djama, C. Gaspar, S. Haider, D.N. Edwards, C. Caso, M. Sessa, V. Castillo Gimenez, P. Negri, Tim Adye, C. De La Vaissiere, Laurent Chevalier, U. Trevisan, N. Crosland, J.V. Allaby, M. Jonker, Y. Sacquin, Maciej Górski, A. B. Fenyuk, L. Mattsson, J.J. Jaeger, Tiziano Rovelli, M. Cresti, J.H. Bibby, G.P. Barreira, B. Lund-Jensen, G. E. Kalmus, G. D. Alekseev, J. M. Yelton, A. Passeri, S. Gawne, Klaus Hamacher, A. Firestone, G. Kantardjian, C. De Clerco, Milos Lokajicek, K. Woschnagg, M. Nonni, P. Branchini, J. Krstic, Göran Jarlskog, W. Bell, N. I. Zimin, Stavros Maltezos, Mikael Berggren, H. Hofmann, J. Cuevas Maestro, H. B. Crawley, V. Lepeltier, H. Forsbach, F. Fulda-Quenzer, T. Bolognese, E. C. Katsoufis, G. Gopal, A. Letessier-Selvon, S. Gumenyuk, Nikolai Smirnov, V. Ruhlmann, O. Barring, G. Zhang, Paolo Checchia, B. Franek, W. Kucewicz, G. Matthiae, C. Stanescu, L.J. Carroll, M. L. Turluer, M. Vollmer, D. Reid, Ph. Gavillet, P. Spentzouris, E. Graziani, B. Jean-Marie, A. Hakansson, E. J. Sanchez, W. D. Apel, S. J. Alvsvaag, Roland Horisberger, L. Bugge, G. Hamel de Monchenault, E. G. Anassontzis, J. P. Engel, I. Kontaxis, P. Lorenz, P. Roudeau, M. J. Bates, Edoardo Castelli, D. Z. Toet, J. Joensuu, J. M. Brunet, H. Lebbolo, Josef Strauss, R. Llosa, N. Bingefors, P. Van Dam, M. Fernandez Alonso, P. Privitera, M.V. Reis, P. Weilhammer, Luc Pape, D. Imbault, R. Zitoun, D. Langerveld, P. Abreu, P. Borgeaud, Borge Svane Nielsen, M. H. Gros, F. J. Harris, H. Foeth, P. Allen, Gianni Zumerle, F. Astesan, Toralf Bernhard Skaali, Maria Roberta Monge, S. Barlag, A. Zalewska, Valery Pozdnyakov, G. Cabras, Krzysztof Doroba, Chiara Meroni, A.K. Topphol, C. Brand, M. Mc Cubbin, G. Ekspong, K. Hultqvist, Renato Turchetta, B. Grossetete, Allan Hallgren, B. Korzen, P. Poropat, G. Damgaard, C. Poiret, L. Tortora, Giovanni Valenti, I. Belokopytov, M. Boratav, D. Gamba, G. Voulgaris, Sverker Johansson, W. T. Meyer, Pierre Billoir, Mogens Dam, K. Rybicki, W. Venus, B. Muryn, V. Obraztsov, P. Aarnio, V. Gracco, M. Schaeffer, Andre Augustinus, P. Herquet, H. Palka, G. Skjevling, R. Contri, Giovanni Darbo, S. Simonetti, M. Voutilainen, G. Grosdidier, R. Sekulin, R. Dzhelyadin, T. Pettersen, Jose M. Benlloch, A. Grant, R.B. Kadyrov, F. Barao, P. V. Chliapnikov, M. Crozon, Craig Buttar, A. De Angelis, D. Delikaris, N. van Eijndhoven, J. Werner, L. Viseu Melo, E. Sundell, M.I. Laakso, Daniel Bloch, Hans Dijkstra, I. Herbst, Katri Huitu, T.K. Truong, B. Goret, M. Baubillier, R. Lucock, Alessandra Romero, Georgios Stavropoulos, J.M. Noppe, M. Turala, Barry King, Ahmimed Ouraou, Pavlos Ioannou, F. Simonetto, R. Gokieli, A. Tilquin, J. Perez, I.A. Gritsaenko, G. Leder, G. B. Chadwick, E. Higon, R. Seufert, V.M. Golovatyuk, W.S.C. Williams, Daniel Treille, J. J. Hernandez, R. Frühwirth, Manolis Dris, J. Pyythia, B. Åsman, P. Adrianos, C. J. Beeston, F. Scuri, Juan Fuster, N.K. Vishnevskij, A. M. Zaitsev, E. K. Johansson, J. E. Hooper, J.C. Le Grand, J. Timmermans, J. Pagot, A. Pullia, J.-E. Augustin, A. M. Wetherell, E. Lillethun, T. Moa, G. Maehlum, K. Pakonski, F. Bianchi, J. Michałowski, Kjell Fransson, L. Lanceri, D. Husson, J. Barlow, E. Vela, Lucio Cerrito, T. Buran, J.B.M. Pattison, I. A. Tyapkin, M. A. Houlden, D. Crennell, F. Mandl, A. Pinsent, A.M. Romaya, M. Ellila, Guenakh Mitselmakher, A.J. Camacho Rozas, D. Vilanova, G. Smadja, D.Yu. Barbin, S. Squarcia, K. W. Glitza, A. Zinchenko, E. Menichetti, Olga Botner, Krzysztof Korcyl, H. Saarikko, T. Hofmokl, Marek Szczekowski, N. Dimitriou, Stefano Ragazzi, José Salt, F. Couchot, R. Sosnowski, B. W. Heck, E. Rosso, H. Klein, H. Schneider, V. G. Timofeev, S. Nounos, J.-P. Vanuxem, Panos Kostarakis, M.-H. Gros, A. Markou, F. Cao, V. Falaleev, E. Lillestol, V. Chorowicz, O.A. Maeland, R. Downs, J. Haissinski, S. Braibant, Tord Ekelof, H. Staeck, G. Galeazzi, R. Strub, B. Loerstad, K. Moenig, S. Cairanti, H. Burmeister, D. Sacco, M. Mazzucato, E. Fokitis, Robert S. Brown, J. Drees, P. Szymanski, Patrick Jarry, M. Winter, G. Rinaudo, Evangelos Gazis, G. Vegni, N. Brummer, W. H. Range, E. Spiriti, B.D. Hyams, E. I. Rosenberg, K. Kurvinen, M. Dracos, R. Ragazzon, P. Siegrist, J-C. Marin, M. Davenport, B. Grung, A. A. Rademakers, S. O. Holmgren, D. Benedic, D. Loukas, George Kalkanis, P. B. Renton, M. Flinn, L. O. Eek, R. C. Shellard, L. Di Ciaccio, Josef Hrubec, A. M. Segar, D. C. Fries, G. Kuhn, P. S. Iversen, F. Fontanelli, J. Skeens, C. Astor Ferreres, J. Velasco, Marta Calvi, L. Tkachev, Vincenzo Canale, Geoffrey Smith, G. W. Van Apeldoorn, G. Sette, L.S. Curwen, W. Dulinski, L. Ventura, Håkan T Johansson, B. Lavigne, S. Palma Lopes, S. Quinton, Hans Muller, T. Odegaard, P. N. Bogolubov, Christine Kourkoumelis, E. Dahl-Jensen, H. De Boeck, M. Tyndel, P. Vaz, D. Bollini, M. Pegoraro, J. Maillard, P. Jalocha, S. Biagi, H. P. Borner, V. Kadyshevskiy, V. Perevozchikov, Theodora Papadopoulou, Tiziano Camporesi, N. G. Redaelli, P. Frenkiel, R. Moeller, A. Baroncelli, A. Hrisoho, H. J. Hilke, C. Bosio, F. Waldner, K. D. Brand, Antonio Ferrer, Roberto Cirio, L. K. Resvanis, C. Walck, G. E. Theodosiou, M. Zito, O. Pingot, K. Spang, E. Sanchis, L. Mathis, Massimo Caccia, N. Yamdagni, Paul Baillon, Alexander Lincoln Read, Vladimir Nikolaenko, M. Szeptycka, P. Juillot, M. Mur, M.A. Lopez Aguera, Francesca Romana Cavallo, Mitchell Wayne, V. V. Lapin, P. O. Hulth, F. Rossel, P. Delpierre, E. Daubie, G. Myatt, J.M. Gago, Joao Varela, P. Kluit, P. R. S. Gomes, S. Ueberschaer, A. Maltezos, M. Gaillard, A. Campion, R. Zukanovich Funchal, H. Wahlen, Ariel Goobar, D. Fraissard, K. H. Becks, P. Antilogus, M. E. Veitch, J. Bjarne, W. Klempt, F. Hahn, F. Stichelbaut, R. Mc Kay, Cesare Chiccoli, F. Adami, M. Barranco-Luque, R. Keranen, Philippe Charpentier, Mario Sannino, R. Orava, S. Topp-Jorgensen, Maria Elena Pol, S. Katsanevas, T. A. Filippas, M. Regler, Yu. Sedykh, B. Van Eijk, H. Mueller, J. Dolbeau, P. Folegati, P.S.L. Booth, P. N. Ratoff, J. J. Gómez Cadenas, J. Marco, M. P. Clara, Piotr Zalewski, 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 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, Heyd, Yvette, Abreu, P., Adam, W., Canale, Vincenzo, 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), and 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)

