DW-genesis: baryon number from domain wall network collapse
Abstract Axionic domain walls, as they move through the early universe plasma during their collapse, can generate a net baryon and lepton number through the mechanism of spontaneous baryogenesis, provided that there is a coupling between the axion and the lepton or baryon current. In this paper, we...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-03-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP03(2025)199 |
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| author | Alberto Mariotti Xander Nagels Aäron Rase Miguel Vanvlasselaer |
| author_facet | Alberto Mariotti Xander Nagels Aäron Rase Miguel Vanvlasselaer |
| author_sort | Alberto Mariotti |
| collection | DOAJ |
| description | Abstract Axionic domain walls, as they move through the early universe plasma during their collapse, can generate a net baryon and lepton number through the mechanism of spontaneous baryogenesis, provided that there is a coupling between the axion and the lepton or baryon current. In this paper, we study systematically the baryon asymmetry produced by these domain walls (DWs) at annihilation, within different realisations of the L- or B-violating sector, and refer to this process as DW-genesis. We find that the baryon number is maximised when the DW network collapses approximately at the moment when the L- or B-violating interaction decouples. We study a model of minimal leptogenesis, a model of cogenesis, a model of baryogenesis and finally the possibility that the baryon asymmetry is produced by electroweak sphalerons. As phenomenological consequences of DW-genesis, we discuss the expected gravitational wave signal from the DW network annihilation and the prospects for detecting it. However, we finally emphasize that in realisations of the DW-genesis in minimal post-inflationary scenarios, there is a suppression induced by the cancellation between the asymmetry created by “opposite” axionic domain walls attached to the string. We quantify the impact of this cancellation and discuss possible ways to avoid it. |
| format | Article |
| id | doaj-art-f09a50b63b334636b3d31c45fd66c20f |
| institution | DOAJ |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | SpringerOpen |
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| series | Journal of High Energy Physics |
| spelling | doaj-art-f09a50b63b334636b3d31c45fd66c20f2025-08-20T03:06:48ZengSpringerOpenJournal of High Energy Physics1029-84792025-03-012025316510.1007/JHEP03(2025)199DW-genesis: baryon number from domain wall network collapseAlberto Mariotti0Xander Nagels1Aäron Rase2Miguel Vanvlasselaer3Theoretische Natuurkunde and IIHE/ELEM, Vrije Universiteit Brussel, & The International Solvay InstitutesTheoretische Natuurkunde and IIHE/ELEM, Vrije Universiteit Brussel, & The International Solvay InstitutesTheoretische Natuurkunde and IIHE/ELEM, Vrije Universiteit Brussel, & The International Solvay InstitutesTheoretische Natuurkunde and IIHE/ELEM, Vrije Universiteit Brussel, & The International Solvay InstitutesAbstract Axionic domain walls, as they move through the early universe plasma during their collapse, can generate a net baryon and lepton number through the mechanism of spontaneous baryogenesis, provided that there is a coupling between the axion and the lepton or baryon current. In this paper, we study systematically the baryon asymmetry produced by these domain walls (DWs) at annihilation, within different realisations of the L- or B-violating sector, and refer to this process as DW-genesis. We find that the baryon number is maximised when the DW network collapses approximately at the moment when the L- or B-violating interaction decouples. We study a model of minimal leptogenesis, a model of cogenesis, a model of baryogenesis and finally the possibility that the baryon asymmetry is produced by electroweak sphalerons. As phenomenological consequences of DW-genesis, we discuss the expected gravitational wave signal from the DW network annihilation and the prospects for detecting it. However, we finally emphasize that in realisations of the DW-genesis in minimal post-inflationary scenarios, there is a suppression induced by the cancellation between the asymmetry created by “opposite” axionic domain walls attached to the string. We quantify the impact of this cancellation and discuss possible ways to avoid it.https://doi.org/10.1007/JHEP03(2025)199Axions and ALPsBaryo-and LeptogenesisBaryon/Lepton Number ViolationPhase Transitions in the Early Universe |
| spellingShingle | Alberto Mariotti Xander Nagels Aäron Rase Miguel Vanvlasselaer DW-genesis: baryon number from domain wall network collapse Journal of High Energy Physics Axions and ALPs Baryo-and Leptogenesis Baryon/Lepton Number Violation Phase Transitions in the Early Universe |
| title | DW-genesis: baryon number from domain wall network collapse |
| title_full | DW-genesis: baryon number from domain wall network collapse |
| title_fullStr | DW-genesis: baryon number from domain wall network collapse |
| title_full_unstemmed | DW-genesis: baryon number from domain wall network collapse |
| title_short | DW-genesis: baryon number from domain wall network collapse |
| title_sort | dw genesis baryon number from domain wall network collapse |
| topic | Axions and ALPs Baryo-and Leptogenesis Baryon/Lepton Number Violation Phase Transitions in the Early Universe |
| url | https://doi.org/10.1007/JHEP03(2025)199 |
| work_keys_str_mv | AT albertomariotti dwgenesisbaryonnumberfromdomainwallnetworkcollapse AT xandernagels dwgenesisbaryonnumberfromdomainwallnetworkcollapse AT aaronrase dwgenesisbaryonnumberfromdomainwallnetworkcollapse AT miguelvanvlasselaer dwgenesisbaryonnumberfromdomainwallnetworkcollapse |