The NuTeV Anomaly, Neutrino Mixing, and a Heavy Higgs Boson
| dc.creator | Loinaz, Will | |
| dc.creator | Okamura, Naotoshi | |
| dc.creator | Takeuchi, Tatsu | |
| dc.creator | Wijewardhana, L. C. R. | |
| dc.date | 2002-10-14 | |
| dc.date | 2003-03-20 | |
| dc.date.accessioned | 2026-07-07T03:48:14Z | |
| dc.date.available | 2026-07-07T03:48:14Z | |
| dc.description | Recent results from the NuTeV experiment at Fermilab and the deviation of the Z invisible width, measured at LEP/SLC, 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 Z-nu-nu 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, 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. | |
| dc.description | 19 pages, REVTeX4, 8 postscript figures. Updated references. Typos corrected | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0210193 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0210193 | |
| dc.identifier | Phys.Rev. D67 (2003) 073012 | |
| dc.identifier | doi:10.1103/PhysRevD.67.073012 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/41927 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | The NuTeV Anomaly, Neutrino Mixing, and a Heavy Higgs Boson | |
| dc.type | text |