NuTeV anomaly, neutrino mixing, and a heavy Higgs boson
dc.contributor | Virginia Tech | en |
dc.contributor.author | Loinaz, William | en |
dc.contributor.author | Okamura, Naotoshi | en |
dc.contributor.author | Takeuchi, Tatsu | en |
dc.contributor.author | Wijewardhana, L. C. R. | en |
dc.contributor.department | Institute for Particle, Nuclear and Astronomical Sciences (IPNAS) | en |
dc.contributor.department | Physics | en |
dc.date.accessed | 2013-12-16 | en |
dc.date.accessioned | 2013-12-18T19:46:40Z | en |
dc.date.available | 2013-12-18T19:46:40Z | en |
dc.date.issued | 2003-04 | en |
dc.description.abstract | Recent 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.citation | Loinaz, 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.67.073012 | en |
dc.identifier.doi | https://doi.org/10.1103/PhysRevD.67.073012 | en |
dc.identifier.issn | 1550-7998 | en |
dc.identifier.uri | http://hdl.handle.net/10919/24754 | en |
dc.identifier.url | http://link.aps.org/doi/10.1103/PhysRevD.67.073012 | en |
dc.language.iso | en | en |
dc.publisher | American Physical Society | en |
dc.rights | In Copyright | en |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
dc.subject | fermion pair production | en |
dc.subject | supersymmetric standard model | en |
dc.subject | extra | en |
dc.subject | dimensions | en |
dc.subject | sin(2) theta(w) | en |
dc.subject | qed corrections | en |
dc.subject | mass | en |
dc.subject | annihilation | en |
dc.subject | oscillation | en |
dc.subject | parameters | en |
dc.subject | calculate | en |
dc.subject | Astronomy & Astrophysics | en |
dc.subject | Physics | en |
dc.title | NuTeV anomaly, neutrino mixing, and a heavy Higgs boson | en |
dc.title.serial | Physical Review D | en |
dc.type | Article - Refereed | en |
dc.type.dcmitype | Text | en |
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