Constraints on R-parity violating couplings from lepton universality

Abstract

We analyze the one loop corrections to leptonic W and Z decays in an R-parity violating extension to the Minimal Supersymmetric Standard Model (MSSM). We find that lepton universality violation in the Z line-shape variables alone would strengthen the bounds on the magnitudes of the lambda' couplings, but a global fit on all data leaves the bounds virtually unchanged at |lambda'_{33k}| < 0.42 and |lambda'_{23k}| < 0.50 at the 2 sigma level. Bounds from W decays are less stringent: |lambda'_{33k}| < 2.4 at 2 sigma, as a consequence of the weaker Fermilab experimental bounds on lepton universality violation in W decays. We also point out the potential of constraining R-parity violating couplings from the measurement of the Upsilon invisible width.

26pages, 8 postscript figures, REVTeX. Updated references. Typos corrected

References in corpus (12)

• Evidence for oscillation of atmospheric neutrinos
• Constraints on neutrino oscillation parameters from the measurement of day-night solar neutrino fluxes at Super-Kamiokande
• Measurement of the solar neutrino energy spectrum using neutrino-electron scattering
• Bounds on R-parity Violating Couplings at the Weak Scale and at the GUT Scale
• Analytic approach to the complete set of QED corrections to fermion pair production in e+e- annihilation
• R-parity Violation Effects through Soft Supersymmetry Breaking Terms and the Renormalisation Group
• W- and Z-Boson Interactions in Supersymmetric Models with Explicit R-Parity Violation
• QED corrections with partial angular integration to fermion pair production in e+e- - annihilation
• New LEP constraints on some supersymmetric Yukawa interactions that violate R-parity
• Constraints on Topcolor Assisted Technicolor Models from Vertex Corrections
• On the invisible decays of the Upsilon and J/Psi resonances
• Upper Bound on R_b in Two Higgs Doublet Model from Lepton Universality

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• Universal Torsion-Induced Interaction from Large Extra Dimensions
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• Supersymmetry and Electroweak Leptonic Observables
• Running of Oscillation Parameters in Matter with Flavor-Diagonal Non-Standard Interactions of the Neutrino