Phys. Rev. Lett.
71,
679–683
(1993)
Center-of-mass angular distribution of prompt photons produced in pp¯ collisions at √s =1.8 TeV
F. Abe et al.
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F. Abe, M. Albrow, D. Amidei, C. Anway-Wiese, G. Apollinari, M. Atac, P. Auchincloss, P. Azzi, N. Bacchetta, A. R. Baden, W. Badgett, M. W. Bailey, A. Bamberger, P. de Barbaro, A. Barbaro-Galtieri, V. E. Barnes, B. A. Barnett, G. Bauer, T. Baumann, F. Bedeschi, S. Behrends, S. Belforte, G. Bellettini, J. Bellinger, D. Benjamin, J. Benlloch, J. Bensinger, A. Beretvas, J. P. Berge, S. Bertolucci, K. Biery, S. Bhadra, M. Binkley, D. Bisello, R. Blair, C. Blocker, A. Bodek, V. Bolognesi, A. W. Booth, C. Boswell, G. Brandenburg, D. Brown, E. Buckley-Geer, H. S. Budd, G. Busetto, A. Byon-Wagner, K. L. Byrum, C. Campagnari, M. Campbell, A. Caner, R. Carey, W. Carithers, D. Carlsmith, J. T. Carroll, R. Cashmore, A. Castro, Y. Cen, F. Cervelli, K. Chadwick, J. Chapman, G. Chiarelli, W. Chinowsky, S. Cihangir, A. G. Clark, M. Cobal, D. Connor, M. Contreras, J. Cooper, M. Cordelli, D. Crane, J. D. Cunningham, C. Day, F. DeJongh, S. Dell’Agnello, M. Dell’Orso, L. Demortier, B. Denby, P. F. Derwent, T. Devlin, D. DiBitonto, M. Dickson, R. B. Drucker, A. Dunn, K. Einsweiler, J. E. Elias, R. Ely, S. Eno, S. Errede, A. Etchegoyen, B. Farhat, M. Frautschi, G. J. Feldman, B. Flaugher, G. W. Foster, M. Franklin, J. Freeman, H. Frisch, T. Fuess, Y. Fukui, A. F. Garfinkel, A. Gauthier, S. Geer, D. W. Gerdes, P. Giannetti, N. Giokaris, P. Giromini, L. Gladney, M. Gold, J. Gonzalez, K. Goulianos, H. Grassmann, G. M. Grieco, R. Grindley, C. Grosso-Pilcher, C. Haber, S. R. Hahn, R. Handler, K. Hara, B. Harral, R. M. Harris, S. A. Hauger, J. Hauser, C. Hawk, T. Hessing, R. Hollebeek, L. Holloway, A. Hölscher, S. Hong, G. Houk, P. Hu, B. Hubbard, B. T. Huffman, R. Hughes, P. Hurst, J. Huth, J. Hylen, M. Incagli, T. Ino, H. Iso, H. Jensen, C. P. Jessop, R. P. Johnson, U. Joshi, R. W. Kadel, T. Kamon, S. Kanda, D. A. Kardelis, I. Karliner, E. Kearns, L. Keeble, R. Kephart, P. Kesten, R. M. Keup, H. Keutelian, D. Kim, S. B. Kim, S. H. Kim, Y. K. Kim, L. Kirsch, K. Kondo, J. Konigsberg, K. Kordas, E. Kovacs, M. Krasberg, S. E. Kuhlmann, E. Kuns, A. T. Laasanen, S. Lammel, J. I. Lamoureux, S. Leone, J. D. Lewis, W. Li, P. Limon, M. Lindgren, T. M. Liss, N. Lockyer, M. Loreti, E. H. Low, D. Lucchesi, C. B. Luchini, P. Lukens, P. Maas, K. Maeshima, M. Mangano, J. P. Marriner, M. Mariotti, R. Markeloff, L. A. Markosky, J. A. J. Matthews, R. Mattingly, P. McIntyre, A. Menzione, E. Meschi, T. Meyer, S. Mikamo, M. Miller, T. Mimashi, S. Miscetti, M. Mishina, S. Miyashita, Y. Morita, S. Moulding, J. Mueller, A. Mukherjee, T. Muller, L. F. Nakae, I. Nakano, C. Nelson, D. Neuberger, C. Newman-Holmes, J. S. T. Ng, M. Ninomiya, L. Nodulman, S. Ogawa, R. Paoletti, V. Papadimitriou, A. Para, E. Pare, S. Park, J. Patrick, G. Pauletta, L. Pescara, T. J. Phillips, A. G. Piacentino, R. Plunkett, L. Pondrom, J. Proudfoot, F. Ptohos, G. Punzi, D. Quarrie, K. Ragan, G. Redlinger, J. Rhoades, M. Roach, F. Rimondi, L. Ristori, W. J. Robertson, T. Rodrigo, T. Rohaly, A. Roodman, W. K. Sakumoto, A. Sansoni, R. D. Sard, A. Savoy-Navarro, V. Scarpine, P. Schlabach, E. E. Schmidt, O. Schneider, M. H. Schub, R. Schwitters, G. Sciacca, A. Scribano, S. Segler, S. Seidel, Y. Seiya, G. Sganos, M. Shapiro, M. N. Shaw, M. Sheaff, M. Shochet, J. Siegrist, A. Sill, P. Sinervo, J. Skarha, K. Sliwa, D. A. Smith, F. D. Snider, L. Song, T. Song, M. Spahn, P. Sphicas, A. Spies, R. St. Denis, L. Stanco, A. Stefanini, G. Sullivan, K. Sumorok, R. L. Swartz, Jr., M. Takano, K. Takikawa, S. Tarem, F. Tartarelli, S. Tether, D. Theriot, M. Timko, P. Tipton, S. Tkaczyk, A. Tollestrup, J. Tonnison, W. Trischuk, Y. Tsay, J. Tseng, N. Turini, F. Ukegawa, D. Underwood, S. Vejcik, III, R. Vidal, R. G. Wagner, R. L. Wagner, N. Wainer, R. C. Walker, J. Walsh, A. Warburton, G. Watts, T. Watts, R. Webb, C. Wendt, H. Wenzel, W. C. Wester, III, T. Westhusing, S. N. White, A. B. Wicklund, E. Wicklund, H. H. Williams, B. L. Winer, J. Wolinski, D. Y. Wu, X. Wu, J. Wyss, A. Yagil, K. Yasuoka, Y. Ye, G. P. Yeh, J. Yoh, M. Yokoyama, J. C. Yun, A. Zanetti, F. Zetti, S. Zhang, W. Zhang, and S. Zucchelli
Argonne National Laboratory, Argonne, Illinois 60439
Brandeis University, Waltham, Massachusetts 02254
University of California at Los Angeles, Los Angeles, California 90024
University of Chicago, Chicago, Illinois 60637
Duke University, Durham, North Carolina 27706
Fermi National Accelerator Laboratory, Batavia, Illinois 60510
Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, Frascati, Italy
Harvard University, Cambridge, Massachusetts 02138
University of Illinois, Urbana, Illinois 61801
Institute of Particle Physics, McGill University, Montreal, and University of Toronto, Toronto, Canada
The Johns Hopkins University, Baltimore, Maryland 21218
National Laboratory for High Energy Physics (KEK), Tsukuba, Ibaraki-ken Japan
Lawrence Berkeley Laboratory, Berkeley, California 94720
Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
University of Michigan, Ann Arbor, Michigan 48109
University of New Mexico, Albuquerque, New Mexico 87131
Università di Padova, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy
University of Pennsylvania, Philadelphia, Pennsylvania 19104
University of Pittsburgh, Pittsburgh, Pennsylvania 15260
Istituto Nazionale di Fisica Nucleare, University and Scuola Normale Superiore of Pisa, I-56100 Pisa, Italy
Purdue University, West Lafayette, Indiana 47907
University of Rochester, Rochester, New York 15627
Rockefeller University, New York, New York 10021
Rutgers University, Piscataway, New Jersey 08854
Texas A&M University, College Station, Texas 77843
University of Tsukuba, Tsukuba, Ibaraki 305, Japan
Tufts University, Medford, Massachusetts 02155
University of Wisconsin(enMadison, Madison, Wisconsin 53706
Received 3 March 1993; published in the issue dated 2 August 1993
Data taken with the Collider Detector at Fermilab (CDF) during the 1988–1989 run of the Tevatron are used to measure the distribution of the center-of-mass (rest frame of the initial state partons) angle between isolated prompt photons and the beam direction. The shape of the angular distribution for photon-jet events is found to be significantly different from that observed in dijet data. The QCD predictions show qualitative agreement with the observed prompt photon angular distribution.
© 1993 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.71.679
DOI:
10.1103/PhysRevLett.71.679
PACS:
13.85.Qk, 12.38.Qk, 14.80.Er
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