Next-to-leading order QCD corrections to A_TT for prompt photon production

Details Next-to-leading order QCD corrections to A_TT for prompt photon production Next-to-leading order QCD corrections to A_TT for prompt photon production

2003-03-26

arxiv.org/abs/hep-ph/0303226v1

Phys.Rev. D67 (2003) 114006

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, LaTeX, 2 figures as eps files

Scientific paper

10.1103/PhysRevD.67.114006

We present a next-to-leading order QCD calculation of the cross section for isolated large-p_T prompt photon production in collisions of transversely polarized protons. We devise a simple method of dealing with the phase space integrals in dimensional regularization in the presence of the cos(2 phi) azimuthal-angular dependence occurring for transverse polarization. Our results allow to calculate the double-spin asymmetry A_TT for this process at next-to-leading order accuracy, which may be used at BNL-RHIC to measure the transversity parton distributions of the proton.

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