Determination of the e(+)e(-)->gamma gamma(gamma) cross-section at centre-of-mass energies ranging from 189 GeV to 202 GeV

Authors
Abreu, P Adam, W Adye, T Adzic, P Albrecht, Z Alderweireld, T Alekseev, GD Alemany, R Allmendinger, T Allport, PP Almehed, S Amaldi, U Amapane, N Amato, S Anassontzis, EG Andersson, P Andreazza, A Andringa, S Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P Ballestrero, A Bambade, P Barao, F Barbiellini, G Barbier, R Bardin, DY Barker, G Baroncelli, A Battaglia, M Baubillier, M Becks, KH Begalli, M Behrmann, A Beilliere, P Belokopytov, Y Belous, K Benekos, NC Benvenuti, AC Berat, C Berggren, M Berntzon, L Bertrand, D Besancon, M Bilenky, MS Bizouard, MA Bloch, D Blom, HM Bonesini, M Boonekamp, M Booth, PSL Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV Boyko, I Bozovic, I Bozzo, M Bracko, M Branchini, P Brenner, RA Bruckman, P Brunet, JM Bugge, L Buran, T Buschbeck, B Buschmann, P Cabrera, S Caccia, M Calvi, M Camporesi, T Canale, V Carena, F Carroll, L Gimenez, MVC Cattai, A Cavallo, FR Chapkin, M Charpentier, P Checchia, P Chelkov, GA Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Cieslik, K Collins, P Contri, R Cortina, E Cosme, G Cossutti, F Costa, M Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S D'Hondt, J Dalmau, J Davenport, M Da Silva, W Della Ricca, G Delpierre, P Demaria, N De Angelis, A De Boer, W De Clercq, C De Lotto, B De Min, A De Paula, L Dijkstra, H Di Ciaccio, L Dolbeau, J Doroba, K Dracos, M Drees, J Dris, M Eigen, G Ekelof, T Ellert, M Elsing, M Engel, JP Santo, ME Fanourakis, G Fassouliotis, D Feindt, M Fernandez, J Ferrer, A Ferrer-Ribas, E Ferro, F Firestone, A Flagmeyer, U Foeth, H Fokitis, E Fontanelli, F Franek, B Frodesen, AG Fruhwirth, R Fulda-Quenzer, F Fuster, J Galloni, A Gamba, D Gamblin, S Gandelman, M Garcia, C Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, EN Gele, D Geralis, T Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B Gomez-Ceballos, G Goncalves, P Caballero, IG Gopal, G Gorn, L Gouz, Y Gracco, V Grahl, J Graziani, E Gris, P Grosdidier, G Grzelak, K Guy, J Haag, C Hahn, F Hahn, S Haider, S Hajduk, Z Hallgren, A Hamacher, K Hansen, J Harris, FJ Hauler, F Hedberg, V Heising, S Hernandez, JJ Herquet, P Herr, H Higon, E Holmgren, SO Holt, PJ Hoorelbeke, S Houlden, M Hrubec, J Huber, M Hughes, GJ Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P Jean-Marie, B Jeans, D Johansson, EK Jonsson, P Joram, C Juillot, P Jungermann, L Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, EC Keranen, R Kernel, G Kersevan, BP Khokhlov, Y Khomenko, BA Khovanski, NN Kiiskinen, A King, B Kinvig, A Kjaer, NJ Klapp, O Kluit, P Kokkinias, P Kostioukhine, V Kourkoumelis, C Kouznetsov, O Krammer, M Kriznic, E Krumstein, Z Kubinec, P Kucewicz, W Kurowska, J Kurvinen, K Lamsa, JW Lane, DW Lapin, V Laugier, JP Lauhakangas, R Leder, G Ledroit, F Leinonen, L Leisos, A Leitner, R Lemonne, J Lenzen, G Lepeltier, V Lethuillier, M Libby, J Liebig, W Liko, D Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopes, JH Lopez, JM Lopez-Fernandez, R Loukas, D Lutz, P Lyons, L MacNaughton, J Mahon, JR Maio, A Malek, A Maltezos, S Malychev, V Mandl, F Marco, J Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Martinez-Rivero, C Garcia, SM Masik, J Mastroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, G Mazzucato, F Mazzucato, M Mc Cubbin, M Mc Kay, R Mc Nulty, R Mc Pherson, G Merle, E Meroni, C Meyer, WT Miagkov, A Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moch, M Moeller, R Moenig, K Monge, MR