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Electron–positron annihilation, Hadron, Width ratio, 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, Physique des particules élémentaires, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Neutrino, 010306 general physics, Particle Physics - Experiment, Lepton, Boson
Abstract

Measurements are presented of the cross section ratios Rℓ = σℓ(e+e-→ℓ+ℓ -)/σhh(e+e-→hadrons) for ℓ = e, μ and τ using data taken from a scan around the Z0. The results are Re = (5.09±0.32±0.18)%, Rμ = (4.96±0.35±0.17)% and Rτ,=(4.72±0.38± 0.29)% where, for the ratio Re, the t-channel contribution has been subtracted. These results are consistent with the hypothesis of lepton universality and test this hypothesis at the energy scale s ∼ 8300 GeV2. The absolute cross sections σℓ(e+e-→ℓ +ℓ-) have also been measured. From the cross sections the leptonic partial widths Γe = (83.2±3.0±2.4) MeV, (ΓeΓμ) 1/2=(84.6±3.0±2.4) MeV and (ΓeΓτ) 1/2=(82.6±3.3±3.2) MeV have been extracted. Assuming lepton universality the ratio Γℓ/Γh=(4.89±0.20± 0.12) × 10-2 was obtained, together with Γℓ=(83.6±1.8±2.2) MeV. The number of light neutrino species is determined to be Nv=3.12±0.24±0.25. Al the data are consistent with the predictions of the standard model., 0, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
1990

