Annihilating leptogenesis |
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Authors: | Pei-Hong Gu Utpal Sarkar |
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Institution: | 1. The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34014 Trieste, Italy;2. Physical Research Laboratory, Ahmedabad 380009, India;3. Department of Physics and McDonnell Center for the Space Sciences, Washington University, St. Louis, MO 63130, USA |
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Abstract: | Leptogenesis is usually realized through decays of heavy particles. In this Letter we consider another possibility of generating a lepton asymmetry through annihilations of heavy particles. We demonstrate our idea with a realistic extension of the standard model containing a heavy doublet and a light singlet scalars in addition to right-handed neutrinos and Higgs triplets required for type-I + II seesaw of neutrino masses. We also clarify that this annihilating leptogenesis scenario can be naturally embedded in more fundamental theories, like left–right symmetric models or grand unified theories. |
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Keywords: | 98 80 Cq 14 60 Pq 12 60 Fr |
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