Update of the global fit of PDFs including the low-Q DIS data

Details Update of the global fit of PDFs including the low-Q DIS data Update of the global fit of PDFs including the low-Q DIS data

2008-10-27

arxiv.org/abs/0810.4893v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures. To appear in the proceedings of the 16th International Workshop on Deep-Inelastic Scattering and Related S

Scientific paper

We perform the next-to-next-leading-order (NNLO) QCD global fit of PDFs using inclusive charged-lepton and neutrino DIS data down to Q = 1 GeV. We also consider the data on neutrino-nucleon dimuon production, that allows us to disentangle the strange sea distribution. The fit results in \chi^2/NDP = 5150/4338 = 1.2 that demonstrates a good consistency of the data sets used in analysis. The resulting value of \alpha_s(M_Z) = 0.1136+- 0.0007(exp.) is in a good agreement with the previous version of the fit with a more stringent cut on Q. This analysis allows us to improve the accuracy of PDFs. The HT terms of the neutrino-nucleon structure functions F_2 and xF_3 are determined, the former is found to be consistent with one for the charged-leptons if the charge factor is taken into account.

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