Coscattering in next-to-minimal dark matter and split supersymmetry
Abstract In some models of thermal relic dark matter, the relic abundance may be set by inelastic scattering processes (rather than annihilations) becoming inefficient as the universe cools down. This effect has been called coscattering. We present a procedure to numerically solve the full momentum-...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2020-01-01
|
| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP01(2020)113 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832586152663580672 |
|---|---|
| author | F. Brümmer |
| author_facet | F. Brümmer |
| author_sort | F. Brümmer |
| collection | DOAJ |
| description | Abstract In some models of thermal relic dark matter, the relic abundance may be set by inelastic scattering processes (rather than annihilations) becoming inefficient as the universe cools down. This effect has been called coscattering. We present a procedure to numerically solve the full momentum-dependent Boltzmann equations in coscattering, which allows for a precise calculation of the dark matter relic density including the effects of early kinetic decoupling. We apply our method to a simple model, containing a fermionic SU(2) triplet and a fermionic singlet with electroweak-scale masses, at small triplet-singlet mixing. The relic density can be set by either coannihilation or, at values of the mixing angle θ ≲ 10−5, by coscattering. We identify the parameter ranges which give rise to the observed relic abundance. As a special case, we study bino-like dark matter in split supersymmetry at large μ. |
| format | Article |
| id | doaj-art-b7a6b49364ce475987e95122e9f5a564 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-b7a6b49364ce475987e95122e9f5a5642025-01-26T12:11:12ZengSpringerOpenJournal of High Energy Physics1029-84792020-01-012020112010.1007/JHEP01(2020)113Coscattering in next-to-minimal dark matter and split supersymmetryF. Brümmer0LUPM, UMR5299, Université de Montpellier and CNRSAbstract In some models of thermal relic dark matter, the relic abundance may be set by inelastic scattering processes (rather than annihilations) becoming inefficient as the universe cools down. This effect has been called coscattering. We present a procedure to numerically solve the full momentum-dependent Boltzmann equations in coscattering, which allows for a precise calculation of the dark matter relic density including the effects of early kinetic decoupling. We apply our method to a simple model, containing a fermionic SU(2) triplet and a fermionic singlet with electroweak-scale masses, at small triplet-singlet mixing. The relic density can be set by either coannihilation or, at values of the mixing angle θ ≲ 10−5, by coscattering. We identify the parameter ranges which give rise to the observed relic abundance. As a special case, we study bino-like dark matter in split supersymmetry at large μ.https://doi.org/10.1007/JHEP01(2020)113Cosmology of Theories beyond the SMSupersymmetric Standard Model |
| spellingShingle | F. Brümmer Coscattering in next-to-minimal dark matter and split supersymmetry Journal of High Energy Physics Cosmology of Theories beyond the SM Supersymmetric Standard Model |
| title | Coscattering in next-to-minimal dark matter and split supersymmetry |
| title_full | Coscattering in next-to-minimal dark matter and split supersymmetry |
| title_fullStr | Coscattering in next-to-minimal dark matter and split supersymmetry |
| title_full_unstemmed | Coscattering in next-to-minimal dark matter and split supersymmetry |
| title_short | Coscattering in next-to-minimal dark matter and split supersymmetry |
| title_sort | coscattering in next to minimal dark matter and split supersymmetry |
| topic | Cosmology of Theories beyond the SM Supersymmetric Standard Model |
| url | https://doi.org/10.1007/JHEP01(2020)113 |
| work_keys_str_mv | AT fbrummer coscatteringinnexttominimaldarkmatterandsplitsupersymmetry |