2. Study of Hadronic decays of the Z$^0$ Boson

Author

M. Nordberg, R. Lauhakangas, M. Gorbics, G. Crosetti, Evgueni Vlasov, Gueorgui Chelkov, M. Sessa, E. Lieb, L. Mathis, B. Grung, Ugo Gasparini, N. Crosland, H. Herr, W. A. Mitaroff, Ariella Cattai, D.Yu. Bardin, N. Dimitriou, N. Yamdagni, A. Sadovsky, J. Drees, Paul Baillon, R. Gokieli, M. Bonapart, Klaus Hamacher, Louis Lyons, Guido Barbiellini, J. Guy, E. Graziani, P. Laurikainen, G. Ekspong, Alexander Lincoln Read, M. Szeptycka, F. Richard, Demetrios Loukas, C. Matteuzzi, O. Ullaland, M. E. Veitch, Giovanni Darbo, F. Couchot, A. Markou, S. Simonetti, George Kalkanis, P. B. Renton, J. Bjarne, Tim Adye, S. Gumenyuk, S. J. Alvsvaag, M. Hahn, Phillip Allport, U. Trevisan, S. Almehed, Th. D. Papadopoulou, M. Ellila, J. Dolbeau, D. C. Fries, Guenakh Mitselmakher, P. Antilogus, Evangelos Gazis, W.S.C. Williams, P. Folegati, P.S.L. Booth, P. N. Ratoff, P. Negri, V. Ruhlmann, J. Joensuu, J. Skeens, B. Franek, C. Pinori, Tiziano Rovelli, M. Cresti, E. C. Katsoufis, Marta Calvi, G. Stavropoulos, V. Chorowicz, G. Rinaudo, E. Menichetti, S. Gawne, José Salt, F. Hahn, Stefano Ragazzi, Roland Horisberger, M. Mur, L. Bugge, J.H. Bibby, A. J. Camacho Rozas, D. Z. Toet, Charles Bricman, L. Tkachev, P. Abreu, P. Borgeaud, G. Kantardjian, P. Branchini, C. Gaspar, M. Gaillard, Geoffrey Smith, F. Simonetto, H. Schneider, M. Dracos, M. Fernandez Alonso, J.M. Noppe, T. Buran, J.B.M. Pattison, C. Poiret, M. Jonker, Göran Jarlskog, S. Nounos, A. Letessier-Selvon, Mogens Dam, J. P. Engel, V. Obraztsov, H. Forsbach, G. Polok, O.A. Maeland, J. J. Gómez Cadenas, A. B. Fenyuk, G. Zhang, G. Damgaard, A. Tilquin, S. Du, G. Leder, M. P. Clara, G. W. Van Apeldoorn, E. Sundell, W. D. Apel, Luca Tortora, I. Roncagliolo, R. Lucock, O. Pingot, Luc Pape, F. Stichelbaut, R. Mc Kay, H. Hofmann, V. Lepeltier, E. Castelli, L. Ventura, G. Galeazzi, A. Ferrer, E. K. Johansson, C. Bosio, B. Åsman, D. Crennell, F. Mandl, P. Beltran, Paolo Checchia, G. Smadja, E. Lillestöl, D. Husson, G. Hamel de Monchenault, Josef Strauss, P. Herquet, P. Adrianos, C. J. Beeston, A. Pinsent, Håkan T Johansson, E. Zevgolatakos, R. Contri, Francesca Romana Cavallo, Mitchell Wayne, B. Lavigne, M. Turala, G. Vegni, Olga Botner, Krzysztof Korcyl, Ph. Gavillet, S. Squarcia, V. Gracco, Maria Elena Pol, S. Katsanevas, W. Venus, M. Regler, Cesare Chiccoli, M. Mazzucato, P. Szymanski, A. G. Frodesen, J. P. Gerber, A. Sebastia, S. Palma Lopes, S. Quinton, G. Wormser, W. Kucewicz, N. Bingefors, Panos Kostarakis, M.-H. Gros, Manolis Dris, P. Roudeau, H. Foeth, B. Koene, S. Braibant, V. V. Lapin, E. Vela, J. Velasco, H. Saarikko, Tord Ekelof, H. Staeck, F. Adami, M. Barranco-Luque, Hans Muller, R. Sekulin, K. W. Glitza, B. Korzen, T. Moa, G. Maehlum, Z. Hajduk, S. Barlag, Maciej Górski, P. N. Bogolubov, R. Keranen, Philippe Charpentier, K. Spang, L. Cerrito, K. Rybicki, R.B. Kadyrov, P. Privitera, E. Sanchis, E. Lillethun, J. Barlow, G. Borisov, B. Goret, M. Baubillier, G. B. Chadwick, C. De Clercq, J. Pagot, Yu. Sedykh, M. A. Houlden, M. Pernicka, Piotr Zalewski, U. Kruener-Marquis, Paolo Ronchese, K. Moenig, E. Fokitis, G. D. Alekseev, R. Llosa, B. Van Eijk, A.N. Diddens, P. Siegrist, Jesus Marco, H. Mueller, F. Rossel, M. Davenport, A. Campion, A. Hakansson, E. Dahl-Jensen, Tuure Tuuva, B. Loerstad, R. Strub, J. E. Campagne, I. A. Tyapkin, Jerzy Michalowski, C. Stanescu, R. Downs, Craig Buttar, M. Koratzinos, A. De Angelis, G. Petrucci, J. E. Augustin, D. Langerveld, B. W. Heck, C. Vander Velde, Paolo Morettini, D. Delikaris, A. M. Zaitsev, N. van Eijndhoven, S. Cairanti, J. Werner, H. J. Hilke, L. Viseu Melo, H. Burmeister, D. Sacco, V. Vrba, J. G. Loken, Didier Imbault, C. Lambropoulos, Ugo Amaldi, V. Castillo Gimenez, P. V. Chliapnikov, R. Zukanovich Funchal, Marc Winter, J. M. Yelton, W. Bell, M. Mc Cubbin, K. Hultqvist, P. Kokkinias, Daniel Bloch, A. S. Vodopianov, L. Mattsson, Mario Sannino, Andrea Perrotta, J. Krstic, M. A. Lopez Aguera, Ahmimed Ouraou, V.M. Golovatyuk, V.A. Uvarov, Robert S. Brown, J. Mas, A. Hrisoho, N. I. Zimin, K. Pakonski, G. Sette, F. Bianchi, L.S. Curwen, C. Troncon, H. Wahlen, Ariel Goobar, R. Orava, Fernand Grard, P. Vaz, N. Brummer, M. Tyndel, Wolfgang Adam, J.F. Genat, T. Kreuzberger, J.C. Raoul, G. Goujon, W. Van Doninck, J-C. Marin, P. Queru, L. Guglielmi, Maria Roberta Monge, A. Zalewska, S. Topp-Jorgensen, J.-P. Vanuxem, J.C. Le Grand, Kjell Fransson, M. Innocente, R. Pain, O. Barring, W. H. Range, B. Bouquet, W. T. Meyer, Jacques Lemonne, S. Maltezos, D. Fraissard, K. H. Becks, C. Kourkoumelis, J. Pyyhtia, R. Rongved, D. Bollini, J. Haissinski, H. Lebbolo, M. Kopf, A. Passeri, Patrick Jarry, V. Falaleev, A. Romero, Daniel Treille, T. Odegaard, P. Van Dam, M. Schaeffer, P. Billoir, F. Astesan, J. N. Jackson, C.W. Salgado, S. Biagi, H. P. Borner, P. Weilhammer, A.M. Romaya, S. Haider, J.V. Allaby, D. Vilanova, C. Caso, Renato Turchetta, R. Zitoun, M. Passeneau, F. Fulda-Quenzer, C. De La Vaissiere, P. Spentzouris, S. Ferroni, B. Jean-Marie, B.D. Hyams, B. Kisielewski, P. Aarnio, J. M. Brunet, E. I. Rosenberg, Pawel Jalocha, Barry King, K. Kurvinen, C. Brand, R. Frühwirth, R. Ragazzon, J. Timmermans, M. De Beer, M. Pegoraro, J. Maillard, R. Dzhelyadin, Chiara Meroni, G. Tristram, Paula Eerola, T. Pettersen, Jose M. Benlloch, A. Grant, D.N. Edwards, M. Boratav, M.I. Laakso, Hans Dijkstra, J. Perez, Y. Sacquin, V. Perevozchikov, Tiziano Camporesi, G. E. Kalmus, T. Bolognese, J. Cuevas Maestro, H. B. Crawley, A. Baroncelli, N. G. Redaelli, Marco Bozzo, A. Firestone, P. Frenkiel, P. Ioannou, F. Waldner, K. D. Brand, C. Walck, Stefaan Tavernier, M. Vollmer, D. Bertrand, I. Kontaxis, M. S. Bilenky, L.J. Carroll, G. Lenzen, A. A. Rademakers, R. Moeller, S. O. Holmgren, L. S. Vertogradov, T.K. Truong, B. Grossetete, Allan Hallgren, Giovanni Valenti, M. Flinn, V. Lapchine, L. O. Eek, R. C. Shellard, Josef Hrubec, A. M. Segar, G. Kuhn, P. S. Iversen, F. Fontanelli, C. Astor Ferreres, P. Lorenz, M.V. Reis, G.P. Barreira, B. Lund-Jensen, Roberto Cirio, H. Palka, G. Skjevling, M. L. Turluer, D. Reid, F. Barao, I. Belokopytov, L. K. Resvanis, M. Zito, E. Anassontzis, Katri Huitu, E. Higon, R. Seufert, F. Scuri, Gianni Zumerle, A. M. Wetherell, L. Lanceri, L. Di Ciaccio, P. Poropat, I. Lippi, Andre Augustinus, Massimo Caccia, E.N. Tsyganov, J. H. Wickens, W. Dulinski, B. Muryn, Jose Luis Contreras, Vladimir Nikolaenko, P. Juillot, F. Djama, J.A. Lidbury, M. Berggren, A. Klovning, D. Radojicic, J.P. Grillet, Joao Varela, U. Mjoernmark, P. R. S. Gomes, S. Ueberschaer, F. Udo, P. Lutz, A. Maltezos, Paolo Pasini, J. J. Hernandez, P. O. Hulth, P. Delpierre, E. Daubie, G. Myatt, J.M. Gago, Jan Krolikowski, N. N. Khovanski, W. Bartl, M. Nigro, B. Dalmagne, Laurent Chevalier, K. Woschnagg, G. Gopal, Milos Lokajicek, J. Kesteman, F. J. Harris, A.K. Topphol, J. E. Hooper, E. J. Sanchez, G. Matthiae, V. Canale, M. J. Bates, R. Sosnowski, V. G. Timofeev, Toralf Bernhard Skaali, T. Spassov, D. Gamba, G. Voulgaris, Sverker Johansson, I. Herbst, T.A. Fillipas, M. Voutilainen, G. Grosdidier, A. Samarin, M. Crozon, Juan Fuster, A. Ruiz, A. Pullia, A. N. Sissakian, Eleuterio Spiriti, W. Klempt, H. G. Fischer, T. Hofmokl, Marek