1998
article
Jet pseudorapidity distribution in direct photon events in p{bar p} collisions at {radical} (s) =1.8TeV
R. E. Blair, K. L. Byrum, D. Crane, T. A. Fuess, S. E. Kuhlmann, L. Nodulman, J. Proudfoot, M. Deninno, I. Fiori, G. Piacentino, F. Rimondi, S. Behrends, J. R. Bensinger, C. Blocker, J. D. Cunningham, L. Kirsch, J. I. Lamoureux, C. Anway-Wiese, J. Hauser, F. Keyvan, S. Lammel, M. Lindgren, Th. Müller, D. Neuberger, M. Contreras, S. C. Eno, H. Frisch, C. Grosso-Pilcher, S. Köpp, M.L. Miller, J. Romano, D. Saltzberg, J. Dittmann, A. T. Goshaw, H. Grassmann, S.A. Hauger, D. Cronin-Hennessy, W. Kowald, S. H. Oh, T. J. Phillips, W. J. Robertson, M. Albrow, H. Areti, M. Atac, A. Beretvas, J. P. Bergé, M. Binkley, E. Buckley‐Geer, R. G. Wagner, C. Campagnari, A. Caner, S. Cihangir, J. Cooper, F. DeJongh, S. Delchamps, J. E. Elias, B. Flaugher, G. W. Foster, J. Freeman, S. Geer, S. R. Hahn, R. M. Harris, J. Hylen, J. Incandela, H. Jensen, U. Joshi, E. Kajfasz, R. Kephart, H. Keutelian, D.H. Kim, W. Koska, E. Kovacs, J. D. Lewis, P. Limon, P. Lukens, K. Maeshima, J. P. Marriner, A. Mukherjee, Charles A. Nelson, C. Newman-Holmes, S. Park, J. Patrick, R. Plunkett, T. Rodrigo, E. E. Schmidt, S. Bertolucci, M. Cordelli, P. Giromini, L. Keeble, S. Miscetti, A. Sansoni, T. Baumann, G. Brandenburg, M. Franklin, A. Gordon, R. Hamilton, P. Hurst, J. Huth, C. Jessop
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Le résumé fourni par la source
We present the first measurement of the jet pseudorapidity distribution in direct photon events from a sample of p{bar p} collisions at {radical} (s) =1.8TeV, recorded with the Collider Detector at Fermilab. Quantum chromodynamics (QCD) predicts that these events are primarily from hard quark-gluon Compton scattering, qg{r_arrow}q{gamma}, with the final state quark producing the jet of hadrons. The jet pseudorapidity distribution in this model is sensitive to parton momentum fractions between 0.015 and 0.15. We find that the shape of the measured pseudorapidity distribution agrees well with next-to-leading order QCD calculations. {copyright} {ital 1997} {ital The American Physical Society}
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Les sujets associés
High-Energy Particle Collisions ResearchParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle Interactions