We propose simple scenarios where lepton flavor-violating couplings generate the observed dark matter abundance through freeze-in of an axion-like particle with mass in the few keV range. Compared to flavor-diagonal freeze-in, this mechanism enhances dark matter stability, softens stellar cooling constraints and improves the experimental sensitivity of accelerator-based searches. These scenarios can be tested by future X-ray telescopes, and in some cases will be almost entirely probed by new searches for lepton flavor violation at high-intensity experiments such as Mu3e and MEG II.
{
"license": [
{
"url": "http://creativecommons.org/licenses/by/3.0/",
"license": "CC-BY-3.0"
}
],
"copyright": [
{
"holder": "The Author(s)",
"statement": "The Author(s)",
"year": "2023"
}
],
"control_number": "77075",
"_oai": {
"updated": "2023-05-25T09:31:01Z",
"id": "oai:repo.scoap3.org:77075",
"sets": [
"PLB"
]
},
"authors": [
{
"affiliations": [
{
"country": "Italy",
"value": "Dipartimento di Fisica E. Fermi, Universit\u00e0 di Pisa, Pisa, Italy"
},
{
"country": "Italy",
"value": "INFN, Sezione di Pisa, Pisa, Italy"
}
],
"surname": "Panci",
"given_names": "Paolo",
"full_name": "Panci, Paolo"
},
{
"affiliations": [
{
"country": "Italy",
"value": "INFN, Sezione di Firenze, Sesto Fiorentino, Italy"
}
],
"surname": "Redigolo",
"given_names": "Diego",
"full_name": "Redigolo, Diego"
},
{
"affiliations": [
{
"country": "Germany",
"value": "Institut f\u00fcr Astroteilchenphysik, Karlsruhe Institute of Technology, Karlsruhe, Germany"
}
],
"surname": "Schwetz",
"given_names": "Thomas",
"full_name": "Schwetz, Thomas"
},
{
"surname": "Ziegler",
"given_names": "Robert",
"affiliations": [
{
"country": "Germany",
"value": "Institut f\u00fcr Theoretische Teilchenphysik, Karlsruhe Institute of Technology, Karlsruhe, Germany"
}
],
"full_name": "Ziegler, Robert",
"orcid": "0000-0003-2653-7327",
"email": "robert.ziegler@kit.edu"
}
],
"_files": [
{
"checksum": "md5:fefce84b6c74640ee2b67173453a6ca5",
"filetype": "xml",
"bucket": "a59034d4-7485-4def-ace5-e835b8aaf093",
"version_id": "17d0cbeb-1b12-4d42-ae6e-cd7bc0225ee6",
"key": "10.1016/j.physletb.2023.137919.xml",
"size": 232459
},
{
"checksum": "md5:650f55a81815a05e433240117959ee8b",
"filetype": "pdf",
"bucket": "a59034d4-7485-4def-ace5-e835b8aaf093",
"version_id": "ea20bd25-7213-455b-bb14-4ac31d634c57",
"key": "10.1016/j.physletb.2023.137919.pdf",
"size": 719688
},
{
"checksum": "md5:700ab17349086c1de3233a06e96a4533",
"filetype": "pdf/a",
"bucket": "a59034d4-7485-4def-ace5-e835b8aaf093",
"version_id": "58f0f69d-c664-42ed-9ca3-0f7cfadf59b4",
"key": "10.1016/j.physletb.2023.137919_a.pdf",
"size": 729756
}
],
"record_creation_date": "2023-04-18T12:30:38.226515",
"titles": [
{
"source": "Elsevier",
"title": "Axion dark matter from lepton flavor-violating decays"
}
],
"collections": [
{
"primary": "Physics Letters B"
}
],
"dois": [
{
"value": "10.1016/j.physletb.2023.137919"
}
],
"publication_info": [
{
"journal_volume": "841 C",
"journal_title": "Physics Letters B",
"material": "article",
"artid": "137919",
"year": 2023
}
],
"$schema": "http://repo.scoap3.org/schemas/hep.json",
"abstracts": [
{
"source": "Elsevier",
"value": "We propose simple scenarios where lepton flavor-violating couplings generate the observed dark matter abundance through freeze-in of an axion-like particle with mass in the few keV range. Compared to flavor-diagonal freeze-in, this mechanism enhances dark matter stability, softens stellar cooling constraints and improves the experimental sensitivity of accelerator-based searches. These scenarios can be tested by future X-ray telescopes, and in some cases will be almost entirely probed by new searches for lepton flavor violation at high-intensity experiments such as Mu3e and MEG II."
}
],
"imprints": [
{
"date": "2023-05-25",
"publisher": "Elsevier"
}
],
"acquisition_source": {
"date": "2023-05-25T09:30:43.837626",
"source": "Elsevier",
"method": "Elsevier",
"submission_number": "b85cf48cfade11ed80743e7708eaa62a"
}
}