Spin structure function of virtual photon and polarized parton distributions

Details Spin structure function of virtual photon and polarized parton distributions Spin structure function of virtual photon and polarized parton distributions

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..570..561s&link_type=abstract

The fourteenth international spin physics symposium, SPIN2000. AIP Conference Proceedings, Volume 570, pp. 561-565 (2001).

Physics

Polarization In Interactions And Scattering, Perturbative Calculations, Specific Calculations

Scientific paper

The structure function g1γ(x,Q2,P2) and parton distributions of polarized virtual photon target are investigated in pQCD up to the next-to-leading order (NLO). It is found that the NLO corrections significantly modify the leading log result of g1γ, in particular, both at small and large x. Parton distributions, predicted entirely up to NLO, are factorization-scheme-dependent. Analysis is made in four different factorization schemes. The scheme dependence is clearly seen in the n=1 moments and the large-x behaviors of quark parton distributions. Through the analysis of the scheme dependence of parton distributions, the non-vanishing result of the first moment of g1γ is understood to be connected to QED and QCD axial anomaly. .

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