N³LO DIS implementation in VFNS with improved massive neutral-current coefficient approximation for PDF fits.
On the next-to-next-to-leading order QCD corrections to heavy-quark production in deep-inelastic scattering
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abstract
The contribution of quarks with masses m >> Lambda_QCD is the only part of the structure functions in deep-inelastic scattering (DIS) which is not yet known at the next-to-next-to-leading order (NNLO) of perturbative QCD. We present improved partial NNLO results for the most important structure function F_2(x,Q^2) near the partonic threshold, in the high-energy (small-x) limit and at high scales Q^2 >> m^2; and employ these results to construct approximations for the gluon and quark coefficient functions which cover the full kinematic plane. The approximation uncertainties are carefully investigated, and found to be large only at very small values, x smaller about 10^-3, of the Bjorken variable.
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hep-ph 2years
2026 2verdicts
UNVERDICTED 2representative citing papers
NLO QCD heavy-quark pair production in DIS matched to parton shower in POWHEG, gluon-initiated channel only, with virtual correction validation via massification.
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Implementation of DIS at N$^3$LO for PDF determination
N³LO DIS implementation in VFNS with improved massive neutral-current coefficient approximation for PDF fits.
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Heavy-quark pair-production in DIS at NLO QCD matched to a parton shower
NLO QCD heavy-quark pair production in DIS matched to parton shower in POWHEG, gluon-initiated channel only, with virtual correction validation via massification.