Constraints on R-parity violating couplings from LEP/SLD hadronic observables

1999/11/30 by Oleg Lebedev, Will Loinaz, Tatsu Takeuchi
Physics and Astronomy · #hep-ph

paper · pdf · doi:10.1103/physrevd.62.015003

published as Phys.Rev. D62 (2000) 015003 · 30 pages, 19 postscript figures, REVTeX, new section 8 on Bayesian confidence limits added

arxiv created 2000/01/27 · arxiv updated 2009/11/30

Abstract

We analyze the one loop corrections to hadronic Z decays in an R-parity violating extension to the Minimal Supersymmetric Standard Model (MSSM). Performing a global fit to all the hadronic observables at the Z-peak, we obtain stringent constraints on the R-violating couplings constants lambda' and lambda''. As a result of the strong constraints from the b asymmetry parameters A_b and A_FB(b), we find that the couplings lambda'i31, lambda'i32, and lambda''321 are ruled out at the 1 sigma level, and that lambda'i33 and lambda''33i are ruled out at the 2 sigma level. We also obtain Bayesian confidence limits for the R-violating couplings.

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