Moraes, D Morettini, P Morton, G Mueller, U Muenich, K Mulders, M Mulet-Marquis, C Mundim, LM Muresan, R Murray, WJ Muryn, B Myatt, G Myklebust, T Naraghi, F Nassiakou, M Navarria, FL Nawrocki, K Negri, P Neufeld, N Nicolaidou, R Nielsen, BS Niezurawski, P Nikolenko, M Nomokonov, V Nygren, A Mucha, AO Obraztsov, V Olshevski, AG Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A Oyanguren, A Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J Papadopoulou, TD Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A Passon, O Pavel, T Pegoraro, M Peralta, L Pernicka, M Perrotta, A Petridou, C Petrolini, A Phillips, HT Pierre, F Pimenta, M Piotto, E Podobnik, T Poireau, V Pol, ME Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H Rames, J Ratoff, PN Read, AL Rebecchi, P Redaelli, NG Regler, M Rehn, J Reid, D Reinertsen, P Reinhardt, R Renton, PB Resvanis, LK Richard, F Ridky, J Rinaudo, G Ripp-Baudot, I Romero, A Ronchese, P Rosenberg, EI Rosinsky, P Roudeau, P Rovelli, T Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Y Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M Savoy-Navarro, A Schwemling, P Schwering, B Schwickerath, U Scuri, F Seager, P Sedykh, Y Segar, AM Seibert, N Sekulin, R Sette, G Shellard, RC Siebel, M Simard, L Simonetto, F Sisakian, AN Smadja, G Smirnova, O Smith, GR Solovianov, O Sopczak, A Sosnowski, R Spassov, T Spiriti, E Squarcia, S Stanescu, C Stanitzki, M Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Taffard, A Tegenfeldt, F Terranova, F Timmermans, J Tinti, N Tkatchev, LG Tobin, M Todorova, S Tome, B Tonazzo, A Tortora, L Tortosa, P Transtromer, G Treille, D Tristram, G Trochimczuk, M Troncon, C Turluer, ML Tyapkin, IA Tyapkin, P Tzamarias, S Ullaland, O Uvarov, V Valenti, G Vallazza, E Van Dam, P Van den Boeck, W Van Eldik, J Van Lysebetten, A van Remortel, N Van Vulpen, I Vegni, G Ventura, L Venus, W Verbeure, F Verdier, P Verlato, M Vertogradov, LS Verzi, V Vilanova, D Vitale, L Vlasov, E Vodopyanov, AS Voulgaris, G Vrba, V Wahlen, H Washbrook, AJ Weiser, C Wicke, D Wickens, JH Wilkinson, GR Winter, M Wolf, G Yi, J Yushchenko, O Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI Zintchenko, A Zoller, P Zumerle, G Zupan, M
Citation
P. Abreu et al., Determination of the e(+)e(-)->gamma gamma(gamma) cross-section at centre-of-mass energies ranging from 189 GeV to 202 GeV, PHYS LETT B, 491(1-2), 2000, pp. 67-80
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
0370-2693 → ACNP
Volume
491
Issue
1-2
Year of publication
2000
Pages
67 - 80
Database
ISI
SICI code
0370-2693(20001012)491:1-2<67:DOTEGC>2.0.ZU;2-O
Abstract
A test of the QED process e(+)e(-) --> gamma gamma>(*) over bar *(gamma) is reported. The data analysed were collected with the DELPHI detector in 199 8 and 1999 at the highest energies achieved at LEP, reaching 202 GeV in the centre-of-mass. The total integrated luminosity amounts to 375.7 pb(-1). T he differential and total cross-sections for the process e(+)e(-) --> gamma gamma were measured, and found to be in agreement with the QED prediction. 95% confidence level (C.L.) lower limits on the QED cut-off parameters of Lambda (+) > 330 GeV and Lambda_ > 320 GeV were derived. A 95% C.L. lower b ound on the mass of an excited electron of 311 GeV/c(2) (for lambda gamma = 1) was obtained, s-channel virtual graviton exchange was searched for, res ulting in 95% C.L. lower limits on the string mass scale, M-S: M-S > 713 Ge V/c(2) (lambda = 1) and M-S > 691 GeV/c(2) (lambda = -1). (C) 2000 Publishe d by Elsevier Science B.V.