Gravitationally induced particle production and its impact on the WIMP abundance
A large set of independent astronomical observations have provided a strong evidence for nonbaryonic dark matter in the Universe. One of the most investigated candidates is an unknown long-lived Weakly Interacting Massive Particle (WIMP) which was in thermal equilibrium with the primeval plasma. Her...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2015-12-01
|
| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269315008138 |
| _version_ | 1830298625907884032 |
|---|---|
| author | I. Baranov J.A.S. Lima |
| author_facet | I. Baranov J.A.S. Lima |
| author_sort | I. Baranov |
| collection | DOAJ |
| description | A large set of independent astronomical observations have provided a strong evidence for nonbaryonic dark matter in the Universe. One of the most investigated candidates is an unknown long-lived Weakly Interacting Massive Particle (WIMP) which was in thermal equilibrium with the primeval plasma. Here we investigate the WIMP abundance based on the relativistic kinetic treatment for gravitationally induced particle production recently proposed in the literature (Lima and Baranov, 2014) [16]. The new evolution equation is deduced and solved both numerically and through a semi-analytical approach. The predictions of the WIMP observables are discussed and compared with the ones obtained in the standard approach. |
| first_indexed | 2024-12-19T07:53:35Z |
| format | Article |
| id | doaj.art-36521e69c4aa49b6b246b019b502c269 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-12-19T07:53:35Z |
| publishDate | 2015-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-36521e69c4aa49b6b246b019b502c2692022-12-21T20:30:03ZengElsevierPhysics Letters B0370-26931873-24452015-12-01751C33834210.1016/j.physletb.2015.10.054Gravitationally induced particle production and its impact on the WIMP abundanceI. Baranov0J.A.S. Lima1Departamento de Física Geral, Universidade de São Paulo, 05508-090 São Paulo, SP, BrazilDepartamento de Astronomia, Universidade de São Paulo, 05508-900 São Paulo, SP, BrazilA large set of independent astronomical observations have provided a strong evidence for nonbaryonic dark matter in the Universe. One of the most investigated candidates is an unknown long-lived Weakly Interacting Massive Particle (WIMP) which was in thermal equilibrium with the primeval plasma. Here we investigate the WIMP abundance based on the relativistic kinetic treatment for gravitationally induced particle production recently proposed in the literature (Lima and Baranov, 2014) [16]. The new evolution equation is deduced and solved both numerically and through a semi-analytical approach. The predictions of the WIMP observables are discussed and compared with the ones obtained in the standard approach.http://www.sciencedirect.com/science/article/pii/S0370269315008138CosmologyDark energyThermodynamics |
| spellingShingle | I. Baranov J.A.S. Lima Gravitationally induced particle production and its impact on the WIMP abundance Physics Letters B Cosmology Dark energy Thermodynamics |
| title | Gravitationally induced particle production and its impact on the WIMP abundance |
| title_full | Gravitationally induced particle production and its impact on the WIMP abundance |
| title_fullStr | Gravitationally induced particle production and its impact on the WIMP abundance |
| title_full_unstemmed | Gravitationally induced particle production and its impact on the WIMP abundance |
| title_short | Gravitationally induced particle production and its impact on the WIMP abundance |
| title_sort | gravitationally induced particle production and its impact on the wimp abundance |
| topic | Cosmology Dark energy Thermodynamics |
| url | http://www.sciencedirect.com/science/article/pii/S0370269315008138 |
| work_keys_str_mv | AT ibaranov gravitationallyinducedparticleproductionanditsimpactonthewimpabundance AT jaslima gravitationallyinducedparticleproductionanditsimpactonthewimpabundance |