A measurement of the photon structure functionF 2 γ at an averageQ 2 of 12 GeV2/c 4
P. Abreu,W. Adam, T. Adye,E. Agasi,I. Ajinenko,R. Aleksan, G. D. Alekseev,P. P. Allport,S. Almehed,S. J. Alvsvaag, U. Amaldi,S. Amato,A. Andreazza,M. L. Andrieux,P. Antilogus,W -D. Apel,Y. Arnoud, B. Åsman,J -E. Augustin, A. Augustinus, P. Baillon, P. Bambade, F. Barao,R. Barate,D. Y. Bardin,G. J. Barker, A. Baroncelli,O. Barring,J. A. Barrio,W. Bartl,M. J. Bates,M. Battaglia,B. Batyunya,M. Baubillier,J. Baudot, K. -H. Becks,M. Begalli,P. Beilliere,Yu Belokopytov, K. Belous, A. C. Benvenuti,M. Berggren,D. Bertrand,F. Bianchi,M. Bigi,M. S. Bilenky,P. Billoir,D. Bloch,M. Blume,S. Blyth,V. Bocci,T. Bolognese,M. Bonesini,W. Bonivento,P. S. L. Booth, G. Borisov,C. Bosio,S. Bosworth,O. Botner,B. Bouquet, C. Bourdarios,T. J. V. Bowcock,M. Bozzo,P. Branchini,K. D. Brand,T. Brenke, R. A. Brenner,C. Bricman,L. Brillault,R. C. A. Brown,P. Bruckman, J. -M. Brunet, L. Bugge, T. Buran,T. Burgsmueller,P. Buschmann,A. Buys,M. Caccia, M. Calvi,A. J. Camacho Rozas, T. Camporesi, V. Canale,M. Canepa, K. Cankocak,F. Cao,F. Carena,P. Carrilho, L. Carroll,C. Caso,M. V. Castillo Gimenez, A. Cattai, F. R. Cavallo, L. Cerrito,V. Chabaud,Ph Charpentier,L. Chaussard,J. Chauveau,P. Checchia, G. A. Chelkov, R. Chierici,P. Chliapnikov, P. Chochula,V. Chorowicz, V. Cindro,P. Collins,J. L. Contreras,R. Contri,E. Cortina,G. Cosme, F. Cossutti,H. B. Crawley,D. Crennell, G. Crosetti,J. Cuevas Maestro,S. Czellar, E. Dahl-Jensen,J. Dahm,B. Dalmagne,M. Dam,G. Damgaard,A. Daum, P. D. Dauncey,M. Davenport,W. Da Silva,C. Defoix,G. Della Ricca, P. Delpierre, N. Demaria,A. De Angelis,H. De Boeck,W. De Boer,S. De Brabandere,C. De Clercq,C. De La Vaissiere,B. De Lotto,A. De Min,L. De Paula,C. De Saint-Jean,H. Dijkstra,L. Di Ciaccio, F. Djama,J. Dolbeau,M. Donszelmann, K. Doroba,M. Dracos, J. Drees,K. -A. Drees, M. Dris,Y. Dufour,F. Dupont,D. Edsall,R. Ehret,G. Eigen,T. Ekelof,G. Ekspong, M. Elsing, J -P. Engel,N. Ershaidat,B. Erzen,M. Espirito Santo,E. Falk, D. Fassouliotis, M. Feindt,A. Fenyuk, A. Ferrer,T. A. Filippas,A. Firestone,H. Foeth,E. Fokitis, F. Fontanelli,F. Formenti,B. Franek,P. Frenkiel,D. C. Fries,A. G. Frodesen, R. Fruhwirth,F. Fulda-Quenzer,H. Furstenau,J. Fuster,A. Galloni,D. Gamba,M. Gandelman,C. Garcia,J. Garcia,C. Gaspar, U. Gasparini,Ph Gavillet, E. N. Gazis, D. Gele,J -P. Gerber,M. Gibbs,D. Gillespie, R. Gokieli,B. Golob,G. Gopal,L. Gorn,M. Gorski,Y. Gouz,V. Gracco, E. Graziani,G. Grosdidier,P. Gunnarsson,M. Gunther,J. Guy,U. Haedinger, F. Hahn,M. Hahn,S. Hahn, Z. Hajduk, A. Hallgren,K. Hamacher,W. Hao,F. J. Harris, V. Hedberg,J. J. Hernandez,P. Herquet,H. Herr,T. L. Hessing,E. Higon,H. J. Hilke,T. S. Hill, S -O. Holmgren,P. J. Holt,D. Holthuizen, M. Houlden, J. Hrubec,K. Huet, K. Hultqvist, P. Ioannou, J. N. Jackson,R. Jacobsson,P. Jalocha,R. Janik, G. Jarlskog, P. Jarry,B. Jean-Marie,E. K. Johansson,L. Jonsson,P. Jonsson, C. Joram, P. Juillot,M. Kaiser,G. Kalmus, F. Kapusta,M. Karlsson, E. Karvelas,S. Katsanevas,E. C. Katsoufis,R. Keranen,B. A. Khomenko,N. N. Khovanski,B. King,N. J. Kjaer,H. Klein,A. Klovning, P. Kluit,J. H. Koehne,B. Koene,P. Kokkinias,M. Koratzinos, K. Korcyl,V. Kostioukhine, C. Kourkoumelis,O. Kouznetsov,P. -H. Kramer,M. Krammer,C. Kreuter,J. Krolikowski,I. Kronkvist,Z. Krumstein,W. Krupinski,P. Kubinec,W. Kucewicz,K. Kurvinen, C. Lacasta,I. Laktineh,S. Lamblot,J. W. Lamsa,L. Lanceri,D. W. Lane,P. Langefeld,V. Lapin,I. Last,J -P. Laugier,R. Lauhakangas,G. Leder,F. Ledroit,V. Lefebure,C. K. Legan, R. Leitner,Y. Lemoigne,J. Lemonne, G. Lenzen,V. Lepeltier,T. Lesiak, D. Liko,R. Lindner, A. Lipniacka,I. Lippi,B. Loerstad, M. Lokajicek,J. G. Loken,J. M. Lopez,A. Lopez-Fernandez,M. A. Lopez Aguera, D. Loukas,P. Lutz, L. Lyons,J. MacNaughton,G. Maehlum, A. Maio,V. Malychev,F. Mandl,J. Marco,B. Marechal, M. Margoni,J -C. Marin, C. Mariotti, A. Markou,T. Maron,C. Martinez-Rivero,F. Martinez-Vidal,S. Marti i Garcia, F. Matorras, C. Matteuzzi,G. Matthiae, M. Mazzucato,M. Mc Cubbin,R. Mc Kay,R. Mc Nulty,J. Medbo, C. Meroni,W. T. Meyer,A. Miagkov,M. Michelotto, E. Migliore, L. Mirabito,U. Mjoernmark, T. Moa,R. Moeller,K. Moenig,M. R. Monge, P. Morettini,H. Mueller,L. M. Mundim, W. J. Murray,B. Muryn,G. Myatt,F. Naraghi, F. L. Navarria,S. Navas,P. Negri, S. Nemecek,W. Neumann, N. Neumeister, R. Nicolaidou,B. S. Nielsen,M. Nieuwenhuizen, V. Nikolaenko,P. Niss,A. Nomerotski,A. Normand,W. Oberschulte-Beckmann,V. Obraztsov,A. G. Olshevski,A. Onofre, R. Orava,K. Osterberg, A. Ouraou, P. Paganini, M. Paganoni,P. Pages,H. Palka,Th