Szczekowski, E. Tcherniaev, E. Rosso, H. Klein, J. P. Laugier, Peter M. Allen, M. Pimenta, B. A. Khomenko, N. De Groot, A. Stocchi, Francesco Navarria, M. Nonni, Borge Svane Nielsen, M. H. Gros, G. Cabras, Krzysztof Doroba, Jan Buytaert, D. Benedic, G. E. Theodosiou, 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 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, Abreu, P., Adam, W., Canale, Vincenzo, 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), 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), Aarnio, P, Abreu, P, Adam, W, Adami, F, Adrianos, P, Adye, T, Alekseev, G, Allaby, J, Allen, P, Allport, P, Almehed, S, Alvsvaag, S, Amaldi, U, Anassontzis, E, Antilogus, P, Apel, W, Asman, B, Astesan, F, Astor Ferreres, C, Augustin, J, Augustinus, A, Baillon, P, Barao, F, Barbiellini, G, Bardin, D, Barlag, S, Barlow, J, Baroncelli, A, Barranco-Luque, M, Barreira, G, Barring, O, Bartl, W, Bates, M, Baubillier, M, Becks, K, Beeston, C, Bell, W, Belokopytov, I, Beltran, P, Benedic, D, Benlloch, J, Berggren, M, Bertrand, D, Biagi, S, Bianchi, F, Bibby, J, Bilenky, M, Billoir, P, Bingefors, N, Bjarne, J, Bloch, D, Bogolubov, P, Bollini, D, Bolognese, T, Bonapart, M, Booth, P, Boratav, M, Borgeaud, P, Borisov, G, Borner, H, Bosio, C, Botner, O, Bouquet, B, Bozzo, M, Braibant, S, Branchini, P, Brand, C, Brand, K, Bricman, C, Brown, R, Brummer, N, Brunet, J, Bugge, L, Buran, T, Burmeister, H, Buttar, C, Buytaert, J, Cabras, G, Caccia, M, Cairanti, S, Calvi, M, Camacho Rozas, A, Campagne, J, Campion, A, Camporesi, T, Canale, V, Carroll, L, Caso, C, Castelli, E, Castillo Gimenez, V, Cattai, A, Cavallo, F, Cerrito, L, Chadwick, G, Charpentier, P, Checchia, P, Chelkov, G, Chevalier, L, Chiccoli, C, Chliapnikov, P, Chorowicz, V, Cirio, R, Clara, M, Contreras, J, Contri, R, Couchot, F, Crawley, H, Crennell, D, Cresti, M, Crosetti, G, Crosland, N, Crozon, M, Cuevas Maestro, J, Curwen, L, Dahl-Jensen, E, D'Almagne, B, Dam, M, Damgaard, G, Darbo, G, Daubie, E, Davenport, M, De Angelis, A, De Beer, M, De Clercq, C, De Groot, N, De La Vaissiere, C, Delikaris, D, Delpierre, P, Di Ciaccio, L, Diddens, A, Dijkstra, H, Dimitriou, N, Djama, F, Dolbeau, J, Doroba, K, Downs, R, Dracos, M, Drees, J, Dris, M, Du, S, Dulinski, W, Dzhelyadin, R, Edwards, D, Eek, L, Eerola, P, Ekelof, T, Ekspong, G, Ellila, M, Engel, J, Falaleev, V, Fenyuk, A, Fernandez Alonso, M, Ferrer, A, Ferroni, S, Fillipas, T, Firestone, A, Fischer, H, Flinn, M, Foeth, H, Fokitis, E, Folegati, P, Fontanelli, F, Forsbach, H, Fraissard, D, Franek, B, Fransson, K, Frenkiel, P, Fries, D, Frodesen, A, Fruhwirth, R, Fulda-Quenzer, F, Fuster, J, Gago, J, Gaillard, M, Galeazzi, G, Gamba, D, Gaspar, C, Gasparini, U, Gavillet, P, Gawne, S, Gazis, E, Genat, J, Gerber, J, Glitza, K, Gokieli, R, Golovatyuk, V, Gomes, P, Gomez Y Cadenas, J, Goobar, A, Gopal, G, Gorbics, M, Goret, B, Gorski, M, Goujon, G, Gracco, V, Grant, A, Grard, F, Graziani, E, Grillet, J, Gros, M, Grosdidier, G, Grossetete, B, Grung, B, Guglielmi, L, Gumenyuk, S, Guy, J, Hahn, F, Hahn, M, Haider, S, Haissinski, J, Hajduk, Z, Hakansson, A, Hallgren, A, Hamacher, K, Hamel De Monchenault, G, Harris, F, Heck, B, Herbst, I, Hernandez, J, Herquet, P, Herr, H, Higon, E, Hilke, H, Hofmann, H, Hofmokl, T, Holmgren, S, Hooper, J, Horisberger, R, Houlden, M, Hrisoho, A, Hrubec, J, Huitu, K, Hulth, P, Hultqvist, K, Husson, D, Hyams, B, Imbault, D, Innocente, M, Ioannou, P, Iversen, P, Jackson, J, Jalocha, P, Jarlskog, G, Jarry, P, Jean-Marie, B, Joensuu, J, Johansson, E, Johansson, H, Johansson, S, Jonker, M, Juillot, P, Kadyrov, R, Kalkanis, G, Kalmus, G, Kantardjian, G, Katsanevas, S, Katsoufis, E, Keranen, R, Kesteman, J, Khomenko, B, Khovanski, N, King, B, Kisielewski, B, Klein, H, Klempt, W, Klovning, A, Koene, B, Kokkinias, P, Kontaxis, I, Kopf, M, Koratzinos, M, Korcyl, K, Korzen, B, Kostarakis, P, Kourkoumelis, C, Kreuzberger, T, Krolikowski, J, Krstic, J, Kruener-Marquis, U, Kucewicz, W, Kuhn, G, Kurvinen, K, Laakso, M, Lambropoulos, C, Lanceri, L, Langerveld, D, Lapchine, V, Lapin, V, Laugier, J, Lauhakangas, R, Laurikainen, P, Lavigne, B, Le Grand, J, Lebbolo, H, Leder, G, Lemonne, J, Lenzen, G, Lepeltier, V, Letessier-Selvon, A, Lidbury, J, Lieb, E, Lillestol, E, Lillethun, E, Lippi, I, Llosa, R, Loerstad, B, Lokajicek, M, Loken, J, Lopez Aguera, M, Lorenz, P, Loukas, D, Lucock, R, Lund-Jensen, B, Lutz, P, Lyons, L, Maehlum, G, Maeland, O, Maillard, J, Maltezos, A, Maltezos, S, Mandl, F, Marco, J, Marin, J, Markou, A, Mas, J, Mathis, L, Matteuzzi, C, Matthiae, G, Mattsson, L, Mazzucato, M, Mc Cubbin, M, Mc Kay, R, Menichetti, E, Meroni, C, Meyer, W, Michalowski, J, Mitaroff, W, Mitselmakher, G, Mjoernmark, U, Moa, T, Moeller, R, Moenig, K, Monge, M, Morettini, P, Mueller, H, Muller, H, Mur, M, Muryn, B, Myatt, G, Navarria, F, Negri, P, Nielsen, B, Nigro, M, Nikolaenko, V, Nonni, M, Noppe, J, Nordberg, M, Nounos, S, Obraztsov, V, Odegaard, T, Orava, R, Ouraou, A, Pagot, J, Pain, R, Pakonski, K, Palka, H, Palma Lopes, S, Papadopoulou, T, Pape, L, Pasini, P, Passeneau, M, Passeri, A, Pattison, J, Pegoraro, M, Perevozchikov, V, Perez, J, Pernicka, M, Perrotta, A, Petrucci, G, Pettersen, T, Pimenta, M, Pingot, O, Pinori, C, Pinsent, A, Poiret, C, Pol, M, Polok, G, Poropat, P, Privitera, P, Pullia, A, Pyyhtia, J, Queru, P, Quinton, S, Rademakers, A, Radojicic, D, Ragazzi, S, Ragazzon, R, Range, W, Raoul, J, Ratoff, P, Read, A, Redaelli, N, Regler, M, Reid, D, Reis, M, Renton, P, Resvanis, L, Richard, F, Rinaudo, G, Romaya, A, Romero, A, Roncagliolo, I, Ronchese, P, Rongved, R, Rosenberg, E, Rossel, F, Rosso, E, Roudeau, P, Rovelli, T, Ruhlmann, V, Ruiz, A, Rybicki, K, Saarikko, H, Sacco, D, Sacquin, Y, Sadovsky, A, Salgado, C, Salt, J, Samarin, A, Sanchez, E, Sanchis, E, Sannino, M, Schaeffer, M, Schneider, H, Scuri, F, Sebastia, A, Sedykh, Y, Segar, A, Sekulin, R, Sessa, M, Sette, G, Seufert, R, Shellard, R, Siegrist, P, Simonetti, S, Simonetto, F, Sissakian, A, Skaali, T, Skeens, J, Skjevling, G, Smadja, G, Smith, G, Sosnowski, R, Spang, K, Spassov, T, Spentzouris, P, Spiriti, E, Squarcia, S, Staeck, H, Stanescu, C, Stavropoulos, G, Stichelbaut, F, Stocchi, A, Strauss, J, Strub, R, Sundell, E, Szczekowski, M, Szeptycka, M, Szymanski, P, Tavernier, S, Tcherniaev, E, Theodosiou, G, Tilquin, A, Timmermans, J, Timofeev, V, Tkachev, L, Toet, D, Topp-Jorgensen, S, Topphol, A, Tortora, L, Treille, D, Trevisan, U, Tristram, G, Troncon, C, Truong, T, Tsyganov, E, Turala, M, Turchetta, R, Turluer, M, Tuuva, T, Tyapkin, I, Tyndel, M, Udo, F, Ueberschaer, S, Ullaland, O, Uvarov, V, Valenti, G, Van Apeldoorn, G, Van Dam, P, Van Doninck, W, Van Eijk, B, Van Eijndhoven, N, Vander Velde, C, Vanuxem, J, Varela, J, Vaz, P, Vegni, G, Veitch, M, Vela, E, Velasco, J, Ventura, L, Venus, W, Vertogradov, L, Vilanova, D, Viseu Melo, L, Vlasov, E, Vodopianov, A, Vollmer, M, Voulgaris, G, Voutilainen, M, Vrba, V, Wahlen, H, Walck, C, Waldner, F, Wayne, M, Weilhammer, P, Werner, J, Wetherell, A, Wickens, J, Williams, W, Winter, M, Wormser, G, Woschnagg, K, Yamdagni, N, Yelton, J, Zaitsev, A, Zalewska, A, Zalewski, P, Zevgolatakos, E, Zhang, G, Zimin, N, Zito, M, Zitoun, R, Zukanovich Funchal, R, and Zumerle, G

Subjects
Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, Hadron, 01 natural sciences, Lower energy, Sphericity, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Minor (value), Multiplicity (chemistry), 010306 general physics, Particle Physics - Experiment, Boson
Abstract

Hadronic decays of Z 0 bosons are studied in the Delphi detector. Global event variables and singel particles inclusive distributions are compared with QCD-based predictions. The mean charged multiplicity is found to be 20.6±1.0 (stat+syst). The mean values of the sphericity, aplanarity, thrust, minor value, p in T and p out T are compared with values found at lower energy e + e − colliders.

Published
1990

3. Apparatus for two-body scattering experiments at 6 and 12 GeV/c with the CERN polarized deuteron target

Author

F. Langlois, J.C. Raoul, M. Fujisaki, J. Bystricky, A. Gaidot, A. de Lesquen, F. Lehar, G. Souchere, L. van Rossum, M. Babou, C. F. Hwang, Y. Ducros, G. Cozzika, T. Dobrowolski, A. Itano, and C. Bruneton

Subjects
Physics, Particle physics, Large Hadron Collider, Meson, Physics::Instrumentation and Detectors, Scattering, Hadron, General Medicine, Polarization (waves), Particle detector, Nuclear physics, Deuterium, High Energy Physics::Experiment, Nuclear Experiment, Nucleon
Abstract

An apparatus was built for an experiment with the CERN polarized deuteron target measuring the polarization in K + n ↑ → K ° p . The detectors and the available acquisition capacity were simultaneously used to take data on several other reactions.

Published
1979

4. Polarization measurement in pion-nucleon charge exchange π+n ↑ → π0p at 6GeV/c

Author

G. Cozzika, A. Itano, T. Dobrowolski, C. F. Hwang, A. Gaidot, F. Lehar, J.C. Raoul, M. Fujisaki, Y. Ducros, J. Bystricky, A. de Lesquen, L. van Rossum, G. Souchere, M. Babou, and F. Khantine-Langlois

Subjects
Nuclear physics, Recoil proton, Physics, Recoil, Pion, Nuclear Theory, High Energy Physics::Experiment, Neutron, Atomic physics, Nuclear Experiment, Polarization (waves), Nucleon, Charge exchange
Abstract

The polarization in pion-nucleon charge exchange was measured at 6 GeV/c incident momentum for 0.1 (GeV/c)2 < |t| < 1.6 (GeV/c)2. Using the channel π+ n ↑ → π0p allowed precise measurement of the recoil proton for good rejection of inelastic events. The results are compared with previous experiments using channel π−p ↑ with or without detection of the recoil neutron.

Published
1988

5. Measurement of the spin rotation parameter R in π−p and K−p elastic scattering at 40 GeV/c

Author

J. Pierrard, C. Bruneton, J. Bystricky, G. Cozzika, J. Deregel, A. Derevschikov, Y. Ducros, A. Gaidot, Yu.M. Kazarinov, M.Yu. Kazarinov, V.P. Kanavets, F. Khantine-Langlois, B. Khatchaturov, F. Lehar, A. De Lesquen, Yu. Matulenko, J.P. Merlo, A. Meschanin, S. Miyashita, J. Movchet, S.B. Nurushev, I. Potashnikova, J.C. Raoul, L. Van Rossum, A. Saraykin, V. Siksin, E. Smirnov, V. Solovyanov, and J. Strakhota

Subjects
Scattering amplitude, Physics, Elastic scattering, Nuclear and High Energy Physics, Scattering, Pi, Four-momentum, Atomic physics, Rotation, Spin-½
Abstract

The spin rotation parameter R has been measured for elastic π − p scattering at 40 GeV/ c , at four momentum transfers t ranging from −0.19 to −0.52 (GeV/ c ) 2 . The average value within this interval is R π − p = -0.200± 0.023. The resulting constraints on the πN scattering amplitudes are discussed. The experiments also yields an average value for K − p scattering, R K − p scattering, R K − p = -0.16±0.16.

