Photoproduction of Heavy Quarks in Next-to-Leading Order QCD with Longitudinally Polarized Initial States

Abstract

We present all relevant details of our calculation of the complete next-to-leading order (O(alpha_s^2 alpha)) QCD corrections to heavy flavor photoproduction with longitudinally polarized point-like photons and hadrons. In particular we provide analytical results for the virtual plus soft gluon cross section. We carefully address the relevance of remaining theoretical uncertainties by varying, for instance, the factorization and renormalization scales independently. Such studies are of importance for a meaningful first direct determination of the polarized gluon density Delta g from the total charm production spin asymmetry by the upcoming COMPASS experiment. It is shown that the scale uncertainty is considerably reduced in next-to-leading order, but the dependence on the charm quark mass is sizable at fixed target energies. Finally, we study several differential single-inclusive heavy quark distributions and, for the polarized HERA option, the total bottom spin asymmetry.

47 pages, LaTeX, 12 figures, uses amssymb, axodraw, and epsfig styles

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• Next-to-Leading Order QCD Analysis of Polarized Deep Inelastic Scattering Data
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Cited by in corpus (29)

• Extraction of Spin-Dependent Parton Densities and Their Uncertainties
• Spin Physics and Polarized Structure Functions
• The Spin Structure of the Nucleon
• Inclusive D^{*+-} Production in p p-bar Collisions with Massive Charm Quarks
• Theory of hard photoproduction
• Leading and Next-to-Leading Order Gluon Polarisation in the Nucleon and Longitudinal Double Spin Asymmetries from Open Charm Muoproduction
• Inclusive and Semi-Inclusive Polarized DIS Data Revisited
• Next-to-Leading Order QCD Corrections to the Polarized Hadroproduction of Heavy Flavors
• Next-to-Leading Order QCD Corrections to Inclusive Heavy-Flavor Production in Polarized Deep-Inelastic Scattering
• Isolated-photon production in polarized pp collisions
• Heavy-quark axial charges to non-leading order
• One-loop corrections to four-point functions with two external massive fermions and two external massless partons
• Perturbative Stability of the QCD Predictions for Single Spin Asymmetry in Heavy Quark Photoproduction
• One-loop amplitudes for four-point functions with two external massive quarks and two external massless partons up to O(epsilon^2)
• Prospects of Open Charm Production at GSI-FAIR and J-PARC
• $O({\alpha }_s^2$) Polarized Heavy Flavor Corrections}to Deep-Inelastic Scattering at $Q^2\gg m^2$
• NLO differential distributions of massive lepton-pair production in longitudinally polarized proton-proton collisions
• Soft Gluon Resummation for Polarized Deep-inelastic Production of Heavy Quarks
• Polarized Photoproduction of Heavy Quarks in Next-to-Leading Order
• Next-to-Leading Order QCD Corrections to Heavy Quark Correlations in Longitudinally Polarized Hadron-Hadron Collisions
• Measurements of Delta G/G
• Ghost contributions to charmonium production in polarized high-energy collisions
• D* and D Meson Production in Muon Nucleon Interactions at 160 GeV/c
• Longitudinally Polarized Photoproduction of Heavy Flavors at Next-to-Leading Order of QCD
• Extraction of characteristic constants in QCD with perturbative and nonperturbative methods
• Differential Heavy Quark Distributions and Correlations in Longitudinally Polarized Deep-Inelastic Scattering
• Photoproduction of heavy quarks at HERA
• Polarized Heavy Quark Photoproduction in Next to Leading Order
• Polarized lepton nucleon scattering -- summary of the theory talks on spin physics at DIS 99