Speaker
Prof.
Roberto Petti
(University of South Carolina, USA)
Description
We present an analysis of the nucleon strange sea extracted from a
global Parton Distribution Function fit including the neutrino and anti-
neutrino dimuon data by the CCFR 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 semi-
leptonic charmed-hadron branching ratio $B_\mu=(8.8\pm0.5)\%$,
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
$\kappa(20~{\rm GeV}^2)= 0.62\pm0.04({\rm exp.})\pm0.03({\rm QCD})$,
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
$S^-(20~{\rm GeV}^2)=0.0013\pm 0.0009({\rm exp.}) \pm 0.0002({\rm
QCD})$}).
Primary authors
Prof.
Roberto Petti
(University of South Carolina, USA)
Dr
Sergey Alekhin
(IHEP, Russia)
Dr
Sergey Kulagin
(INR, Russia)
