Strange quark asymmetry in the nucleon and the NuTeV anomaly

Abstract

The NuTeV anomaly of a non-universal value of the fundamental parameter sin^2θ_W in the electroweak theory has been interpreted as an indication for new physics beyond the Standard Model. However, the observed quantity depends on a possible asymmetry in the momentum distributions of strange quarks and antiquarks in the nucleon. This asymmetry occurs naturally in a phenomenologically successful physical model for such parton distributions, which reduces the NuTeV result to only about two standard deviations from the Standard Model.

4 pages, 5 figures, RevTex4. Updated with new references and extended discussion. v.3: Minor corrections made

References in corpus (3)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Perturbative generation of a strange-quark asymmetry in the nucleon
• Contribution of asymmetric strange-antistrange sea to the Paschos-Wolfenstein relation

Cited by in corpus (26)

• Low Energy Precision Test of Supersymmetry
• The $s\bar{s}$ component of the proton and the strangeness magnetic moment
• Parton momentum and helicity distributions in the nucleon
• Flavor Structure of the Nucleon Sea
• Electroweak higher-order effects and theoretical uncertainties in deep-inelastic neutrino scattering
• Pion momentum distributions in the nucleon in chiral effective theory
• Moments of Nucleon's Parton Distribution for the Sea and Valence Quarks from Lattice QCD
• Nucleon sea in the effective chiral quark model
• Flavor decomposition of the nucleon unpolarized, helicity and transversity parton distribution functions from lattice QCD simulations
• Radiatively Generated Isospin Violations in the Nucleon and the NuTeV Anomaly
• Nonperturbative strange-quark sea from lattice QCD, light-front holography, and meson-baryon fluctuation models
• Strange quark asymmetry in the proton in chiral effective theory
• Quark asymmetries in the proton from a model for parton densities
• Constraints on $s-\bar{s}$ asymmetry of the proton in chiral effective theory
• Flavor structure of the unpolarized and longitudinally-polarized sea-quark distributions in the nucleon
• Perturbative and nonperturbative contributions to the strange quark asymmetry in the nucleon
• Influence of Heavy Quark Recombination on the Nucleon Strangeness Asymmetry
• Nucleon strange $s\bar{s}$ asymmetry to the $\Lambda /\bar{\Lambda }$ fragmentation
• Probing nucleon strange asymmetry from charm production in neutrino deep inelastic scattering
• The s-s(bar) asymmetry in nucleon and "NuTeV anomaly"
• Strange quark-antiquark asymmetry of nucleon sea from $\Lambda /\bar{\Lambda }$ polarization
• The leading particle effect from light quark fragmentation in charm hadroproduction
• Effect due to charge symmetry violation on the Paschos-Wolfenstein relation
• Octet and decuplet contribution to the proton self energy
• The influence of direct $D$-meson production to the determination on the nucleon strangeness asymmetry via dimuon events in neutrino experiments
• Nucleon parton distributions from hadronic quantum fluctuations