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Cross section and heavy quark composition of γ+¼ events produced in pp̅ 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. W. Bailey
  • , S. Bailey
  • , P. De Barbaro
  • , A. Barbaro-Galtieri
  • , V. E. Barnes
  • B. A. Barnett, S. Baroiant, M. Barone, G. Bauer, F. Bedeschi, S. Belforte, W. H. Bell, G. Bellettini, J. Bellinger, D. Benjamin, J. Bensinger, A. Beretvas, J. P. Berge, J. Berryhill, B. Bevensee, A. Bhatti, M. Binkley, D. Bisello, M. Bishai, R. E. Blair, C. Blocker, K. Bloom, B. Blumenfeld, S. R. Blusk, A. Bocci, A. Bodek, W. Bokhari, G. Bolla, Y. Bonushkin, D. Bortoletto, J. Boudreau, A. Brandl, S. Van Den Brink, C. Bromberg, M. Brozovic, N. Bruner, E. Buckley-Geer, J. Budagov, H. S. Budd, K. Burkett, G. Busetto, A. Byon-Wagner, K. L. Byrum, P. Calafiura, M. Campbell, W. Carithers, J. Carlson, D. Carlsmith, W. Caskey, J. Cassada, A. Castro, D. Cauz, A. Cerri, A. W. Chan, P. S. Chang, P. T. Chang, J. Chapman, C. Chen, Y. C. Chen, M. T. Cheng, M. Chertok, G. Chiarelli, I. Chirikov-Zorin, G. Chlachidze, F. Chlebana, L. Christofek, M. L. Chu, Y. S. Chung, C. I. Ciobanu, A. G. Clark, A. Connolly, J. Conway, M. Cordelli, J. Cranshaw, D. Cronin-Hennessy, R. Cropp, R. Culbertson, D. Dagenhart, S. Auria, F. Jongh, S. Dell’Agnello, M. Dell’Orso, L. Demortier, M. Deninno, P. F. Derwent, T. Devlin, J. R. Dittmann, A. Dominguez, S. Donati, J. Done, M. D’Onofrio, T. Dorigo, N. Eddy, K. Einsweiler, J. E. Elias, E. Engels, R. Erbacher, D. Errede, S. Errede, Q. Fan, R. G. Feild, J. P. Fernandez, C. Ferretti, R. D. Field, I. Fiori, B. Flaugher, G. W. Foster, M. Franklin, J. Freeman, J. Friedman, Y. Fukui, I. Furic, S. Galeotti, M. Gallinaro, T. Gao, M. Garcia-Sciveres, A. F. Garfinkel, P. Gatti, C. Gay, D. W. Gerdes, P. Giannetti, P. Giromini, V. Glagolev, D. Glenzinski, M. Gold, J. Goldstein, A. Gordon, I. Gorelov, A. T. 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. M. Haas, C. Haber, E. Hafen, S. R. Hahn, C. Hall, T. Handa, R. Handler, W. Hao, F. Happacher, K. Hara, A. D. Hardman, R. M. Harris, F. Hartmann, K. Hatakeyama, J. Hauser, J. Heinrich, A. Heiss, M. Herndon, C. Hill, K. D. 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. A. Keaffaber, K. Kelley, M. Kelly, R. D. Kennedy, R. Kephart, D. Khazins, T. Kikuchi, B. Kilminster, B. J. Kim, D. H. Kim, H. S. Kim, M. J. Kim, S. B. Kim, S. H. Kim, Y. K. 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. E. Kuhlmann, K. Kurino, T. Kuwabara, A. T. Laasanen, N. Lai, S. Lami, S. Lammel, J. I. Lamoureux, J. Lancaster, M. Lancaster, R. Lander, G. Latino, T. Lecompte, A. M. Lee, K. Lee, S. Leone, J. D. Lewis, M. Lindgren, T. M. Liss, J. B. Liu, Y. C. Liu, D. O. 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. A.J. Matthews, J. Mayer, P. Mazzanti, K. S. McFarland, P. McIntyre, E. McKigney, M. Menguzzato, A. Menzione, C. Mesropian, A. Meyer, T. Miao, R. Miller, J. S. 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.P. Ngan, H. Niu, L. Nodulman, A. Nomerotski, S. H. Oh, Y. D. Oh, T. Ohmoto, T. Ohsugi, R. Oishi, T. Okusawa, J. Olsen, W. Orejudos, C. Pagliarone, F. Palmonari, R. Paoletti, V. Papadimitriou, S. P. Pappas, D. Partos, J. Patrick, G. Pauletta, M. Paulini, C. Paus, L. Pescara, T. J. Phillips, G. Piacentino, K. T. 