Photon structure functions and azimuthal correlations of lepton pairs in tagged γγ collisions

M Acciarri,O Adriani,M Aguilarbenitez, S P Ahlen,J Alcaraz,G Alemanni,J Allaby, A Aloisio,M G Alviggi,G Ambrosi,H Anderhub,V Andreev,T Angelescu,F Anselmo, A Arefiev,T Azemoon,T Aziz, P Bagnaia,L Baksay,R C Ball,Sw Banerjee,K Banicz,A Barczyk,R Barillere, L Barone,P Bartalini,A Baschirotto,M Basile,R Battiston, A Bay, F Becattini,U Becker,F Behner,J Berdugo,P Berges,B Bertucci,B L Betev,Satyaki Bhattacharya,M Biasini,A Biland,G M Bilei,J J Blaising, S Blyth,G J Bobbink,R Bock,A Bohm, L Boldizsar,B Borgia,D Bourilkov,M Bourquin, D Boutigny,S Braccini,J G Branson,V Brigljevic, I Brock,A Buffini,A Buijs,J D Burger,W J Burger,J Busenitz,X D Cai,M Campanelli,M Capell,G Cara Romeo,G Carlino,A M Cartacci,J Casaus,G Castellini,F Cavallari,N Cavallo,C Cecchi,M Cerrada,F Cesaroni,M Chamizo,Y H Chang,U K Chaturvedi,S Chekanov,M Chemarin,A Chen,G M Chen,H F Chen,Minqin Chen, G Chiefari,C Y Chien, L Cifarelli,F Cindolo,C Civinini,I Clare, R Clare,G Coignet,A P Colijn,N Colino, S Costantini,F Cotorobai,B De La Cruz,A Csilling,T S Dai,R Dalessandro,R De Asmundis,A Degre, K Deiters,P Denes,F Denotaristefani,M Diemoz,D Van Dierendonck,F Di Lodovico, C Dionisi, M Dittmar,A Dominguez,A Doria,M T Dova,E Drago,D Duchesneau,P Duinker,I Duran,S Easo,H El Mamouni, A Engler, F J Eppling,F C Erne,J P Ernenwein,P Extermann,M Fabre,R Faccini,M A Falagan,S Falciano,A Favara, J Fay, O L Fedin,M Felcini,T Ferguson,F Ferroni,H Fesefeldt,E Fiandrini,J H Field,F Filthaut,P H Fisher,I Fisk,G Forconi,L Fredj, K Freudenreich,C Furetta,Yu Galaktionov,S N Ganguli, P Garciaabia, M Gataullin,S S Gau,S Gentile,J Gerald,N Gheordanescu,S Giagu, S Goldfarb,Joel Goldstein,Z F Gong,A Gougas,G Gratta,M W Gruenewald,R Van Gulik, V K Gupta, A Gurtu, L J Gutay,D Haas,B Hartmann,A Hasan,D Hatzifotiadou, T Hebbeker,Alain Herve, P Hidas, J Hirschfelder,W C Van Hoek, H Hofer,Hafeez R Hoorani,S R Hou,Guoqing Hu, I Iashvili,B N Jin,L W Jones,P De Jong,I Josamutuberria,A Kasser,R A Khan,D Kamrad,J S Kapustinsky,Y Karyotakis, M Kaur,M N Kienzlefocacci, D H Kim,Jin Ki Kim,S C Kim,W W Kinnison,A Kirkby,D Kirkby,J Kirkby,D Kiss,W Kittel,A Klimentov,A C Konig,Anna Katharina Kopp,I Korolko,V Koutsenko,R W Kraemer,W Krenz,A Kunin,P Lacentre,P Ladron De Guevara,G Landi,C Lapoint, K Lassilaperini,P Laurikainen,A Lavorato,M Lebeau, A Lebedev, P Lebrun,P Lecomte, P Lecoq,P Le Coultre,Hee Jung Lee,C Leggett,J M Le Goff,R Leiste,E Leonardi,P Levtchenko,C Li,C H Lin,W T Lin, F L Linde,L Lista, Z A Liu,W Lohmann,E Longo,Wei Lu,Y S Lu,K Lubelsmeyer, C Luci,D Luckey, L Luminari, W Lustermann, W G Ma,Manas Maity, G Majumder, L Malgeri,A Malinin,C Mana,D Mangeol, P Marchesini,G