Polarized Double Photon Production in QCD to Order ${\alpha }_s$

Abstract

We present a complete order ${\alpha }_s$ analysis of the process $pp\to \gamma \gamma +X$ with polarized initial states, previously studied by us with leading order structure functions. We include in our calculation new sets of parton densities evolved in NLO QCD, such as those of Gehrmann and Stirling and of Glück et al., which incorporate the new anomalous dimensions of Mertig and Van Neerven in the evolution equation. A detailed phenomenological analysis is also given which includes the photon isolation. Our results indicate that the asymmetries, although not very large, should be substantial enough at RHIC energies to be measurable in future planned experiments.

29 pages revtex, 13 psfigs

References in corpus (5)

• Global QCD Analysis and the CTEQ Parton Distributions
• Measurement of the Spin-Dependent Structure Function $g_1(x)$ of the Proton
• Next-to-Leading Order Radiative Parton Model Analysis of Polarized Deep Inelastic Scattering
• Polarized Parton Distributions in the Nucleon
• How to Use Weak Decays in Analyses of Data on Nucleon Spin Structure Functions

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