Constraints on R-parity violating couplings from LEP/SLD hadronic observables
High Energy Physics - Phenomenology
2007-05-23 v2
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.
Cite
@article{arxiv.hep-ph/9911479,
title = {Constraints on R-parity violating couplings from LEP/SLD hadronic observables},
author = {Oleg Lebedev and Will Loinaz and Tatsu Takeuchi},
journal= {arXiv preprint arXiv:hep-ph/9911479},
year = {2007}
}
Comments
30 pages, 19 postscript figures, REVTeX, new section 8 on Bayesian confidence limits added