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Leptogenesis from Neutralino Decay with Nonholomorphic R-Parity Violation | | Thomas Hambye
; Ernest Ma
; Utpal Sarkar
; | | Date: |
15 Jun 2000 | | Journal: | Nucl.Phys. B590 (2000) 429-452 | | Subject: | hep-ph | | Affiliation: | Frascati), Ernest Ma (UC, Riverside) and Utpal Sarkar (Phys. Res. Lab., Ahmedabad & UC, Riverside | | Abstract: | In supersymmetric models with lepton-number violation, hence also R-parity violation, it is easy to have realistic neutrino masses, but then leptogenesis becomes difficult to achieve. After explaining the general problems involved, we study the details of a model which escapes these constraints and generates a lepton asymmetry, which gets converted into the present observed baryon asymmetry of the Universe through the electroweak sphalerons. This model requires the presence of certain nonholomorphic R-parity violating terms. For completeness we also present the most general R-parity violating Lagrangian with soft nonholomorphic terms and study their consequences for the charged-scalar mass matrix. New contributions to neutrino masses in this scenario are discussed. | | Source: | arXiv, hep-ph/0006173 | | Services: | Forum | Review | PDF | Favorites | |
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