New calculation of collision integrals for cosmological phase transitions
First order phase transitions in the early universe may have left a variety of experimentally accessible imprints. The dynamics of such transitions is governed by the density perturbations caused by the propagation of the bubble wall in the false vacuum plasma, conveniently described by a Boltzmann...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2024-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2024/24/epjconf_qcd@work2024_00031.pdf |
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| _version_ | 1846125782433267712 |
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| author | Branchina Carlo Conaci Angela De Curtis Stefania Delle Rose Luigi Guiggiani Andrea Gil Muyor Ángel Panico Giuliano |
| author_facet | Branchina Carlo Conaci Angela De Curtis Stefania Delle Rose Luigi Guiggiani Andrea Gil Muyor Ángel Panico Giuliano |
| author_sort | Branchina Carlo |
| collection | DOAJ |
| description | First order phase transitions in the early universe may have left a variety of experimentally accessible imprints. The dynamics of such transitions is governed by the density perturbations caused by the propagation of the bubble wall in the false vacuum plasma, conveniently described by a Boltzmann equation. The determination of the bubble wall expansion velocity is crucial to determine the experimental signatures of the transition. We report on the first full (numerical) solution to the Boltzmann equation. Differently from traditional ones, our approach does not rely on any ansatz. The results significantly differ from the ones obtained within the fluid approximation and large differences for the friction acting on the bubble wall are found. The wall velocity is calculated in a singlet extension of the Standard Model, including out-of-equilibrium contributions from both the top quark and the electroweak gauge bosons. |
| format | Article |
| id | doaj-art-a4a41d55b9264f42a2d2ddd027b8f4a0 |
| institution | Kabale University |
| issn | 2100-014X |
| language | English |
| publishDate | 2024-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj-art-a4a41d55b9264f42a2d2ddd027b8f4a02024-12-13T10:02:02ZengEDP SciencesEPJ Web of Conferences2100-014X2024-01-013140003110.1051/epjconf/202431400031epjconf_qcd@work2024_00031New calculation of collision integrals for cosmological phase transitionsBranchina Carlo0Conaci Angela1De Curtis Stefania2Delle Rose Luigi3Guiggiani Andrea4Gil Muyor Ángel5Panico Giuliano6Dipartimento di Fisica, Università della CalabriaDipartimento di Fisica, Università della CalabriaINFN Sezione di Firenze and Dipartimento di Fisica e Astronomia, Università di FirenzeDipartimento di Fisica, Università della CalabriaINFN Sezione di Firenze and Dipartimento di Fisica e Astronomia, Università di FirenzeIFAE and BIST, Universitat Autònoma de BarcelonaINFN Sezione di Firenze and Dipartimento di Fisica e Astronomia, Università di FirenzeFirst order phase transitions in the early universe may have left a variety of experimentally accessible imprints. The dynamics of such transitions is governed by the density perturbations caused by the propagation of the bubble wall in the false vacuum plasma, conveniently described by a Boltzmann equation. The determination of the bubble wall expansion velocity is crucial to determine the experimental signatures of the transition. We report on the first full (numerical) solution to the Boltzmann equation. Differently from traditional ones, our approach does not rely on any ansatz. The results significantly differ from the ones obtained within the fluid approximation and large differences for the friction acting on the bubble wall are found. The wall velocity is calculated in a singlet extension of the Standard Model, including out-of-equilibrium contributions from both the top quark and the electroweak gauge bosons.https://www.epj-conferences.org/articles/epjconf/pdf/2024/24/epjconf_qcd@work2024_00031.pdf |
| spellingShingle | Branchina Carlo Conaci Angela De Curtis Stefania Delle Rose Luigi Guiggiani Andrea Gil Muyor Ángel Panico Giuliano New calculation of collision integrals for cosmological phase transitions EPJ Web of Conferences |
| title | New calculation of collision integrals for cosmological phase transitions |
| title_full | New calculation of collision integrals for cosmological phase transitions |
| title_fullStr | New calculation of collision integrals for cosmological phase transitions |
| title_full_unstemmed | New calculation of collision integrals for cosmological phase transitions |
| title_short | New calculation of collision integrals for cosmological phase transitions |
| title_sort | new calculation of collision integrals for cosmological phase transitions |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2024/24/epjconf_qcd@work2024_00031.pdf |
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