Next-to-leading order evolution of generalized parton distributions for HERA and HERMES

Details Next-to-leading order evolution of generalized parton distributions for HERA and HERMES Next-to-leading order evolution of generalized parton distributions for HERA and HERMES

2001-06-11

arxiv.org/abs/hep-ph/0106115v3

Phys.Rev.D65:056012,2002; Erratum-ibid.D66:079903,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 8 figures, latex, uses revtex style files, published version + corrections of erratum edited in. references updated

Scientific paper

10.1103/PhysRevD.65.056012

The QCD evolution of both unpolarized and polarized generalized parton distributions (GPDs) to next-to-leading order (NLO) accuracy is presented, in both the DGLAP and ERBL regions, for two appropriately symmetrized input distributions based on conventional parton density functions. To illustrate the relative size of the NLO corrections a comparison is made with leading order evolution of the same distributions. For the first time, NLO results are given for both small and large values of the skewedness parameter, $\zeta = x_{bj}$, i.e. for all of the kinematic range relevant to HERA and HERMES.

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