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Reproductive freeze-in of self-interacting dark matter

Abstract:

We present a mechanism for dark matter (DM) production involving a self-interacting sector that at early times is ultrarelativistic but far underpopulated relative to thermal equilibrium (such initial conditions often arise, e.g., from inflaton decay). Although elastic scatterings can establish kinetic equilibrium we show that for a broad variety of self-interactions full equilibrium is never established despite the DM yield significantly evolving due to 2→k (k>2) processes (the DM carries no...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevD.102.083018

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Institution:
University of Oxford
Role:
Author
Publisher:
American Physical Society Publisher's website
Journal:
Physical Review D Journal website
Volume:
102
Issue:
8
Article number:
83018
Publication date:
2020-10-19
Acceptance date:
2020-09-24
DOI:
EISSN:
1550-2368
ISSN:
1550-7998
Language:
English
Keywords:
Pubs id:
1122530
Local pid:
pubs:1122530
Deposit date:
2021-04-14

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