Cosmological collider signals of modular spontaneous CP breaking
Fuente:
arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866913009759158272 |
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| author | Aoki, Shuntaro Strumia, Alessandro |
| author_facet | Aoki, Shuntaro Strumia, Alessandro |
| contents | We consider a modular-invariant extension of the Standard Model. Assuming that the modulus is the inflaton, the CP-violating phases of the Yukawa couplings evolve during inflation. This dynamics favours a Higgs condensate, so that Standard Model fermions mediate a one-loop cosmological collider signal enhanced by chemical potentials. Next-generation experiments can probe sub-Planckian values of the modulus decay constant. We provide precise expressions for Dirac fermions with chemical potentials in de Sitter. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_05548 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Cosmological collider signals of modular spontaneous CP breaking Aoki, Shuntaro Strumia, Alessandro High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Physics - Theory We consider a modular-invariant extension of the Standard Model. Assuming that the modulus is the inflaton, the CP-violating phases of the Yukawa couplings evolve during inflation. This dynamics favours a Higgs condensate, so that Standard Model fermions mediate a one-loop cosmological collider signal enhanced by chemical potentials. Next-generation experiments can probe sub-Planckian values of the modulus decay constant. We provide precise expressions for Dirac fermions with chemical potentials in de Sitter. |
| title | Cosmological collider signals of modular spontaneous CP breaking |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Physics - Theory |
| url | https://arxiv.org/abs/2604.05548 |