1. Probing Non-Thermal Gravitinos Through Large-Scale Structure Observations
- Author
-
Deng, Weiyi, Guo, Liyuan, Han, Chengcheng, and Lei, Zhanhong
- Subjects
High Energy Physics - Phenomenology ,Astrophysics - Cosmology and Nongalactic Astrophysics ,General Relativity and Quantum Cosmology - Abstract
We investigate the effects of non-thermally produced dark matter on large-scale structure formation, focusing on the gravitino dark matter. Our analysis shows that large-scale structure measurements from the SDSS LRG data offer a promising approach to probing non-thermally produced gravitinos. Specifically, if gravitinos resulting from neutralino decay constitute a fraction $F_\text{dec}=0.35~(0.1)$ of the dark matter component, the data exclude bino-like neutralino with a mass $m_{\chi_1^0}\lesssim25~(11)\text{ GeV}$. Furthermore, this constraint appears to be largely independent of the gravitino mass., Comment: 7 pages, 3 figures
- Published
- 2024