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Leptogenesis from Neutralino Decay with Nonholomorphic R-Parity Violation

Thomas Hambye·Ernest Ma·Utpal Sarkar
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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.

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Thomas Hambye, Ernest Ma, Utpal Sarkar. 2000-06-15. Leptogenesis from Neutralino Decay with Nonholomorphic R-Parity Violation. https://doi.org/10.1016/s0550-3213(00)00434-x

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