Reannihilation of self-interacting dark matter
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Tobias Binder | - |
dc.contributor.author | Michael Gustafsson | - |
dc.contributor.author | Ayuki Kamada | - |
dc.contributor.author | Stefan Marinus Rodrigues Sandner | - |
dc.contributor.author | Max Wiesner | - |
dc.date.available | 2018-12-13T10:46:08Z | - |
dc.date.created | 2018-07-23 | - |
dc.date.issued | 2018-06 | - |
dc.identifier.issn | 2470-0010 | - |
dc.identifier.uri | https://pr.ibs.re.kr/handle/8788114/4968 | - |
dc.description.abstract | We explore the phenomenology of having a second epoch of dark matter annihilation into dark radiation long after the standard thermal freeze-out. Such a hidden reannihilation process could affect visible sectors only gravitationally. As a concrete realization we consider self-interacting dark matter (SIDM) with a light force mediator coupled to dark radiation. We demonstrate how resonantly Sommerfeld enhanced cross sections emerge to induce the reannihilation epoch. The effect is a temporally local modification of the Hubble expansion rate, and we show that the cosmic microwave background (CMB) measurements - as well as other observations - have a high sensitivity to observe this phenomenon. Special attention is given to the model region where late kinetic decoupling and strong self-interactions can alleviate several small-scale problems in the cold dark matter paradigm at the same time. Interestingly, we find that reannihilation might here also simultaneously lower the tension between CMB and low-redshift astronomical observations of H0 and σ8. Moreover, we identify reannihilation as a clear signature to discriminate between the phenomenologically otherwise almost identical vector and scalar mediator realizations of SIDM. © 2018 American Physical Society | - |
dc.language | 영어 | - |
dc.publisher | AMER PHYSICAL SOC | - |
dc.title | Reannihilation of self-interacting dark matter | - |
dc.type | Article | - |
dc.type.rims | ART | - |
dc.identifier.wosid | 000435080200001 | - |
dc.identifier.scopusid | 2-s2.0-85049528206 | - |
dc.identifier.rimsid | 64151 | - |
dc.contributor.affiliatedAuthor | Ayuki Kamada | - |
dc.identifier.doi | 10.1103/PhysRevD.97.123004 | - |
dc.identifier.bibliographicCitation | Physical Review d, v.97, no.12, pp.123004 | - |
dc.relation.isPartOf | Physical Review d | - |
dc.citation.title | Physical Review d | - |
dc.citation.volume | 97 | - |
dc.citation.number | 12 | - |
dc.citation.startPage | 123004 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |