Skip to search
Skip to main content
Back to Search
Start Over
MEASUREMENT OF THE E+E- -] GAMMA-GAMMA(GAMMA) CROSS-SECTION AT LEP ENERGIES
Authors :
Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I Aleksan, Roy Alekseev, G D Allport, P P Almehed, S D'Almeida, F Alvsvaag, S J Amaldi, Ugo Andreazza, A Antilogus, P Apel, W D Apsimon, R J Arnoud, Y Åsman, B Augustin, J E Augustinus, A Baillon, Paul Bambade, P Barão, F Barate, R Barbiellini, Guido Bardin, Dimitri Yuri Barker, G J Baroncelli, A Bärring, O Barrio, J A Bartl, Walter Bates, M J Battaglia, Marco Baubillier, M Becks, K H Begalli, M Beillière, P Beltran, P Benvenuti, Alberto C Berggren, M Bertrand, D Bianchi, F Bigi, M Bilenky, S M Billoir, P Bjarne, J Bloch, D Blocki, J Blyth, S Bocci, V Bogolubov, P N Bolognese, T Bonesini, M Bonivento, W Booth, P S L Borisov, G Bosio, C Bostjancic, B Bosworth, S Botner, O Bouquet, B Bourdarios, C Bowcock, T J V Bozzo, M Braibant, S Branchini, P Brand, K D Brenner, R A Briand, H Bricman, C Brillault, L Brown, R C A Brunet, J M Bugge, L Buran, T Buys, A Buytaert, J Caccia, M Calvi, M Camacho-Rozas, A J Campion, R Camporesi, T Canale, V Cankocak, K Cao, F Carena, F Carrilho, P Carroll, L Cases, R Caso, Carlo Castillo-Gimenez, M V Cattai, A Cavallo, F R Cerrito, L Chabaud, V Chan, A Chapkin, M M Charpentier, P Chauveau, J Checchia, P Chelkov, G A Chevalier, L Chliapnikov, P V Chorowicz, V Chrin, J T M Cindro, V Collins, P Contreras, J L Contri, R Cortina, E Cosme, G Couchot, F Crawley, H B Crennell, D J Crosetti, G Cuevas-Maestro, J Czellar, S Dahl-Jensen, Erik Dahm, J D'Almagne, B Dam, M Damgaard, G Daubie, Evelyne Daum, A Dauncey, P D Davenport, Martyn Davies, J Da Silva, W Defoix, C Delpierre, P A Demaria, N De Angelis, A De Boeck, H de Boer, Wim De Brabandere, S De Clercq, C De Fez Laso, M D M La Vaissière, C de De Lotto, B De Min, A De Paula, L S Dijkstra, H Di Ciaccio, Lucia Djama, F Dolbeau, J Dönszelmann, M Doroba, K Dracos, M Drees, J Dris, M Dufour, Y Dupont, F Edsall, D M Eek, L O Ehret, R Ekelöf, T J C Ekspong, Gösta Elliot-Peisert, A Elsing, M Engel, J P Ershaidat, N Espirito-Santo, M C Falaleev, V P Fassouliotis, D Feindt, Michael Ferrer, A Filippas-Tassos, A Firestone, A Föth, H Fokitis, E Fontanelli, F Forbes, K A J Formenti, F Fousset, J L Francon, S Franek, B J Frenkiel, P Fries, D E C Frodesen, A G Frühwirth, R Fulda-Quenzer, F Fürstenau, H Fuster, J A Gamba, D Gandelman, M García, C García, J Gaspar, C Gasparini, U Gavillet, P Gazis, E N Gerber, J P Giacomelli, P Gillespie, D Gokieli, R Golob, B Golovatyuk, V M Gómez-Cadenas, J J Gopal, Gian P Gorn, L Górski, M Gracco, Valerio Grard, F Graziani, E Grosdidier, G Grossetête, B Gunnarsson, P Guy, J Haedinger, U Hahn, F Hahn, M Hahn, S Haider, S Hajduk, Z Hakansson, A Hallgren, A Hamacher, K Hamel de Monchenault, G Hao, W Harris, F J Hedberg, V Henriques, R P Hernández, J J Hernando, J A Herquet, P Herr, H Hessing, T L Higgins, C O Higón, E Hilke, Hans Jürgen Hill, T S Hodgson, S D Holmgren, S O Holt, P J Holthuizen, D J Honoré, P F Houlden, M A Hrubec, Josef Huet, K Hultqvist, K Ioannou, P Iversen, P S Jackson, J N Jacobsson, R Jalocha, P Jarlskog, G Jarry, P Jean-Marie, B Johansson, E K Jonker, M Jönsson, L B Juillot, P Kaiser, M Kalmus, George Ernest Kapusta, F Karlsson, M Karvelas, E Katargin, A Katsanevas, S Katsoufis, E C Keränen, R Khomenko, B A Khovanskii, N N King, B J Kjaer, N J Klein, H Klovning, A Kluit, P M Koch-Mehrin, A Köhne, J H Köne, B Kokkinias, P Koratzinos, M Korcyl, K Korytov, A V Kostyukhin, V Kourkoumelis, C Kuznetsov, O Kramer, P H Krammer, Manfred Kreuter, C Królikowski, J Kronkvist, I J Krupinski, W Kulka, K Kurvinen, K L Lacasta, C Lambropoulos, C Lamsa, J Lanceri, L Langefeld, P Lapin, V Last, I Laugier, J P Lauhakangas, R Leder, Gerhard Ledroit, F Leitner, R Lemoigne, Y Lemonne, J Lenzen, Georg Lepeltier, V Lesiak, T Lévy, J M Lieb, E H Liko, D Lindner, R Lipniacka, A Lippi, I Lörstad, B Lokajícek, M Loken, J G López-Fernandez, A López-Aguera, M A Los, M E Loukas, D Lozano-Bahilo, J Lutz, P Lyons, L Maehlum, G Maillard, J Maio, A Maltezos, A Mandl, F Marco, J Maréchal, B Margoni, M Marin, J C Mariotti, C Markou, A Maron, T Martí, S Martínez-Rivero, C Martínez-Vidal, F Matorras, F Matteuzzi, C Matthiae, Giorgio Mazzucato, M McCubbin, M L McKay, R McNulty, R Medbo, J Meroni, C Meyer, W T Michelotto, M Migliore, E Mikulec, I Mirabito, L Mitselmakher, G Mjörnmark, U Moa, T Møller, R Mönig, K Monge, M R Morettini, P Müller, H Murray, W J Muryn, B Myatt, Gerald Naraghi, F Navarria, Francesco Luigi Negri, P Némécek, S Neumann, W Neumeister, N Nicolaidou, R Nielsen, B S Nilsen, P E S Niss, P Nomerotski, A Obraztsov, V F Olshevskii, A G Orava, Risto Ostankov, A P Österberg, K Ouraou, A Paganini, P Paganoni, M Pain, R Palka, H Papadopoulou, T D Pape, L Parodi, F Passeri, A Pegoraro, M Pennanen, J Peralta, L Pernegger, H Pernicka, Manfred Perrotta, A Petridou, C Petrolini, A Piana, G Pierre, F Pimenta, M Plaszczynski, S Podobrin, O Pol, M E Polok, G Poropat, P Pozdnyakov, V Prest, M Privitera, P Pullia, Antonio Radojicic, D Ragazzi, S Rahmani, H Rames, J Ratoff, P N Read, A L Reale, M Rebecchi, P Redaelli, N G Regler, Meinhard Reid, D Renton, P B Resvanis, L K Richard, F Richardson, J Rídky, J Rinaudo, G Romero, A Roncagliolo, I Ronchese, P Ronjin, V M Rosenberg, E I Rosso, E Roudeau, Patrick Rovelli, T Rückstuhl, W Ruhlmann-Kleider, V Ruiz, A Rybicki, K Saarikko, H Sacquin, Yu Sajot, G Salt, J Sánchez, J Sannino, M Schael, S Schneider, H Schyns, M A E Sciolla, G Scuri, F Segar, A M Seitz, A Sekulin, R L Sessa, M I Seufert, R Shellard, R C Siccama, I Siegrist, P Simonetti, S Simonetto, F Sissakian, A N Skjevling, G Smadja, G Smirnov, N Smirnova, O G Smith, G R Sosnowski, R Souza-Santos, D Spassoff, Tz Spiriti, E Squarcia, S Stäck, H Stanescu, C Stapnes, Steinar Stavropoulos, G D Stepaniak, K Stichelbaut, F Stocchi, A Strauss, J Straver, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Szymanski, P Tabarelli de Fatis, T Chikilev, O G Theodosiou, G E Thomé, Z D Tilquin, A Timmermans, J Timofeev, V G Tkatchev, L G Todorov, T Toet, D Z Tomaradze, A G Tomé, B Torassa, E Tortora, L Treille, D Trischuk, W Tristram, G Troncon, C Tsirou, A L Tsyganov, E N Turala, Michal Turluer, M L Tuuva, T Tyapkin, I A Tyndel, M Tzamarias, S Überschär, B Überschär, S Ullaland, O Uvarov, V Valenti, G Vallazza, E Valls Ferrer, J A Van der Velde, C van Apeldoorn, G W van Dam, P Van der Heijden, M Van Doninck, W K Van Eldik, J Vaz, P Vegni, G Ventura, L Venus, W A 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, Peter Wetherell, Alan M Wickens, J H Wielers, M Wilkinson, G R Williams, W S C Winter, M Witek, M Wormser, G Woschnagg, K Zaitsev, A Zalewska-Bak, A Zavrtanik, D Zevgolatakos, E Zimin, N I Zito, M Zontar, D Zuberi, R Zumerle, G
Publication Year :
1994
Publisher :
ELSEVIER SCIENCE BV, 1994.
Abstract
The total and the differential cross sections for the reaction e+e- → γγ(γ) 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 Λ+ > 143 GeV and Λ- > 120 GeV, and the lower bound on the mass of an excited electron with an effective coupling constant λγ = 1 is 132 GeV/c2. Upper limits on the branching ratios for the decays Z0 → γγ, Z0 → π0γ, Z0 → ηγ and Z0 → γγγ have been determined to be 5.5 × 10-5, 5.5 × 10-5, 8.0 × 10-5, and 1.7 × 10-5 respectively. All the limits are at the 95% confidence level.
Details
Language :
English
Database :
OpenAIRE
Accession number :
edsair.dedup.wf.001..6845b1a7b21dc129795015fc935b5a35