Constraints on R-parity violating couplings from CERN LEP and SLAG SLD hadronic observables

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dc.contributorVirginia Techen
dc.contributor.authorLebedev, O.en
dc.contributor.authorLoinaz, Williamen
dc.contributor.authorTakeuchi, Tatsuen
dc.contributor.departmentInstitute for Particle, Nuclear and Astronomical Sciences (IPNAS)en
dc.contributor.departmentPhysicsen
dc.date.accessed2013-12-16en
dc.date.accessioned2013-12-18T19:46:40Zen
dc.date.available2013-12-18T19:46:40Zen
dc.date.issued2000-07-01en
dc.description.abstractWe analyze the one loop corrections to hadronic Z decays in an R-parity violating extension to the minimal supersymmetric standard model. Performing a global fit to all the hadronic observables at the Z peak, we obtain stringent constraints on the R-violating coupling constants lambda' and lambda". The presence of these couplings worsens the agreement with the data relative to the standard model. The strongest constraints come from the b asymmetry parameters A(b) and A(FB)(b) From a classical statistical analysis we find that the couplings lambda'(131), lambda'(132), and lambda"(321) are ruled out at the 1 sigma level, and that lambda'(133) and lambda"(33i) are ruled out at the 2 sigma level. A Bayesian statistical analysis weakens the bounds, but the corresponding chi(2)'s are uncomfortably large, rendering the relevance of the Bayesian bounds suspect.en
dc.identifier.citationLebedev, O ; Loinaz, W ; Takeuchi, T, JUL 1 2000. “Constraints on R-parity violating couplings from CERN LEP and SLAG SLD hadronic observables,” PHYSICAL REVIEW D 62(1): 015003. DOI: 10.1103/PhysRevD.62.015003en
dc.identifier.doihttps://doi.org/10.1103/PhysRevD.62.015003en
dc.identifier.issn0556-2821en
dc.identifier.urihttp://hdl.handle.net/10919/24749en
dc.identifier.urlhttp://link.aps.org/doi/10.1103/PhysRevD.62.015003en
dc.language.isoen_USen
dc.publisherAmerican Physical Societyen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectfermion pair productionen
dc.subjectsupersymmetric modelsen
dc.subjectqed correctionsen
dc.subjectoscillationen
dc.subjectresonanceen
dc.subjectboundsen
dc.subjectAstronomy & Astrophysicsen
dc.subjectPhysicsen
dc.titleConstraints on R-parity violating couplings from CERN LEP and SLAG SLD hadronic observablesen
dc.title.serialPhysical Review Den
dc.typeArticle - Refereeden

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