Influence of Heavy Quark Recombination on the Nucleon Strangeness Asymmetry

Abstract

The nucleon strange and anti-strange distribution asymmetry is an important issue in the study of the nucleon structure. In this work, we show that the heavy quark recombination processes from a perturbative QCD picture can give a sizable influence on the measurement of the nucleon strangeness asymmetry from charged-current charm production processes, such as the CCFR and NuTeV dimuon measurements. When the influence of heavy quark recombination is considered, a positive effective $\delta S_{\mathrm{HR}}^{-}$ should be added to the initially extracted strangeness asymmetry $S^{-}\equiv \int dx[s(x)-\bar{s}(x)]x$, supporting the strangeness asymmetry $S^{-}$ being positive, which is helpful to explain the NuTeV anomaly within the framework of the standard model.

arXiv comment5 latex pages, 2 figures

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Cited by in corpus (9)

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• Extracting the neutron-neutron scattering length -- recent developments
• Statistical uncertainties of a chiral interaction at next-to-next-to leading order
• Nucleon strange $s\bar{s}$ asymmetry to the $\Lambda /\bar{\Lambda }$ fragmentation
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• Quark-antiquark asymmetry of helicity distributions in the nucleon sea
• Study of the $s-\bar{s}$ asymmetry in the proton
• The influence of direct $D$-meson production to the determination on the nucleon strangeness asymmetry via dimuon events in neutrino experiments