Determination of strange sea distributions from νN deep inelastic scattering

We present all analysis of the nucleon strange sea extracted from a global Parton Distribution Function fit including the neutrino and anti-neutrino dimuon data by the CUR and NuTeV Collaborations, the inclusive charged lepton-nucleon Deep Inelastic Scattering and Drell-Yan data. The (anti-)neutrino induced dimuon analysis is constrained by the semileptonic charmed-hadron branching ratio B-mu = (8.8 +/- 0.5)%, determined from the inclusive charmed hadron measurements performed by the FNAL-E531 and CHORUS neutrino emulsion experiments. Our analysis yields a strange sea suppression factor kappa(20 GeV2) = 0.62 +/- 0.04(exp.) +/- 0.03(QCD), the most precise value available, an x-distribution of total strange sea that is slightly softer than the non-strange sea, and an asymmetry between strange and anti-strange quark distributions consistent with zero (integrated over x it is equal to S-(20 GeV2) = 0.0013 +/- 0.0009(exp.) +/- 0.0002(QCD)). (C) 2009 Elsevier B.V. All rights reserved.