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NuTeV anomaly, neutrino mixing, and a heavy Higgs boson

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dc.contributorVirginia Techen
dc.contributor.authorLoinaz, Williamen
dc.contributor.authorOkamura, Naotoshien
dc.contributor.authorTakeuchi, Tatsuen
dc.contributor.authorWijewardhana, L. C. R.en
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.issued2003-04en
dc.description.abstractRecent results from the NuTeV experiment at Fermilab and the deviation of the Z invisible width, measured at CERN LEP and the SLAC Linear Collider, from its standard model (SM) prediction suggest the suppression of neutrino-Z couplings. Such suppressions occur naturally in models which mix the neutrinos with heavy gauge singlet states. We postulate a universal suppression of the Znunu couplings by a factor of (1-epsilon) and perform a fit to the Z-pole and NuTeV observables with epsilon and the oblique correction parameters S and T. Compared to a fit with S and T only, the inclusion of epsilon leads to a dramatic improvement in the quality of the fit. The values of S and T preferred by the fit can be obtained within the SM by a simple increase in the Higgs boson mass. However, if the W mass is also included in the fit, a non-zero U parameter becomes necessary which cannot be supplied within the SM. The preferred value of epsilon suggests that the seesaw mechanism may not be the reason why neutrinos are so light.en
dc.identifier.citationLoinaz, W ; Okamura, N ; Takeuchi, T ; et al., APR 2003. “NuTeV anomaly, neutrino mixing, and a heavy Higgs boson,” PHYSICAL REVIEW D 67(7): 073012. DOI: 10.1103/PhysRevD.67.073012en
dc.identifier.doihttps://doi.org/10.1103/PhysRevD.67.073012en
dc.identifier.issn1550-7998en
dc.identifier.urihttp://hdl.handle.net/10919/24754en
dc.identifier.urlhttp://link.aps.org/doi/10.1103/PhysRevD.67.073012en
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 standard modelen
dc.subjectextraen
dc.subjectdimensionsen
dc.subjectsin(2) theta(w)en
dc.subjectqed correctionsen
dc.subjectmassen
dc.subjectannihilationen
dc.subjectoscillationen
dc.subjectparametersen
dc.subjectcalculateen
dc.subjectAstronomy & Astrophysicsen
dc.subjectPhysicsen
dc.titleNuTeV anomaly, neutrino mixing, and a heavy Higgs bosonen
dc.title.serialPhysical Review Den
dc.typeArticle - Refereeden

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