Weak scale baryogenesis in a supersymmetric scenario with R-parity violation
We investigate the connection between R-parity violation (RPV) in supersymmetric models and Baryogenesis. First we discuss in detail the assumptions of a theorem by Nanopoulos and Weinberg on the CP asymmetry generated from the decay of massive particles. In light of this statement, we analyse some...
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| Main Author: | |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
August 4, 2014
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| In: |
Journal of high energy physics
Year: 2014, Issue: 8 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP08(2014)014 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP08(2014)014 Verlag, lizenzpflichtig, Volltext: https://link.springer.com/article/10.1007%2FJHEP08%282014%29014 
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| Author Notes: | Fabrizio Rompineve |
| Summary: | We investigate the connection between R-parity violation (RPV) in supersymmetric models and Baryogenesis. First we discuss in detail the assumptions of a theorem by Nanopoulos and Weinberg on the CP asymmetry generated from the decay of massive particles. In light of this statement, we analyse some interesting models of Baryogenesis through RPV. We then explore, in the context of RPV SUSY, the possibility to generate the baryon asymmetry through the out-of-equilibrium decay of a metastable Weakly Interacting Massive Particle (WIMP), as proposed in [1]. This setting is also motivated by the observed coincidence between the abundances of dark and baryonic matter. In this framework, we propose two models of out-of-equilibrium decay of a would-be cold relic, and compute the associated CP asymmetry. With a TeV-scale parent, the observed baryon abundance can be reproduced in these models when the stop is in the multi-TeV region. Furthermore, annihilation of the metastable particle into SM states must be characterised by a very weak coupling, g ~ 10−2 and by a heavy mediator mmed ~ 10 TeV. These models can also accommodate stop masses far from the TeV scale, at the expense of weakening the explanation of the ΩB− ΩDM coincidence. |
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| Item Description: | Gesehen am 26.08.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP08(2014)014 |