出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We examine the effect of including the `combined' HERA structure function data in the MSTW global t for parton distribution functions (PDFs). The combined neutral-currentHERA data have a signicant, if not dramatic, effect, of up to 23% at NLO for Z boson and Higgs production at the Tevatron and LHC, and a generally slightly smaller effect, particularly on LHC processes, at NNLO. This is an amount comparable, or less than, the typical PDF uncertainties, and hence we do not intend to release an imminent update to the MSTW 2008 t. We also investigate the consistency with the recent DØ data on electron and muon charge asymmetry fromW decays and the direct CDF measurement of theW charge asymmetry. The DØ lepton charge asymmetry data imply a fairly large change to the down-quark distribution and/or large nuclear corrections to be applied when tting to deuterium structure function data, while the CDF W charge asymmetry data are more consistent with the existing PDFs. However, it is difcult to reconcile all of the TevatronW !`n charge asymmetry data sets with the t, and to some extent, with each other.
