Higher order QCD corrections to charged-lepton deep-inelastic scattering and global fits of parton distributions

Details Higher order QCD corrections to charged-lepton deep-inelastic scattering and global fits of parton distributions Higher order QCD corrections to charged-lepton deep-inelastic scattering and global fits of parton distributions

2008-11-10

arxiv.org/abs/0811.1412v2

Phys.Lett.B672:166-171,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 6 figures, latex, extended journal version

Scientific paper

10.1016/j.physletb.2009.01.004

We study the perturbative QCD corrections to heavy-quark structure functions of charged-lepton deep-inelastic scattering and their impact on global fits of parton distributions. We include the logarithmically enhanced terms near threshold due to soft gluon resummation in the QCD corrections at next-to-next-to-leading order. We demonstrate that this approximation is sufficient to describe the available HERA data in most parts of the kinematic region. The threshold-enhanced next-to-next-to-leading order corrections improve the agreement between predictions based on global fits of the parton distribution functions and the HERA collider data even in the small-x region.

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