Parity-Violating Electron Scattering as a Probe of Supersymmetry

Abstract

We compute the one-loop supersymmetric (SUSY) contributions to the weak charges of the electron ($Q_W^e$) and proton ($Q_W^p$) using the Minimal Supersymmetric Standard Model (MSSM). These $q^2=0$ vector couplings of the $Z^0$-boson to fermions will be determined in two fixed-target, parity-violating electron scattering experiments. The SUSY loop contributions to $Q_W^p$ and $Q_W^e$ can be substantial, leading to several percent corrections to the Standard Model values for these quantities. We show that the relative signs of the SUSY loop effects on $Q_W^e$ and $Q_W^p$ are correlated and positive over nearly all of the MSSM parameter space, whereas inclusion of R-parity nonconserving interactions can lead to opposite sign relative shifts in the weak charges. Thus, a comparison of $Q_W^p$ and $Q_W^e$ measurements could help distinguish between different SUSY scenarios.

arXiv comment4 pages, 2 figures

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Cited by in corpus (11)

• Low Energy Precision Test of Supersymmetry
• Low Energy Measurements of the Weak Mixing Angle
• The Weak Neutral Current
• The Weak Charge of the Proton and New Physics
• Doubly-Charged Scalars in the Type-II Seesaw Mechanism: Fundamental Symmetry Tests and High-Energy Searches
• Low Energy Probes of Physics Beyond the Standard Model
• Pion Leptonic Decays and Supersymmetry
• Searching for $Z^{\prime }$ bosons at the P2 experiment
• Slepton Discovery in Electroweak Cascade Decay
• Unparticle Searches Through Low Energy Parity Violating Asymmetry
• Future Directions in Parity Violation: From Quarks to the Cosmos