A new NLO and NNLO global QCD fit to HERA, Drell-Yan, and W/Z data yields proton PDFs, a strange-sea ratio near 1.07, and projections that EIC data would reduce gluon and alpha_s uncertainties.
Benchmark of deep-inelastic-scattering structure functions at $\mathcal{O}(\alpha_s^3)$
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abstract
We present a benchmark comparison of the massless inclusive deep-inelastic-scattering (DIS) structure functions up to $\mathcal{O}(\alpha_s^3)$ in perturbative QCD. The comparison is performed using the codes APFEL++ and HOPPET within the framework of the variable-flavour-number scheme and over a broad kinematic range relevant to the extraction of parton distribution functions. We provide results for both the single structure functions and the reduced cross sections in both neutral- and charged-current DIS. Look-up tables for future reference are included, and we also release the code used for the benchmark.
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Revisiting constraints on proton PDFs from HERA DIS, Drell-Yan, W/Z Boson production, and projected EIC measurements
A new NLO and NNLO global QCD fit to HERA, Drell-Yan, and W/Z data yields proton PDFs, a strange-sea ratio near 1.07, and projections that EIC data would reduce gluon and alpha_s uncertainties.