Published
1975

6. Polarization measurements in π+p, K+p and pp elastic scattering at 45 GeV/c and comparison with Regge phenomenology

Author

A. P. Meschanin, Yu.M. Kazarinov, V. Solovyanov, A. Saraykin, Yu A. Matulenko, J. Deregel, J. Pierrard, A. A. Derevschikov, F. Khantine-Langlois, F. Lehar, J. Strakhota, B. Khatchaturov, V.P. Kanavets, E.V. Smirnov, J. Bystricky, A. Gaidot, J.C. Raoul, J. Movchet, J.P. Merlo, S.B. Nurushev, A. de Lesquen, L. van Rossum, Y. Ducros, G. Cozzika, S. Miyashita, I.K. Potashnikova, C. Bruneton, V.V. Siksin, and M.Yu. Kazarinov

Subjects
Physics, Nuclear physics, Elastic scattering, Nuclear and High Energy Physics, Pomeron, Angular distribution, Amplitude, Scattering, High Energy Physics::Experiment, Polarization (waves), Phenomenology (particle physics)
Abstract

The polarization parameter P has been measured for elastic π + p, K + p and pp scattering at 45 GeV/c. Four-momentum transfer ranges from −0.08 to −1.1 (GeV/) 2 for pp, and from −0.08 to −0.9 (GeV/) 2 for π + p and K + p. The energy dependence of the polarization P ( t ) in π + p and in K + p above 6 GeV/c incident momentum is compatible with interference between pomeron and Regge poles. On the other hand, the polarization in p p elastic scattering decreases faster than ordinary Regge model predictions. This result can be explained by interference between non flip and flip amplitudes of the pomeron, leading to negative values for the polarization.

Published
1976

7. Measurements of the spin rotation parameterR in high energy elastic scattering and helicity amplitudes at Serpukhov energies

Author

E.V. Smirnov, S.B. Nurushev, I.K. Potashnikova, J. Bystricky, F. Khantine-Langlois, J.C. Raoul, Yu A. Matulenko, B. Khatchaturov, Y. Ducros, G. Cozzika, C. Bruneton, A. P. Meschanin, V.V. Siksin, A. Saraykin, S. Miyashita, J. Deregel, A. de Lesquen, J.P. Merlo, J. Pierrard, A. A. Derevschikov, Yu.M. Kazarinov, V. Solovyanov, M.Yu. Kazarinov, J. Strakhota, V.P. Kanavets, F. Lehar, J. Movchet, L. van Rossum, and A. Gaidot

Subjects
Elastic scattering, Physics, Scattering, Nuclear Theory, General Physics and Astronomy, Rotation, Helicity, Nuclear physics, Scattering amplitude, Amplitude, Factorization, High Energy Physics::Experiment, Nuclear Experiment, Spin-½
Abstract

The spin rotation parameterR in pp and π+ p elastic scattering at 45 GeV/c has been measured at the Serpukhov accelerator, for ¦t¦ ranging from 0·2 to 0·5 (GeV/c)2. The results are presented, together with previousR measurements at lower energies, and are compared with the predictions of Regge pole models. The equality of the values forR in proton-proton and pion-proton scattering, within the experimental errors, is a test of factorization of the residues.

Published
1976

8. Large proportional chambers for muon detection in the CELLO experiment at petra

Author

F. Pierre, J.C. Raoul, A. Durand, A. Patoux, A. Gaidot, B. Rousse, J.C. Maillet, J. Bouchez, G. Souchere, J.P. Pansart, H. Martin, J. Pamela, G. Francinet, J. Heitzmann, R. Aleksan, Y. Ducros, and G. Cozzika

Subjects
Nuclear physics, Physics, Muon, law, Detector, General Engineering, Solid angle, Multiplexing, Cello, Cathode, law.invention, Muon detector
Abstract

We describe the muon detector in the CELLO experiment. This detector is composed of one layer of proportional chambers placed after a total of 5 interaction lengths of matter. These chambers have cathode read-out, thus enabling the unambiguous determination of coordinates. A total of 32 chambers has been built in order to cover 95% of the total solid angle. The read-out electronics use the FILAS integrated chips made by EFCIS. Data concentration is done by a multiplexing system which addresses only those chambers which have some information. The precision is poor, but sufficient for muon detection: σ = ±6 mm.

Published
1981

9. Polarization measurements in high energy elastic scattering of pions, kaons, protons and antiprotons on protons and comparison with regge phenomenology

Author

I.K. Potashnikova, A. Gaidot, J.C. Raoul, J. Deregel, F. Lehar, S. Miyashita, Y. Ducros, C. Bruneton, V. P. Kanavest, V.V. Siksin, J. Bystricky, G. Cozzika, L. van Rossum, J. Pierrard, F. Khantine-Langlois, J. Strakhota, A. P. Meschanin, Yu.M. Kazarinov, V. Solovyanov, A. Saraykin, E.V. Smirnov, Yu A. Matulenko, A. de Lesquen, B. Khatchaturov, S.B. Nurushev, A. A. Derevschikov, J. Movchet, J.P. Merlo, and M.Yu. Kazarinov

Subjects
Physics, Elastic scattering, Particle physics, Meson, Scattering, Hadron, General Physics and Astronomy, Elementary particle, Nuclear physics, Pomeron, Pion, Antiproton, High Energy Physics::Experiment, Nuclear Experiment
Abstract

The polarization parameterP has been measured for elastic scattering on polarized protons, of π−, K− and ¯p at 40 GeV/c and of π+, K+ and p at 45 GeV/c. Four-momentum transfer ranges from −0·08 to −1·8 (GeV/c)2 for π−p, and from −0·08 to about −1sd0(GeV/c)2 for p, π+, K± and ¯p. The angular distribution of the polarization in π−p exhibits the well known non sense double zero att=−0·6 (GeV/c)2. The K−p and ¯pp results are compatible with exchange degeneracy for ¦t¦r

Published
1976

10. Polarization measurements in π−p, K−p and p¯p elastic scattering at 40 GeV/c

Author

S.B. Nurushev, J.C. Raoul, Y. Ducross, J. Pierrard, B. Khatchaturov, I.K. Potashnikova, A. P. Meschanin, A. Saraykin, L. van Rossum, V.P. Kanavets, F. Khantine-Langlois, J. Deregel, S. Miyashita, A. de Lesquen, C. Bruneton, J. Movchet, A. Gaidot, Yu A. Matulenko, A. A. Derevschikov, M.Yu. Kazarinov, G. Cozzika, V.V. Siksin, J. Bystricky, Yu.M. Kazarinov, V. Solovyanov, F. Lehar, E.V. Smirnov, J. Strakhota, and J.P. Merlo

Subjects
Baryon, Nuclear physics, Physics, Elastic scattering, Nuclear and High Energy Physics, Pomeron, Scattering, Antiproton, Hadron, High Energy Physics::Experiment, Nucleon, Helicity
Abstract

We report final results on the polarization parameter P in elastic scattering of π − , K − and antiprotons at 40 GeV/ c incident momentum. The energy dependence of P (t) in π − p above 10 GeV/ c is well fitted by P (t) α s αR(t)-α P (t) where α R (t) are the effective Regge and Pomeron trajectories respectively. The data in K − p are compatible with exchange degeneracy. The results inp¯p show an important structure for |t|> 0.3 (GeV/c) 2 demonstrating the existence of a large helicity flip amplitude.

