Revisiting dark matter freeze-in and freeze-out through phase-space distribution
文献类型：期刊论文
| 作者 | Du, Yong; Huang, Fei7; Li, Hao-Lin; Li, Yuan-Zhen; Yu, Jiang-Hao
|
| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2022 |
| 期号 | 4页码:12 |
| ISSN号 | 1475-7516 |
| 关键词 | SEARCH |
| DOI | 10.1088/1475-7516/2022/04/012 |
| 英文摘要 | We revisit dark-matter production through freeze-in and freeze-out by solving the Boltzmann equations at the level of the phase-space distribution f (p, t). Using the 2-+ 2 annihilation and the 1-+ 2 decay processes for illustration, we compare the resulting dark-matter relic abundance with that from the number-density approach. In the transition regime between freeze-in and freeze-out, we find the difference can be quite significant, or even by orders of magnitude if the annihilation of dark-matter particles or the decaying mediator is neglected. The freeze-in production in the 2-+ 2 and the 1-+ 2 processes can also result in non-thermal phase-space distributions, or even multi-modal ones with out-of-equilibrium decay, which can potentially affect structure formation at late times. We also investigate how elastic scatterings can distort such non-thermal distributions. |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27844]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA 2.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China 3.UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China 4.Int Ctr Theoret Phys Asia Pacific, Beijing, Peoples R China 5.Catholic Univ Louvain, Ctr Cosmol Particle Phys & Phenomenol CP3, Chemin Cyclotron 2, B-1348 Louvain La Neuve, Belgium 6.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 7.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Du, Yong,Huang, Fei,Li, Hao-Lin,et al. Revisiting dark matter freeze-in and freeze-out through phase-space distribution[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2022(4):12. |
| APA | Du, Yong,Huang, Fei,Li, Hao-Lin,Li, Yuan-Zhen,&Yu, Jiang-Hao.(2022).Revisiting dark matter freeze-in and freeze-out through phase-space distribution.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(4),12. |
| MLA | Du, Yong,et al."Revisiting dark matter freeze-in and freeze-out through phase-space distribution".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .4(2022):12. |
入库方式： OAI收割
来源：理论物理研究所
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