D. Papadopoulou, L. Pape,C. Parkes,F. Parodi, A. Passeri, M. Pegoraro,L. Peralta, H. Pernegger, M. Pernicka, A. Perrotta, C. Petridou, A. Petrolini,H. T. Phillips,G. Piana,F. Pierre,M. Pimenta,S. Plaszczynski,O. Podobrin, M. E. Pol,G. Polok,P. Poropat,V. Pozdniakov,M. Prest,P. Privitera,N. Pukhaeva, A. Pullia, D. Radojicic, S. Ragazzi,H. Rahmani,J. Rames,P. N. Ratoff, A. L. Read,M. Reale,P. Rebecchi,N. G. Redaelli,M. Regler,D. Reid,P. B. Renton,L. K. Resvanis,F. Richard,J. Richardson,J. Ridky,G. Rinaudo,I. Ripp,A. Romero,I. Roncagliolo, P. Ronchese, L. Roos,E. I. Rosenberg,E. Rosso,P. Roudeau, T. Rovelli,W. Ruckstuhl,V. Ruhlmann-Kleider,A. Ruiz, K. Rybicki,H. Saarikko,Y. Sacquin,A. Sadovsky, G. Sajot, J. Salt,J. Sanchez, M. Sannino,H. Schneider,M. A. E. Schyns, G. Sciolla, F. Scuri,Y. Sedykh,A. M. Segar,A. Seitz,R. Sekulin,R. C. Shellard,I. Siccama, P. Siegrist,S. Simonetti, F. Simonetto,A. N. Sisakian,B. Sitar,T. B. Skaali,G. Smadja, N. Smirnov,O. Smirnova,G. R. Smith,R. Sosnowski,D. Souza-Santos,T. Spassov, E. Spiriti,P. Sponholz,S. Squarcia, C. Stanescu, S. Stapnes,I. Stavitski,K. Stepaniak,F. Stichelbaut, A. Stocchi, J. Strauss, R. Strub, B. Stugu,M. Szczekowski,M. Szeptycka,T. Tabarelli,J. P. Tavernet,O. Tchikilev,A. Tilquin,J. Timmermans,L. G. Tkatchev, T. Todorov,D. Z. Toet, A. Tomaradze, B. Tome,L. Tortora,G. Transtromer, D. Treille, W. Trischuk,G. Tristram,A. Trombini, C. Troncon, A. Tsirou,M -L. Turluer,I. A. Tyapkin, M. Tyndel,S. Tzamarias,B. Ueberschaer,O. Ullaland, V. Uvarov, G. Valenti,E. Vallazza,C. Vander Velde,G. W. Van Apeldoorn,P. Van Dam,W. K. Van Doninck,J. Van Eldik,N. Vassilopoulos, G. Vegni,L. Ventura,W. Venus,F. Verbeure,M. Verlato,L. S. Vertogradov, D. Vilanova,P. Vincent,L. Vitale, E. Vlasov,A. S. Vodopyanov, V. Vrba, H. Wahlen,C. Walck,F. Waldner,M. Weierstall,P. Weilhammer, A. M. Wetherell, D. Wicke,J. H. Wickens, M. Wielers,G. R. Wilkinson,W. S. C. Williams,M. Winter,M. Witek,K. Woschnagg,K. Yip,O. Yushchenko,F. Zach,C. Zacharatou,A. Zalewska,P. Zalewski, D. Zavrtanik,E. Zevgolatakos,N. I. Zimin,M. Zito,D. Zontar,R. Zuberi,G. C. Zucchelli, G. Zumerle,DELPHI Collaboration
European Physical Journal C（2014）
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摘要
Abstract The hadronic photon structure functionF 2 γ has been measured in theQ 2 range from 4 to 30 GeV2/c 4 and down tox values of order 0.001, using data taken with the DELPHI detector at LEP between 1991 and 1993. A comparison is made with severalF 2 γ parameterizations with special emphasis on their lowx behaviour. A result on theQ 2 evolution ofF 2 γ is presented.
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关键词
Transverse Momentum, Invariant Mass, Pair Production, Light Quark, Invariant Mass Distribution
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