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. J. Robertson, A. Robinson, T. Rodrigo, S. Rolli, L. Rosenson, R. Roser, R. Rossin, A. Roy, A. Safonov, R. St. Denis, W. K. Sakumoto, D. Saltzberg, C. Sanchez, A. Sansoni, L. Santi, H. Sato, P. Savard, P. Schlabach, E. E. Schmidt, M. P. Schmidt, M. Schmitt, L. Scodellaro, A. Scott, A. Scribano, S. Segler, S. Seidel, Y. Seiya, A. Semenov, F. Semeria, T. Shah, M. D. Shapiro, P. F. Shepard, T. Shibayama, M. Shimojima, M. Shochet, J. Siegrist, A. Sill, P. Sinervo, P. Singh, A. J. Slaughter, K. Sliwa, C. Smith, F. D. 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. K. Teng, K. Terashi, S. Tether, A. S. Thompson, R. Thurman-Keup, P. Tipton, S. Tkaczyk, D. Toback, K. Tollefson, A. Tollestrup, D. Tonelli, H. Toyoda, W. Trischuk, J. F. De Troconiz, J. Tseng, N. Turini, F. Ukegawa, T. Vaiciulis, J. Valls, S. Vejcik, G. Velev, R. Vidal, R. Vilar, I. Volobouev, D. Vucinic, R. G. Wagner, R. L. Wagner, N. B. Wallace, A. M. Walsh, C. Wang, M. J. Wang, T. Watanabe, D. Waters, T. Watts, R. Webb, H. Wenzel, W. C. Wester, A. B. Wicklund, E. Wicklund, T. Wilkes, H. H. Williams, P. Wilson, B. L. Winer, D. Winn, S. Wolbers, D. Wolinski, J. Wolinski, S. Wolinski, S. Worm, X. Wu, J. Wyss, A. Yagil, W. Yao, G. P. Yeh, P. Yeh, J. Yoh, C. Yosef, T. Yoshida, I. Yu, S. Yu, Z. Yu, A. Zanetti, F. Zetti, S. Zucchelli
  • Lawrence Berkeley National Laboratory
  • Waseda University
  • Rockefeller University
  • Fermi National Accelerator Laboratory
  • The University of Chicago
  • University of Michigan, Ann Arbor
  • Massachusetts Institute of Technology
  • Academia Sinica - Institute of Physics
  • University of Tsukuba
  • University of Oxford
  • University of Padua
  • University of Pisa
  • Harvard University
  • University of Rochester
  • Purdue University
  • Johns Hopkins University
  • University of California at Davis
  • National Institute for Nuclear Physics
  • Scuola Normale Superiore di Pisa
  • University of Trieste
  • University of Glasgow
  • University of Wisconsin-Madison
  • Duke University
  • Brandeis University
  • University of Pennsylvania
  • Argonne National Laboratory
  • University of California at Los Angeles
  • University of Pittsburgh
  • Michigan State University
  • Joint Institute for Nuclear Research
  • University of Bologna
  • University of Illinois at Urbana-Champaign
  • Ohio State University
  • University of Geneva
  • Rutgers - The State University of New Jersey, New Brunswick
  • Texas Tech University
  • McGill University
  • University of Toronto
  • Tufts University
  • Texas A&M University
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  • University of Florida
  • High Energy Accelerator Research Organization, Tsukuba
  • Hiroshima University
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  • Osaka Metropolitan University
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  • Seoul National University
  • Sungkyunkwan University
  • Carnegie Mellon University
  • Universidad de Cantabria
  • Northwestern University

Research output: Contribution to journalArticlepeer-review

Abstract

We present a measurement of the cross section and the first measurement of the heavy flavor content of associated direct photon 1 muon events produced in hadronic collisions. These measurements come from a sample of 1.8 TeV pp̅ collisions recorded with the Collider Detector at Fermilab. Quantum chromodynamics (QCD) predicts that these events are primarily due to the Compton scattering process cg→ γ+μ, 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.

Original languageEnglish
Article number012003
Pages (from-to)012003-1-012003-7
JournalPhysical Review D
Volume65
Issue number1
DOIs
StatePublished - 2001

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