Published
1975

11. Elastic scattering of AT 39 AND 44.5 GeV/c

Author

E.V. Smirnov, L. van Rossum, S.B. Nurushev, J.P. Merlo, A. de Lesquen, J. Strachota, B. Khatchaturov, V.P. Kanavets, J. Movchet, J.C. Raoul, C. Bruneton, V.V. Siksin, A. Gaidot, Yu A. Matulenko, A. P. Meschanin, A. Saraykin, F. Khantine-Langlois, V. Solovyanov, J. Deregel, J. Bystricky, A. A. Derevschikov, F. Lehar, S. Miyashita, Y. Ducros, G. Cozzika, and M.Yu. Kazarinov

Subjects
Physics, Baryon, Elastic scattering, Nuclear and High Energy Physics, Antiparticle, Scattering, Antiproton, Hadron, Momentum transfer, Analytical chemistry, Nucleon
Abstract

The differential cross sections for elastic π − p, K − p , p p and π + p, pp scattering at 39 and 44.5 GeV/c, respectively, have been measured in the interval of momentum transfer squared 0.15 ≤ ovbt| ≤ 2 (GeV/c)2.

Published
1977

12. Polarization measurements in π+ p and K+ p elastic scattering at 6 and 12 GeV/c with the CERN polarized deuteron target

Author

L. van Rossum, C. F. Hwang, A. Itano, Y. Ducros, F. Lehar, A. Gaidot, A. de Lesquen, G. Cozzika, J. Bystricky, G. Souchere, T. Dobrowolski, M. Babou, F. Khantine-Langlois, M. Fujisaki, and J.C. Raoul

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, Proton, Scattering, media_common.quotation_subject, Nuclear Theory, Momentum transfer, Polarization (waves), Asymmetry, Nuclear physics, Deuterium, Neutron, Nuclear Experiment, media_common
Abstract

The polarization in π + p → π + p and K + p → K + p has been measured at 6 and 12 GeV/ c in the four-momentum transfer interval 0.1 ⩽ | t | ⩽ 2.0 (GeV/ c ) 2 by scattering on protons of a polarized deuteron target. Comparison with existing results obtained with polarized proton targets shows good general agreement and no evidence for asymmetry effects due to the presence of the spectator neutron. For K + p elastic scattering polarization the experiment yields improved statistics, especially at 6 GeV/ c

Published
1979

13. Apparatus for simultaneous measurements of the polarization and spin-rotation parameters in high-energy elastic scattering on polarized protons

Author

P. Roubeau, V.N. Zapolsky, V.P. Kanavets, J.C. Raoul, Yu.M. Kazarinov, V. Solovyanov, S.B. Nurushev, A. Katz, J. Pierrard, A. P. Meschanin, G. Souchere, A. Saraykin, C. Bruneton, B. Khatchaturov, E.V. Smirnov, J. Bystricky, V.V. Siksin, F. Khantine-Langlois, A. Gaidot, V.S. Seleznev, J. Deregel, P. Autones, Y. Ducros, N.I. Golovnya, G. Cozzika, A. A. Derevschikov, R. Auzolle, F. Lehar, M.Yu. Kazarinov, J.P. Merlo, Yu.S. Khoderev, A. de Lesquen, I.K. Potashnikova, S. Miyashita, L. van Rossum, Yu A. Matulenko, J. Movchet, and M. Ramadier

Subjects
Elastic scattering, Physics, High energy, Hydrogen, Detector, chemistry.chemical_element, General Medicine, Polarization (waves), Momentum, Nuclear physics, Data acquisition, chemistry, Scintillation counter, Atomic physics
Abstract

The main parts of an apparatus for simultaneous measurements of the polarization and spin-rotation parameters in high-energy elastic scattering on polarized protons are described, including the beam design, the polarized target, detectors, fast electronics, and the data acquisition. Measurements have been performed in 1972 to 1974 at the Serpukhov accelerator with π − , K − and p of 40 GeV/ c , and with p, π + and K + of 45 Ge V / c incident momentum. In addition to the results for P and R , the experiment also yields information on the unpolarized differential cross section.

Published
1975

14. The DELPHI time projection chamber

Author

Y. Sacquin, M. Gros, M. Crozon, D. Vilanova, B. Jean-Marie, J.M. Noppe, J.C. Raoul, G. Saget, G. Smadja, Göran Jarlskog, Philippe Charpentier, G. Cairanti, J. Mas, V. Ruhlmann, Andre Tilquin, A. Hrisoho, D. Delikaris, M. Turluer, K. Truong, P. Antilogus, M.P. Clara, C. Brand, M. Gaillard, F. Richard, M. DeBeer, B. Lorstadt, P. Siegrist, P A. Delpierre, T. Bolognese, F. Vernocchi, J.E. Augustin, P. Courty, Ulf Mjörnmark, P. Borgeaud, H. J. Hilke, O. Barring, G. Darbo, P. Billoir, P. Jarry, K. Sulkowski, M. Mur, B. W. Heck, C. Boutonnet, S. Kack, P. Vergezac, V. Lepeltier, J.P. Turlot, H. Foeth, A. Diaczek, and C. Aubert

Subjects
Physics, Nuclear and High Energy Physics, Wire chamber, Time projection chamber, Physics::Instrumentation and Detectors, business.industry, Detector, Electrical engineering, Cosmic ray, Tracking (particle physics), Particle detector, Nuclear Energy and Engineering, Nuclear electronics, Calibration, Electrical and Electronic Engineering, business
Abstract

The central tracking device of the DELPHI experiment is a time projection chamber (TPC) with an active volume of 2*1.34 m in length and 2.22 m in diameter. Since spring 1988 the TPC has undergone extensive tests in a cosmic ray setup. It has been equipped with its final readout electronics for one complete sector ( approximately 2000 channels) and has been operated since with cosmic rays as well as with the laser system and all the other calibration devices. First results indicate that the TPC behaves as expected, but more work and analysis is needed to quote final numbers. It will be installed in the LEP tunnel by early 1989. The authors describe the construction, the readout electronics, and the contribution of the TPC to the Delphi trigger. Emphasis is given to novel features which are not used in similar detectors. >

Published
1989

15. Measurements of polarization and spin rotation in proton-proton elastic scattering at 3.83 GeV/c

Author

F. Lehar, A. Gaidot, J. Bystricky, J.C. Raoul, Y. Ducros, J.P. Merlo, G. Cozzika, J. Deregel, J. Movchet, S. Miyashita, C. Bruneton, L. van Rossum, and A. de Lesquen

Subjects
Physics, Nuclear physics, Elastic scattering, Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Experiment, Nuclear Experiment, Polarization (waves)
Abstract

The polarization P in proton-proton elastic scattering has been measured at 3.83 GeV/c for 0.35 ⩽ |t| ⩽ 3.0 (GeV/c)2, i.e. 29° ⩽ θc.m. ⩽ 93°. The polarization shows a minimum at − ⋍ 1.0 ( GeV /c) 2 followed by a maximum at −⋍1.5 ( GeV /c) 2 . At the same energy the spin rotation parameter R has been measured in the interval 0.18 ⩽ |t| ⩽ 0.57 (GeV/c)2. Comparison with the results at 6.0 and 15.75 GeV/c shows a similar t-dependence and the same average value at all three energies.

