Lepton flavor violating Higgs boson decays from massive seesaw neutrinos
| Autor: | Maria J. Herrero, Ana M. Curiel, David Temes, Ernesto Arganda |
|---|---|
| Přispěvatelé: | Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Temes, David |
| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
Physics
Nuclear and High Energy Physics Sterile neutrino Particle physics 010308 nuclear & particles physics High Energy Physics::Phenomenology FOS: Physical sciences Supersymmetry 01 natural sciences [PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph] MAJORANA High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Seesaw molecular geometry [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] 0103 physical sciences Higgs boson High Energy Physics::Experiment Neutrino 010306 general physics Neutrino oscillation Minimal Supersymmetric Standard Model |
| Popis: | Lepton flavor violating Higgs boson decays are studied within the context of seesaw models with Majorana massive neutrinos. Two models are considered: The SM-seesaw, with the Standard Model Particle content plus three right handed neutrinos, and the MSSM-seesaw, with the Minimal Supersymmetric Standard Model particle content plus three right handed neutrinos and their supersymmetric partners. The widths for these decays are derived from a full one-loop diagrammatic computation in both models, and they are analyzed numerically in terms of the seesaw parameters, namely, the Dirac and Majorana mass matrices. Several possible scenarios for these mass matrices that are compatible with neutrino data are considered. In the SM-seesaw case, very small branching ratios are found for all studied scenarios. These ratios are explained as a consequence of the decoupling behaviour of the heavy right handed neutrinos. In contrast, in the MSSM-seesaw case, sizeable branching ratios are found for some of the leptonic flavor violating decays of the MSSM neutral Higgs bosons and for some choices of the seesaw matrices and MSSM parameters. The relevance of the two competing sources of lepton flavor changing interactions in the MSSM-seesaw case is also discussed. The non-decoupling behaviour of the supersymmetric particles contributing in the loop-diagrams is finally shown. 44pgs. Version to appear in Phys.Rev.D |
| Databáze: | OpenAIRE |
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