Measurement of direct-photon production at the Fermilab Tevatron fixed target energies

L. Apanasevich,J. Bacigalupi,W. F. Baker,Michael Begel,Steven Blusk,C. Bromberg,P. Chang,Brajesh C Choudhary,W. H. Chung,L. de Barbaro,W. DeSoi,W. Dlugosz,J. Dunlea,E. Engels,G. Fanourakis,Thomas Ferbel,J. Ftacnik,D. A. Garelick,G. Ginther,M. J. Glaubman,Phillip Gutierrez,K. Hartman,J. Huston,C. Johnstone,V. Kapoor,J. Kuehler,C. Lirakis,F. Lobkowicz,P. Lukens,J. Mansour,A. Maul,R. J. Miller,B.Y. Oh,G. Osborne,D.E. Pellett,E. Prebys,R. Roser,Pf Shepard,R. K. Shivpuri,D. Skow,P. Slattery,L. Sorrell,D. Striley,W.S. Toothacker,S. M. Tripathi,N. Varelas,D. Weerasundara,J. J. Whitmore,T. Yasuda,C. Yosef,M. Zielinski,V. Zutshi

Measurement of direct-photon production at the Fermilab Tevatron fixed target energies

2004

Measurements of the production of high transverse momentum direct photons by a 515 GeV/c {pi}{sup -} beam and 530 and 800 GeV/c proton beams in interactions with beryllium and hydrogen targets are presented. The data span the kinematic ranges of 3.5perturbative QCD calculations and expectations based on a phenomenological parton-k{sub T} model.

Keywords:

Quantum electrodynamics
Quantum chromodynamics
Fermilab
Pi
Perturbative QCD
Photon
Proton
Tevatron
Particle physics
Physics
Momentum
Parton
Nuclear physics
Rapidity

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