Neutrino dimuon production and the dynamical determination of strange parton distributions

TL;DR

This paper investigates the strange quark content of the nucleon using recent neutrino dimuon data, confirming the validity of dynamical parton distribution models and revealing a small positive strange sea asymmetry.

Contribution

It demonstrates that dynamical parton distributions, starting from zero strange input, accurately predict neutrino dimuon data and reveal a small positive strange sea asymmetry.

Findings

Data agree with dynamical GJR08 predictions

Strange sea asymmetry is small and positive

Supports radiative generation of parton distributions

Abstract

Utilizing recent neutrino dimuon production measurement from NuTeV the assumptions on the determination of the strangeness content of the nucleon within the dynamical approach to parton distributions are investigated. The data are found to be in good agreement with the predictions derived from our (GJR08) dynamical parton distributions, which have been generated entirely radiatively starting from vanishing strange input distributions at an optimally chosen low resolution scale. Further, the data induce an asymmetry in the strange sea which is found to be small and positive in agreement with previous results.