PDF fit in the fixed-flavor-number scheme

Details PDF fit in the fixed-flavor-number scheme PDF fit in the fixed-flavor-number scheme

2012-02-21

arxiv.org/abs/1202.4642v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages with 10 figures, to appear in the proceedings of the "Ringberg Workshop: New Trends in HERA Physics 2011", Ringberg C

Scientific paper

We discuss the heavy-quark contribution to deep inelastic scattering in the scheme with $n_f=3,4,5$ fixed flavors. Based on the recent ABM11 PDF analysis of world data for deep-inelastic scattering and fixed-target data for the Drell-Yan process with the running-mass definition for heavy quarks we show that fixed flavor number scheme is sufficient for describing the deep-inelastic-scattering data in the entire kinematic range. We compare with other PDF sets and comment on the implications for measuring the strong coupling constant $\alpha_s(M_Z)$.

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