Cross Section And Heavy Quark Composition Of Gamma+Mu Events Produced In P(P)Over-Bar Collisions

T. Affolder, H. Akimoto, A. Akopian, M. G. Albrow, P. Amaral, D. Amidei, K. Anikeev, J. Antos, G. Apollinari,T. Arisawa,T. Asakawa,W. Ashmanskas, F. Azfar,P. Azzi-Bacchetta, N. Bacchetta,M. Bailey,S. Bailey,P. de Barbaro, A. Barbaro-Galtieri,V. Barnes, B. Barnett,S. Baroiant,M. Barone, G. Bauer,F. Bedeschi, S. Belforte,W. Bell, G. Bellettini, J. Bellinger, D. Benjamin,J. Bensinger, A. Beretvas,J. Berge, J. Berryhill,B. Bevensee, A. Bhatti,M. Binkley, D. Bisello,M. Bishai,R. Blair,C. Blocker,K. Bloom, B. Blumenfeld,S. Blusk, A. Bocci,A. Bodek,W. Bokhari, G. Bolla,Y. Bonushkin, D. Bortoletto, J. Boudreau,A. Brandl,S. Brink,C. Bromberg,M. Brozovic,N. Bruner,E. Buckley-Geer, J. Budagov,H. Budd, K. Burkett,G. Busetto,A. Byon-Wagner,K. Byrum,P. Calafiura,M. Campbell,W. Carithers,J. Carlson, D. Carlsmith,W. Caskey,J. Cassada, A. Castro, D. Cauz, A. Cerri,A. Chan,P. Chang,J. Chapman, C. Chen,Y. Chen,M. Cheng, M. Chertok,G. Chiarelli,I. Chirikov-Zorin,G. Chlachidze, F. Chlebana,L. Christofek,M. Chu,Y. Chung, C. Ciobanu,A. Clark, A. Connolly, J. Conway,M. Cordelli,J. Cranshaw, D. Cronin-Hennessy,R. Cropp, R. Culbertson,D. Dagenhart, S. D’Auria,F. DeJongh,S. Dell’Agnello,M. Dell’Orso, L. Demortier,M. Deninno,P. Derwent,T. Devlin, J. Dittmann, A. Dominguez,S. Donati,J. Done,M. D’Onofrio, T. Dorigo,N. Eddy, K. Einsweiler,J. Elias,E. Engels, R. Erbacher, D. Errede, S. Errede,Q. Fan, R. Feild,J. Fernandez, C. Ferretti, R. Field,I. Fiori,B. Flaugher,G. Foster,M. Franklin, J. Freeman,J. Friedman,Y. Fukui, I. Furic,S. Galeotti,A. Gallas, M. Gallinaro,T. Gao, M. Garcia-Sciveres, A. Garfinkel,P. Gatti, C. Gay, D. Gerdes, P. Giannetti,P. Giromini,V. Glagolev,D. Glenzinski,M. Gold,J. Goldstein, A. Gordon,I. Gorelov,A. Goshaw, Y. Gotra, K. Goulianos,C. Green,G. Grim,P. Gris,L. Groer,C. Grosso-Pilcher,M. Guenther,G. Guillian,J. Guimaraes da Costa, R. Haas, C. Haber,E. Hafen,S. Hahn,C. Hall,T. Handa,R. Handler,W. Hao,F. Happacher, K. Hara,A. Hardman,R. Harris,F. Hartmann, K. Hatakeyama, J. Hauser,J. Heinrich,A. Heiss,M. Herndon,C. Hill,K. Hoffman, C. Holck, R. Hollebeek,L. Holloway, R. Hughes, J. Huston, J. Huth,H. Ikeda, J. Incandela,G. Introzzi,J. Iwai,Y. Iwata, E. James,M. Jones, U. Joshi,H. Kambara, T. Kamon,T. Kaneko,K. Karr,H. Kasha,Y. Kato,T. Keaffaber,K. Kelley,M. Kelly,R. Kennedy,R. Kephart,D. Khazins,T. Kikuchi,B. Kilminster, B. Kim,D. Kim,H. Kim, M. Kim, S. Kim,Y. Kim, M. Kirby,M. Kirk, L. Kirsch,S. Klimenko,P. Koehn,A. Köngeter,K. Kondo, J. Konigsberg, K. Kordas, A. Korn, A. Korytov,E. Kovacs, J. Kroll, M. Kruse, S. Kuhlmann,K. Kurino,T. Kuwabara,A. Laasanen,N. Lai,S. Lami,S. Lammel,J. Lamoureux,J. Lancaster,M. Lancaster, R. Lander, G. Latino, T. LeCompte, A. Lee,K. Lee,S. Leone, J. Lewis,M. Lindgren, T. Liss, J. Liu, Y. Liu,D. Litvintsev,O. Lobban,N. Lockyer,J. Loken,M. Loreti,D. Lucchesi,P. Lukens,S. Lusin, L. Lyons, J. Lys,R. Madrak, K. Maeshima, P. Maksimovic,L. Malferrari, M. Mangano,M. Mariotti,G. Martignon, A. Martin,J. Matthews, J. Mayer, P. Mazzanti, K. McFarland,P. McIntyre,E. McKigney,M. Menguzzato, A. Menzione, C. Mesropian, A. Meyer, T. Miao,R. Miller,J. Miller,H. Minato,S. Miscetti,M. Mishina, G. Mitselmakher,N. Moggi,E. Moore,R. Moore,Y. Morita, T. Moulik, M. Mulhearn, A. Mukherjee,T. Muller,A. Munar,P. Murat, S. Murgia, J. Nachtman,V. Nagaslaev, S. Nahn,H. Nakada, I. Nakano, C. Nelson,T. Nelson, C. Neu,D. Neuberger, C. Newman-Holmes,C.