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

Abstract

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.

arXiv comment19 pages, LaTeX, 2 figures as eps files

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Cited by in corpus (13)

• Update on transversity and Collins functions from SIDIS and e+ e- data
• Accessing transversity via J/Psi production in polarized p-pbar interactions
• Asymmetries involving dihadron fragmentation functions: from DIS to e+e- annihilation
• Conceptual design of the Spin Physics Detector
• Dilepton production near partonic threshold in transversely polarized proton-antiproton collisions
• Transverse single-spin asymmetries in $p^{\uparrow }p\to \gamma X$ from quark-gluon-quark correlations in the proton
• Double Transverse-Spin Asymmetries in Drell-Yan Processes with Antiprotons
• Next-to-leading order QCD corrections to single-inclusive hadron production in transversely polarized p-p and pbar-p collisions
• Soft gluon corrections to double transverse-spin asymmetries for small-$Q_T$ dilepton production at RHIC and J-PARC
• Transversity K Factors for Drell-Yan
• Positivity constraints on initial spin observables in inclusive reactions
• Positivity bounds for Sivers functions
• Transversity and heavy quark production on hadron colliders