English

NLO PDFs from the ABMP16 fit

High Energy Physics - Phenomenology 2018-09-10 v2

Abstract

We perform a global fit of parton distribution functions (PDFs) together with the strong coupling constant αs\alpha_s and the quark masses mcm_c, mbm_b and mtm_t at next-to-leading order (NLO) in QCD. The analysis applies the MS\overline{\mathrm{MS}}\, renormalization scheme for αs\alpha_s and all quark masses. It is performed in the fixed-flavor number scheme for nf=3,4,5n_f=3, 4, 5 and uses the same data as the previous fit of the ABMP16 PDF at next-to-next-to-leading order (NNLO). The new NLO PDFs complement the set of ABMP16 PDFs and are to be used consistently with NLO QCD predictions for hard scattering processes. At NLO we obtain the value αs(nf=5)(MZ)=0.1191±0.0011\alpha_s^{(n_f=5)}(M_Z) = 0.1191 \pm 0.0011 compared to αs(nf=5)(MZ)=0.1147±0.0008\alpha_s^{(n_f=5)}(M_Z) = 0.1147 \pm 0.0008 at NNLO.

Keywords

Cite

@article{arxiv.1803.07537,
  title  = {NLO PDFs from the ABMP16 fit},
  author = {S. Alekhin and J. Blümlein and S. Moch},
  journal= {arXiv preprint arXiv:1803.07537},
  year   = {2018}
}

Comments

12 pages pdflatex, 4 figures, 5 tables, journal version

R2 v1 2026-06-23T00:59:12.161Z