Quantum effects on Higgs-boson production and decay due to Majorana neutrinos
Abstract
We analyze the phenomenological implications for new electroweak physics in the Higgs sector in the framework of SU(2) L ⊗ U (1) Y theories that naturally predict heavy Majorana neutrinos. We calculate the one-loop Majorana-neutrino contributions to the decay rates of the Higgs boson into pairs of quarks and intermediate bosons and to its production cross section via bremsstrahlung in e+e- collisions. It turns out that these are extremely small in three-generation models. On the other hand, the sizeable quantum corrections generated by a conventional fourth generation with a Dirac neutrino may be screened considerably in the presence of a Majorana degree of freedom.
- Publication:
-
Nuclear Physics B
- Pub Date:
- August 1994
- DOI:
- 10.1016/0550-3213(94)90086-8
- arXiv:
- arXiv:hep-ph/9402314
- Bibcode:
- 1994NuPhB.424...18K
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 27 p. (10 figs. available upon request), LaTeX, ISSN 0418-9833, DESY 94-020, RAL/94-021