Supersymmetric Contributions to Weak Decay Correlation Coefficients

Abstract

We study supersymmetric contributions to correlation coefficients that characterize the spectral shape and angular distribution for polarized muon- and beta-decays. In the minimal supersymmetric Standard Model (MSSM), one-loop box graphs containing superpartners can give rise to non-(V-A)x(V-A) four fermion operators in the presence of left-right or flavor mixing between sfermions. We analyze the present phenomenological constraints on such mixing and determine the range of allowed contributions to the weak decay correlation coefficients. We discuss the prospective implications for future muon- and beta-decay experiments, and argue that they may provide unique probes of left-right mixing in the first generation scalar fermion sector.

Revised version - to appear in Phys.Rev.D

References in corpus (4)

• Tests of the standard electroweak model in beta decay
• Neutrino mass constraints on beta decay
• Neutrino Mass Implications for Muon Decay Parameters
• Probing the Fundamental Symmetries of the Early Universe: The Low Energy Frontier

Cited by in corpus (5)

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• Low Energy Precision Test of Supersymmetry
• Standard Model tests with trapped radioactive atoms
• Tensor interaction constraints from beta decay recoil spin asymmetry of trapped atoms
• A Precision Measurement of the Muon Decay Parameters $\rho$ and $\delta$