PoS - Proceedings of Science
Volume 414 - 41st International Conference on High Energy physics (ICHEP2022) - Astroparticle Physics and Cosmology
Bounds on self-interacting dark matter from galactic cores
S. Sarkar
Full text: pdf
Pre-published on: November 20, 2022
Published on: June 15, 2023
Self-interactions between dark matter particles can induce core formation in galaxies and lead to thermalization of their central regions. The strength of self-interactions between dark matter particles is correlated to the size of the thermalized regions. The possibility of placing a conservative limit on the self-interaction cross-section by analyzing the distribution of core radius in isolated galactic haloes is explored in this work. We systematically use dark matter only $N$-body simulations of spherically symmetric isolated haloes incorporating isotropic self-scattering. We report a conservative upper limit on the self-interaction cross-section, $ \sigma/m < $ $ 9.8 $ $\ \rm cm^2 /\rm gm $ at $ 95 \% $ confidence level by comparing the generated distributions with the observed data.
DOI: https://doi.org/10.22323/1.414.0086
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