We propose a new mechanism where a multi-component dark sector generates the observed dark matter abundance and baryon asymmetry and thus addresses the coincidence between the two. The thermal freeze-out of dark matter annihilating into meta-stable dark partners sets the dark matter relic abundance while providing the out-of-equilibrium condition for baryogenesis. The meta-stable state triggers baryon asymmetry production by its decay well after the freeze-out and potentially induces a period of early matter domination before its decay. The dark matter and baryon abundances are related through number conservation within the dark sector (cogenesis). The “coincidence” is a natural outcome with GeV- to TeV-scale symmetric dark matter and the dark sector’s interactions with the Standard Model quarks. We present a UV-complete model and explore its phenomenological predictions, including dark matter direct detection signals, LHC signatures of new massive particles with color charges and long-lived particles with displaced vertices, dark matter-induced nucleon conversions, (exotic) dark matter indirect detection signals, and effects on the cosmological matter power spectrum. As a side result, we provide a novel analytical treatment for dark sector freeze-out, which may prove useful in the study of related scenarios.
{
"_oai": {
"updated": "2022-06-24T00:34:46Z",
"id": "oai:repo.scoap3.org:70944",
"sets": [
"JHEP"
]
},
"authors": [
{
"affiliations": [
{
"country": "Austria",
"value": "Institute of High Energy Physics, Austrian Academy of Sciences, Nikolsdorfergasse 18, Vienna, 1050, Austria",
"organization": "Austrian Academy of Sciences"
}
],
"surname": "Chu",
"email": "xiaoyong.chu@oeaw.ac.at",
"full_name": "Chu, Xiaoyong",
"given_names": "Xiaoyong"
},
{
"affiliations": [
{
"country": "USA",
"value": "Department of Physics and Astronomy, University of California, Riverside, CA, 92521, USA",
"organization": "Department of Physics and Astronomy, University of California"
}
],
"surname": "Cui",
"email": "yanou.cui@ucr.edu",
"full_name": "Cui, Yanou",
"given_names": "Yanou"
},
{
"affiliations": [
{
"country": "Austria",
"value": "Institute of High Energy Physics, Austrian Academy of Sciences, Nikolsdorfergasse 18, Vienna, 1050, Austria",
"organization": "Austrian Academy of Sciences"
}
],
"surname": "Pradler",
"email": "josef.pradler@oeaw.ac.at",
"full_name": "Pradler, Josef",
"given_names": "Josef"
},
{
"affiliations": [
{
"country": "Canada",
"value": "TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, V6T 2A3, Canada",
"organization": "TRIUMF"
}
],
"surname": "Shamma",
"email": "mshamma@triumf.ca",
"full_name": "Shamma, Michael",
"given_names": "Michael"
}
],
"titles": [
{
"source": "Springer",
"title": "Dark freeze-out cogenesis"
}
],
"dois": [
{
"value": "10.1007/JHEP03(2022)031"
}
],
"publication_info": [
{
"page_end": "33",
"journal_title": "Journal of High Energy Physics",
"material": "article",
"journal_volume": "2022",
"artid": "JHEP03(2022)031",
"year": 2022,
"page_start": "1",
"journal_issue": "3"
}
],
"$schema": "http://repo.scoap3.org/schemas/hep.json",
"acquisition_source": {
"date": "2022-06-24T00:31:48.479630",
"source": "Springer",
"method": "Springer",
"submission_number": "c80e071ef35411eca1a1661ec451a4e4"
},
"page_nr": [
33
],
"license": [
{
"url": "https://creativecommons.org/licenses//by/4.0",
"license": "CC-BY-4.0"
}
],
"copyright": [
{
"holder": "The Author(s)",
"year": "2022"
}
],
"control_number": "70944",
"record_creation_date": "2022-06-24T00:31:48.479661",
"_files": [
{
"checksum": "md5:c3672c28615c7b55217282ea97f22124",
"filetype": "xml",
"bucket": "f12dcab4-9a62-4c7f-89d3-1276eb866272",
"version_id": "c1f5036f-4e8c-4941-8c44-9fa07e1d7351",
"key": "10.1007/JHEP03(2022)031.xml",
"size": 13005
},
{
"checksum": "md5:1c74c9a959944f8af9fce77f3cd82059",
"filetype": "pdf/a",
"bucket": "f12dcab4-9a62-4c7f-89d3-1276eb866272",
"version_id": "fb740f9a-fae7-4fbb-bd51-e060cc0368d7",
"key": "10.1007/JHEP03(2022)031_a.pdf",
"size": 1333213
}
],
"collections": [
{
"primary": "Journal of High Energy Physics"
}
],
"arxiv_eprints": [
{
"categories": [
"hep-ph",
"astro-ph.CO"
],
"value": "2112.10784"
}
],
"abstracts": [
{
"source": "Springer",
"value": "We propose a new mechanism where a multi-component dark sector generates the observed dark matter abundance and baryon asymmetry and thus addresses the coincidence between the two. The thermal freeze-out of dark matter annihilating into meta-stable dark partners sets the dark matter relic abundance while providing the out-of-equilibrium condition for baryogenesis. The meta-stable state triggers baryon asymmetry production by its decay well after the freeze-out and potentially induces a period of early matter domination before its decay. The dark matter and baryon abundances are related through number conservation within the dark sector (cogenesis). The \u201ccoincidence\u201d is a natural outcome with GeV- to TeV-scale symmetric dark matter and the dark sector\u2019s interactions with the Standard Model quarks. We present a UV-complete model and explore its phenomenological predictions, including dark matter direct detection signals, LHC signatures of new massive particles with color charges and long-lived particles with displaced vertices, dark matter-induced nucleon conversions, (exotic) dark matter indirect detection signals, and effects on the cosmological matter power spectrum. As a side result, we provide a novel analytical treatment for dark sector freeze-out, which may prove useful in the study of related scenarios."
}
],
"imprints": [
{
"date": "2022-03-07",
"publisher": "Springer"
}
]
}