Supersymmetric Effects in Deep Inelastic Neutrino-Nucleus Scattering

Abstract

We compute the supersymmetric (SUSY) contributions to neutrino (antineutrino)-nucleus deep inelastic scattering in the Minimal Supersymmetric Standard Model (MSSM). We consider the ratio of neutral current to charged current cross sections, $R_{\nu }$ and $R_{\bar{\nu }}$, and compare with the deviations of these quantities from the Standard Model predictions implied by the recent NuTeV measurement. After performing a model-independent analysis, we find that SUSY loop corrections generally have the opposite sign from the NuTeV anomaly. We discuss one scenario in which a right-sign effect arises, and show that it is ruled out by other precision data. We also study for R parity-violating (RPV) contributions. Although RPV effects could, in principle, reproduce the NuTeV anomaly, such a possibility is also ruled out by other precision electroweak measurements.

30 pages, 13 figures

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• Low Energy Precision Test of Supersymmetry
• The Weak Neutral Current
• The Weak Charge of the Proton and New Physics
• The MSSM confronts the precision electroweak data and the muon g-2
• Reassessment of the NuTeV determination of the Weinberg angle
• Electroweak higher-order effects and theoretical uncertainties in deep-inelastic neutrino scattering
• The Top Priority: Precision Electroweak Physics from Low to High Energy
• Nuclear modification difference between u_v and d_v distributions and its relation to NuTeV sin^2 theta_W anomaly
• Effects of nuclear medium and nonisoscalarity in extracting $si{n}^2{\theta }_W$ using Paschos-Wolfenstein relation
• Isospin Symmetry Breaking in the Chiral Quark Model
• The Paschos-Wolfenstein relation in a hadronic picture