Massive charged-current coefficient functions in deep-inelastic scattering at NNLO and impact on strange-quark distributions

TL;DR

This paper calculates advanced QCD corrections to deep-inelastic scattering processes involving charm quarks, providing tools to improve the precision of strange-quark distribution measurements from neutrino scattering data.

Contribution

It introduces a detailed NNLO calculation of charged-current coefficient functions and a fast interpolation interface for practical cross-section evaluations.

Findings

Good agreement with NuTeV and CCFR dimuon data

Enhanced precision in strange-quark distribution extraction

Provides a computational tool for rapid cross-section evaluation

Abstract

We present details on calculation of next-to-next-to-leading order QCD corrections to massive charged-current coefficient functions in deep-inelastic scattering. Especially we focus on the application to charm-quark production in neutrino scattering on fixed target that can be measured via the dimuon final state. We construct a fast interface to the calculation so for any parton distributions the cross sections can be evaluated within milliseconds by using the pre-generated interpolation grids. We discuss agreements of various theoretical predicitons with the NuTeV and CCFR dimuon data and the impact of the results on determination of the strange-quark distributions.