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| Format: | Preprint |
| Veröffentlicht: |
2024
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| Online-Zugang: | https://arxiv.org/abs/2401.09617 |
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| _version_ | 1866916095967887360 |
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| author | Fong, Chee Sheng |
| author_facet | Fong, Chee Sheng |
| contents | Nontrivial topological vacua of non-Abelian gauge symmetry $SU(3)\times SU(2)_{L}$ of the Standard Model play an important role in baryogenesis. In particular, the baryon (and lepton) number violation from $SU(2)_{L}$ sphaleron is a crucial ingredient for baryogenesis at weak scale or higher. In this work, we point out that generically, a baryon asymmetry is induced by an asymmetry generated in the new sector through strong $SU(3)$ and/or weak $SU(2)_{L}$ sphaleron portals and vice versa. In the standard radiation-dominated early Universe, due to phenomenological constraints, the sphaleron portal baryogenesis has to take place at cosmic temperature $T\gtrsim10^{6}-10^{8}$ GeV together with a $(B-L)$-violating source. As an example, we show an explicit model where strong sphaleron portal baryogenesis occurs at the scale of Peccei-Quinn breaking to solve the strong CP problem and this coincides nicely with the scale where the Weinberg operator responsible for Majorana neutrino mass is in equilibrium. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_09617 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Sphaleron portal baryogenesis Fong, Chee Sheng High Energy Physics - Phenomenology Nontrivial topological vacua of non-Abelian gauge symmetry $SU(3)\times SU(2)_{L}$ of the Standard Model play an important role in baryogenesis. In particular, the baryon (and lepton) number violation from $SU(2)_{L}$ sphaleron is a crucial ingredient for baryogenesis at weak scale or higher. In this work, we point out that generically, a baryon asymmetry is induced by an asymmetry generated in the new sector through strong $SU(3)$ and/or weak $SU(2)_{L}$ sphaleron portals and vice versa. In the standard radiation-dominated early Universe, due to phenomenological constraints, the sphaleron portal baryogenesis has to take place at cosmic temperature $T\gtrsim10^{6}-10^{8}$ GeV together with a $(B-L)$-violating source. As an example, we show an explicit model where strong sphaleron portal baryogenesis occurs at the scale of Peccei-Quinn breaking to solve the strong CP problem and this coincides nicely with the scale where the Weinberg operator responsible for Majorana neutrino mass is in equilibrium. |
| title | Sphaleron portal baryogenesis |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2401.09617 |