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arXiv · 2408.10585

Probing Non-Thermal Gravitinos Through Large-Scale Structure Observations

Weiyi Deng·Liyuan Guo·Chengcheng Han·Zhanhong Lei
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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 $m_{\chi_1^0}\lesssim 25~(11)\text{ GeV}$ at $95\%\text{ C.L.}$. Furthermore, this constraint appears to be largely independent of the gravitino mass.

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Weiyi Deng, Liyuan Guo, Chengcheng Han, Zhanhong Lei. 2024-08-20. Probing Non-Thermal Gravitinos Through Large-Scale Structure Observations. https://arxiv.org/abs/2408.10585

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