Published
1976

16. The DELPHI time projection chamber

Author

C. Brand, S. Cairanti, P. Charpentier, D. Delikaris, P. Delpierre, H. Foeth, B.W. Heck, H.J. Hilke, A. Sancho, J. Wildman, C. Aubret, P. Billoir, C. Boutonnet, P. Courty, M. Crozon, A. Diaczek, J. Mas, L. Mathis, G. Saget, A. Tilquin, J.P. Turlot, P. Vergezac, P. Antilogus, J.E. Augustin, M. Gaillard, M.H. Gros, A. Hrisoho, B. Jean-Marie, V. Lepeltier, J.M. Noppe, F. Richard, K. Truong, T. Bolognese, P. Borgeaud, M. Debeer, G. Goujon, M. Gros, P. Jarry, M. Mur, J.C. Raoul, V. Ruhlmann, Y. Sacquin, P. Siegrist, G. Smadja, M. Turluer, D. Vilanova, G. Darbo, O. Bärring, G. Jarlskog, S. Käck, B. Lorstadt, and U. Mjörnmark

Subjects
Nuclear and High Energy Physics, Instrumentation
Published
1989

17. Apparatus for spin-rotation measurements in pion-proton scattering at high energies

Author

A. Katz, B. Tsai, J. C. Brisson, J.F. Mougel, J.P. Duthil, J.C. Raoul, J. Deregel, J.M. Rieubland, P. Autones, Y. Ducros, G. Cozzika, J.M. Fontaine, Michel J. Hansroul, B. Amblard, A. Boucherie, H. Desportes, J.P. Merlo, A. de Lesquen, L. van Rossum, and J. Movchet

Subjects
Physics, Proton, Physics::Instrumentation and Detectors, Scattering, Nuclear Theory, Polarimeter, General Medicine, Polarization (waves), Nuclear physics, Scattering amplitude, Recoil, Pion, Scintillation counter, Nuclear Experiment
Abstract

Measurements of spin-rotation parameters allow a complete determination of the pion-nucleon scattering amplitudes when the differential cross-section and the polarization normal to the scattering plane are known. This requires to scatter pions off a proton target that is polarized along a direction in the scattering plane, and to analyze the polarization of the recoil protons in a carbon plate polarimeter. Scintillation counter hodoscopes associated with fast logic allow the spark chambers of the polarimeter to be triggered mainly on elastic scatterings off the free protons in the target.

Published
1972

19. Measurements of the spin rotation parameter R in pp and π+p elastic scattering at 45 GeV/c

Author

C. Bruneton, Y. Ducros, A. P. Meschanin, V.V. Siksin, A. Saraykin, A. Gaidot, L. van Rossum, G. Cozzika, E.V. Smirnov, S. Miyashita, Yu A. Matulenko, F. Khantine-Langlois, S.B. Nurushev, J. Bystricky, A. A. Derevschikov, J. Movchet, F. Lehar, A. de Lesquen, Yu.M. Kazarinov, V. Solovyanov, J. Pierrard, I.K. Potashnikova, J. Strakhota, J.C. Raoul, J.P. Merlo, B. Khatchaturov, J. Deregel, V.P. Kanavets, and M.Yu. Kazarinov

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, Scattering, Nuclear Theory, Hadron, Nuclear physics, Scattering amplitude, Pomeron, Pion, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Spin-½
Abstract

The spin rotation sf R in pp and π + p elastic scattering at 45 GeV/c has been measured at the Seppukhov accelarator, for z . sfnc ; t |; ranging from 0.2 to 0.5 (GeV/) 2 . The results are presented, together with previous R measurements at lower energies. The equality of the values for R in proton-proton and pion-proton scattering, within the experimental errors, is a test of factorization of the residues in the pomeron exchange.

Published
1976

20. Polarization measurements in K+n charge exchange at 6 and 12 GeV/c

Author

J.C. Raoul, A. Gaidot, F. Lehar, Y. Ducros, G. Cozzika, A. de Lesquen, L. van Rossum, T. Dobrowolski, C. F. Hwang, J. Bystricky, G. Souchere, A. Itano, M. Babou, F. Khantine-Langlois, and M. Fujisaki

Subjects
Physics, Nuclear and High Energy Physics, Meson, Hadron, Elementary particle, Polarization (waves), Charged particle, Baryon, Nuclear physics, Pion, Pair production, Deuterium, Atomic physics, Nucleon, Boson
Abstract

The polarization in K+n↑ → K0p has been measured at 6 and 12 GeV/c in the interval 0.1 < |t| < 1.0 using a polarized deuteron target. The results are compared to predictions from SU(3), exchange degeneracy (EXD) and line reserval, and from various phenomenological models.

Published
1978

22. Results on space measurement accuracy from tests of a half-scale delphi tpc prototype

Author

P. Siegrist, J. Y. Rousseau, Ph. Charpentier, G. Smadja, P. Billoir, J.E. Augustin, D. Delikaris, J.M. Noppe, J. M. Brunet, J.C. Raoul, B. Bouquet, M. Mur, Y. Sacquin, A. Diaczek, K. Truong, A. Foeth, H. J. Hilke, P. Delpierre, A. Hrisoho, Franck Richard, P. Borgeaud, D. Vilanova, P. Courty, B. Heck, C. Brand, R. Cirio, J.P. Turlot, J. Kent, Laboratoire de l'Accélérateur Linéaire (LAL), and 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)

Subjects
Physics, Nuclear and High Energy Physics, Accuracy and precision, Wire chamber, Scale (ratio), Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, 01 natural sciences, Particle detector, Nuclear magnetic resonance, 0103 physical sciences, Measuring instrument, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Particle beam, Instrumentation, Image resolution, Row, Simulation
Abstract

Tests on a half scale prototype of the DELPHI TPC exposed to a particle beam in magnetic field have been performed, using an electronic chain with 15 MHz 8-bit FADCs. A new geometry with circular pad rows was used, giving new data on space resolution.

Published
1986

23. Mini-logique : logique rapide pour le traitement des informations en physique de haute énergie

Author

S. Brehin, J.C. Brisson, M. Lemoine, and J.C. Raoul

Subjects
Philosophy, [PHYS.HIST]Physics [physics]/Physics archives, logic circuits, laboratory apparatus and technique, Humanities, physics, spark chambers
Abstract

L'utilisation de circuits integres rapides pour la construction de logiques de declenchement de chambres a etincelles permet d'obtenir des temps de traitement des informations inferieurs a 100 ns avec des temps de resolution a l'entree de 6 ns. Le principe de la logique est detaille et deux exemples sont presentes.

Published
1969

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