Early Universe production of $W$ bosons in neutrino decays
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866915804846489600 |
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| author | Fodor, Amalia Dariana Buga, Andru Mihai Crucean, Cosmin |
| author_facet | Fodor, Amalia Dariana Buga, Andru Mihai Crucean, Cosmin |
| contents | In this paper we study, via perturbative methods, the rates of production of $W$ bosons emitted in neutrino decays during the early stages of the Universe. We compute the transition amplitude corresponding to the first order of de Sitter electroweak perturbation theory and study its various limiting cases. The transition rates are derived using minimal subtraction and dimensional regularization. In the end we attempt to obtain the density number of $W$ bosons produced in perturbative transitions in de Sitter spacetime, using the rates obtained in this paper and in previous ones, and analyze the density number with respect to the particle momenta and renormalisation mass $μ$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2505_11544 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Early Universe production of $W$ bosons in neutrino decays Fodor, Amalia Dariana Buga, Andru Mihai Crucean, Cosmin High Energy Physics - Phenomenology High Energy Physics - Theory In this paper we study, via perturbative methods, the rates of production of $W$ bosons emitted in neutrino decays during the early stages of the Universe. We compute the transition amplitude corresponding to the first order of de Sitter electroweak perturbation theory and study its various limiting cases. The transition rates are derived using minimal subtraction and dimensional regularization. In the end we attempt to obtain the density number of $W$ bosons produced in perturbative transitions in de Sitter spacetime, using the rates obtained in this paper and in previous ones, and analyze the density number with respect to the particle momenta and renormalisation mass $μ$. |
| title | Early Universe production of $W$ bosons in neutrino decays |
| topic | High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2505.11544 |