Heavy quark effects on parton distribution functions in the unpolarized virtual photon up to the next-to-leading order in QCD

Abstract

We investigate the heavy quark mass effects on the parton distribution functions in the unpolarized virtual photon up to the next-to-leading order in QCD. Our formalism is based on the QCD-improved parton model described by the DGLAP evolution equation as well as on the operator product expansion supplemented by the mass-independent renormalization group method. We evaluate the various components of the parton distributions inside the virtual photon with the massive quark effects, which are included through the initial condition for the heavy quark distributions, or equivalently from the matrix element of the heavy quark operators. We discuss some features of our results for the heavy quark effects and their factorization-scheme dependence.

16 pages, 16 figures, version to appear in Phys. Rev. D

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Cited by in corpus (4)

• Resummation of large logarithms in the heavy quark effects on the parton distributions inside the virtual photon
• Photon Structure Function in Supersymmetric QCD Revisited
• Squark Contributions to Photon Structure Functions and Positivity Constraints
• Photon structure functions with heavy particle mass effects