Marian,A Marin,J P Martin, F Marzano,G G G Massaro, K Mazumdar,S Mele,L Merola, M Meschini,W J Metzger,M Von Der Mey,Y Mi,D Migani,A Mihul,A J W Van Mil,H Milcent, G Mirabelli,J Mnich, P Molnar,B Monteleoni,R Moore, T Moulik,R Mount, F Muheim,A J M Muijs, S Nahn,M Napolitano, F Nessitedaldi, H B Newman,T Niessen,A Nippe, A Nisati,H Nowak,Y D Oh, G Organtini,R Ostonen,S Palit,C Palomares,D Pandoulas,S Paoletti,P Paolucci,H K Park,I H Park,G Pascale,G Passaleva, S Patricelli,T Paul,M Pauluzzi, C Paus, F Pauss,D Peach,Y J Pei, S Pensotti,D Perretgallix, B A Petersen, S Petrak, A Pevsner, D Piccolo, M Pieri,P A Piroue,E Pistolesi,V Plyaskin, M Pohl,V Pojidaev,H Postema,J Pothier,N Produit,D Prokofiev,J Quartieri,G Rahalcallot, N Raja,P G Rancoita,M Rattaggi,G Raven,P A Razis,Daming Ren, M Rescigno, S Reucroft,T Van Rhee,S Riemann,K Riles,O Rind,A Robohm,J Rodin,B P Roe,L Romero,S Rosierlees,Ph Rosselet,S Roth,J A Rubio,D Ruschmeier,H Rykaczewski,J Salicio,E Sanchez, M P Sanders,M E Sarakinos, G Sauvage,C Schafer,V A Schegelsky,S Schmidtkaerst,D Schmitz,M Schneegans,N Scholz,H Schopper,D J Schotanus,J Schwenke, G Schwering,C Sciacca,D Sciarrino,L Servoli,S Shevchenko,N Shivarov,V Shoutko,J Shukla,E Shumilov,A Shvorob, T Siedenburg,D Son,V Soulimov,B Smith,P Spillantini,M Steuer, D P Stickland,H Stone,B Stoyanov,A Straessner, K Sudhakar, G Sultanov,L Z Sun,G Susinno,H Suter,J D Swain,X W Tang, L Tauscher, Lloyd M Taylor,Samuel C C Ting, S C Tonwar, J Toth,C Tully,K L Tung,Y Uchida,J Ulbricht,E Valente, G Vesztergombi,I Vetlitsky,G Viertel,M Vivargent,S Vlachos,Helmut Vogel,H Vogt,I Vorobiev,A A Vorobyov,A Vorvolakos,M Wadhwa,W Wallraff,J C Wang, X L Wang,Z M Wang,A Weber,S X Wu,S Wynhoff, Jinyou Xu,Z Z Xu,B Z Yang,C G Yang,H J Yang, Mingta Yang,J B Ye,S C Yeh,J M You,An Zalite,Yu Zalite, P Zemp,Yu Zeng,Z P Zhang,Bing Zhou,Yihui Zhou,G Y Zhu,R Y Zhu, A Zichichi,F Ziegler, G Zilizi

PHYSICS LETTERS B（1998）

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摘要

The reactions e(+)e(-) --> e(+)e(-)e(+)e(-) and e(+)e(-) --> e(+)e(-)mu(+)mu(-), in a single tag configuration, are studied at LEP with the L3 detector. The data set corresponds to an integrated luminosity of 93.7 pb(-1) at root s = 91 GeV. Differential cross sections are measured for 1.4 GeV2 less than or equal to Q(2) less than or equal to 7.6 GeV2. The leptonic photon structure function F-2(gamma) and azimuthal correlations are measured for e(+)e(-) --> e(+)e(-)mu(+)mu(-). The related structure functions F-A(gamma) and F-B(gamma), which originate from interference terms of the scattering amplitudes, are determined for the first time. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

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