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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| Online Access: | https://arxiv.org/abs/2411.11128 |
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| _version_ | 1866929687547084800 |
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| author | Cado, Yann Englert, Christoph Modak, Tanmoy Quirós, Mariano |
| author_facet | Cado, Yann Englert, Christoph Modak, Tanmoy Quirós, Mariano |
| contents | We investigate the impact of preheating on baryogenesis in $R^2$-Higgs inflation. In this scenario, the inclusion of a dimension-six operator ${(R/ Λ^2)} B_{μν} \widetilde{B}^{μν} $ abundantly generates helical hypermagnetic fields during inflation, leading to a baryon asymmetric Universe at the electroweak crossover. Focusing on the $R^2$-like regime, we first derive the relevant dynamics of preheating using a doubly-covariant formalism. We find that preheating can happen for the Higgs, transverse gauge and Goldstone bosons, however, it is dependent on the value of the non-minimal coupling $ξ_H$ between the Standard Model Higgs field and the Ricci scalar. We identify the preheating temperature to determine the appropriate scale $Λ$ for driving baryogenesis, which is around $Λ\sim 2.2 \, (2.6) \times 10^{-5}\, M_{\rm P}$ for $ξ_H \sim 1 \, (10)$. Our results represent the most accurate estimation of the scale of gravity induced baryogenesis in $R^2$-Higgs inflation to date. Areas for further improvement are identified. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_11128 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Implication of preheating on gravity assisted baryogenesis in $R^2$-Higgs inflation Cado, Yann Englert, Christoph Modak, Tanmoy Quirós, Mariano High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology We investigate the impact of preheating on baryogenesis in $R^2$-Higgs inflation. In this scenario, the inclusion of a dimension-six operator ${(R/ Λ^2)} B_{μν} \widetilde{B}^{μν} $ abundantly generates helical hypermagnetic fields during inflation, leading to a baryon asymmetric Universe at the electroweak crossover. Focusing on the $R^2$-like regime, we first derive the relevant dynamics of preheating using a doubly-covariant formalism. We find that preheating can happen for the Higgs, transverse gauge and Goldstone bosons, however, it is dependent on the value of the non-minimal coupling $ξ_H$ between the Standard Model Higgs field and the Ricci scalar. We identify the preheating temperature to determine the appropriate scale $Λ$ for driving baryogenesis, which is around $Λ\sim 2.2 \, (2.6) \times 10^{-5}\, M_{\rm P}$ for $ξ_H \sim 1 \, (10)$. Our results represent the most accurate estimation of the scale of gravity induced baryogenesis in $R^2$-Higgs inflation to date. Areas for further improvement are identified. |
| title | Implication of preheating on gravity assisted baryogenesis in $R^2$-Higgs inflation |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2411.11128 |