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