-Y. Ngan,H. Niu, L. Nodulman,A. Nomerotski,S. Oh,Y. Oh,T. Ohmoto, T. Ohsugi,R. Oishi,T. Okusawa, J. Olsen,W. Orejudos,C. Pagliarone, F. Palmonari, R. Paoletti,V. Papadimitriou,S. Pappas,D. Partos,J. Patrick, G. Pauletta,M. Paulini, C. Paus,L. Pescara,T. Phillips,G. Piacentino,K. Pitts,A. Pompos,L. Pondrom,G. Pope,M. Popovic,F. Prokoshin,J. Proudfoot,F. Ptohos,O. Pukhov,G. Punzi,K. Ragan,A. Rakitine,D. Reher, A. Reichold,A. Ribon,W. Riegler,F. Rimondi, L. Ristori, M. Riveline,W. Robertson,A. Robinson, T. Rodrigo, S. Rolli,L. Rosenson, R. Roser, R. Rossin,A. Roy,A. Safonov,R. Denis, W. Sakumoto, D. Saltzberg,C. Sanchez, A. Sansoni,L. Santi,H. Sato, P. Savard,P. Schlabach,E. Schmidt, M. Schmidt, M. Schmitt,L. Scodellaro,A. Scott, A. Scribano,S. Segler, S. Seidel, Y. Seiya,A. Semenov,F. Semeria, T. Shah, M. Shapiro,P. Shepard, T. Shibayama, M. Shimojima, M. Shochet, J. Siegrist,A. Sill, P. Sinervo, P. Singh,A. Slaughter, K. Sliwa,C. Smith,F. Snider,A. Solodsky, J. Spalding, T. Speer,P. Sphicas, F. Spinella, M. Spiropulu,L. Spiegel, J. Steele,A. Stefanini, J. Strologas,F. Strumia, D. Stuart, K. Sumorok,T. Suzuki,T. Takano, R. Takashima,K. Takikawa,P. Tamburello,M. Tanaka, B. Tannenbaum,W. Taylor,M. Tecchio,R. Tesarek,P. Teng, K. Terashi,S. Tether,A. Thompson,R. Thurman-Keup,P. Tipton, S. Tkaczyk, D. Toback, K. Tollefson,A. Tollestrup,D. Tonelli,H. Toyoda, W. Trischuk,J. Troconiz,J. Tseng, N. Turini, F. Ukegawa,T. Vaiciulis,J. Valls,S. Vejcik,G. Velev,R. Vidal,R. Vilar, I. Volobouev, D. Vucinic,R. Wagner,N. Wallace,A. Walsh, C. Wang,M. Wang,T. Watanabe, D. Waters,T. Watts,R. Webb,H. Wenzel,W. Wester, A. Wicklund, E. Wicklund,T. Wilkes,H. Williams,P. Wilson,B. Winer, D. Winn,S. Wolbers,D. Wolinski,J. Wolinski, S. Wolinski,S. Worm,X. Wu,J. Wyss,A. Yagil, W. Yao,G. Yeh,P. Yeh, J. Yoh,C. Yosef,T. Yoshida, I. Yu,S. Yu,Z. Yu, A. Zanetti,F. Zetti,S. Zucchelli

PHYSICAL REVIEW D(2002)

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摘要
We present a measurement of the cross section and the first measurement of the heavy flavor content of associated direct photon + muon events produced in hadronic collisions. These measurements come from a sample of 1.8 TeV p (p) over bar collisions recorded with the Collider Detector at Fermilab. Quantum chromodynamics (QCD) predicts that these events are primarily due to the Compton scattering process cg-->cgamma, with the final-state charm quark producing a muon. The cross section for events with a photon transverse momentum between 12 and 40 GeV/c is measured to be 46.8+/-6.3+/-7.5 pb, which is two standard deviations below the most recent theoretical calculation. A significant fraction of the events in the sample contain a final-state bottom quark. The ratio of charm to bottom production is measured to be 2.4+/-1.2, in good agreement with QCD models.
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