{"title":"引力电荷成因","authors":"Martin A. Mojahed, Kai Schmitz, Xun-Jie Xu","doi":"arxiv-2409.10605","DOIUrl":null,"url":null,"abstract":"Wash-in leptogenesis is an attractive mechanism to produce the baryon\nasymmetry of the Universe. It treats right-handed-neutrino interactions as\nspectator processes, on the same footing as electroweak sphalerons, that\nreprocess primordial charge asymmetries in the thermal plasma into a\nbaryon-minus-lepton asymmetry. The origin of these primordial charges must be\naccounted for by new $CP$-violating dynamics at very high energies. In this\npaper, we propose such a scenario of chargegenesis that, unlike earlier\nproposals, primarily relies on new interactions in the gravitational sector. We\npoint out that a coupling of a conserved current to the divergence of the Ricci\nscalar during reheating can lead to nonzero effective chemical potentials in\nthe plasma that, together with a suitable charge-violating interaction, can\nresult in the production of a primordial charge asymmetry. Gravitational\nchargegenesis represents a substantial generalization of the idea of\ngravitational baryogenesis. We provide a detailed analysis of a generic and\nminimal realization that is consistent with inflation and show that it can\nsuccessfully explain the baryon asymmetry of the Universe.","PeriodicalId":501339,"journal":{"name":"arXiv - PHYS - High Energy Physics - Theory","volume":"75 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Gravitational chargegenesis\",\"authors\":\"Martin A. Mojahed, Kai Schmitz, Xun-Jie Xu\",\"doi\":\"arxiv-2409.10605\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Wash-in leptogenesis is an attractive mechanism to produce the baryon\\nasymmetry of the Universe. It treats right-handed-neutrino interactions as\\nspectator processes, on the same footing as electroweak sphalerons, that\\nreprocess primordial charge asymmetries in the thermal plasma into a\\nbaryon-minus-lepton asymmetry. The origin of these primordial charges must be\\naccounted for by new $CP$-violating dynamics at very high energies. In this\\npaper, we propose such a scenario of chargegenesis that, unlike earlier\\nproposals, primarily relies on new interactions in the gravitational sector. We\\npoint out that a coupling of a conserved current to the divergence of the Ricci\\nscalar during reheating can lead to nonzero effective chemical potentials in\\nthe plasma that, together with a suitable charge-violating interaction, can\\nresult in the production of a primordial charge asymmetry. Gravitational\\nchargegenesis represents a substantial generalization of the idea of\\ngravitational baryogenesis. We provide a detailed analysis of a generic and\\nminimal realization that is consistent with inflation and show that it can\\nsuccessfully explain the baryon asymmetry of the Universe.\",\"PeriodicalId\":501339,\"journal\":{\"name\":\"arXiv - PHYS - High Energy Physics - Theory\",\"volume\":\"75 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-09-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv - PHYS - High Energy Physics - Theory\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/arxiv-2409.10605\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - High Energy Physics - Theory","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.10605","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Wash-in leptogenesis is an attractive mechanism to produce the baryon
asymmetry of the Universe. It treats right-handed-neutrino interactions as
spectator processes, on the same footing as electroweak sphalerons, that
reprocess primordial charge asymmetries in the thermal plasma into a
baryon-minus-lepton asymmetry. The origin of these primordial charges must be
accounted for by new $CP$-violating dynamics at very high energies. In this
paper, we propose such a scenario of chargegenesis that, unlike earlier
proposals, primarily relies on new interactions in the gravitational sector. We
point out that a coupling of a conserved current to the divergence of the Ricci
scalar during reheating can lead to nonzero effective chemical potentials in
the plasma that, together with a suitable charge-violating interaction, can
result in the production of a primordial charge asymmetry. Gravitational
chargegenesis represents a substantial generalization of the idea of
gravitational baryogenesis. We provide a detailed analysis of a generic and
minimal realization that is consistent with inflation and show that it can
successfully explain the baryon asymmetry of the Universe.