Muonium-antimuonium oscillations in an extended minimal supersymmetric standard model with right-handed neutrinos
- Department of Physics, Purdue University, West Lafayette, Indiana 47906 (United States)
The electron and muon number violating muonium-antimuonium oscillation process in an extended minimal supersymmetric standard model is investigated. The minimal supersymmetric standard model is modified by the inclusion of three right-handed neutrino superfields. While the model allows the neutrino mass terms to mix among the different generations, the sneutrino and slepton mass terms have only intragenerational lepton number violation and not intergenerational lepton number mixing. Thus, the muonium-antimuonium conversion can then be used to constrain those model parameters, which avoid further constraints from the {mu}{yields}e{gamma} decay bounds. For a wide range of parameter values, the contributions to the muonium-antimuonium oscillation time scale are at least 2 orders of magnitude below the sensitivity of current experiments. However, if the ratio of the two Higgs field vacuum expectation values, tan{beta}, is very small, there is a limited possibility that the contributions are large enough for the present experimental limit to provide an inequality relating tan{beta} to the light neutrino mass scale m{sub {nu}}, which is generated by the seesaw mechanism. The resultant lower bound on tan{beta} as a function of m{sub {nu}} is more stringent than the analogous bounds arising from the muon and electron anomalous magnetic moments as computed using this model.
- OSTI ID:
- 21254729
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 79, Issue 1; Other Information: DOI: 10.1103/PhysRevD.79.015001; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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