PoS - Proceedings of Science
Volume 449 - The European Physical Society Conference on High Energy Physics (EPS-HEP2023) - T03 Dark Matter
Center-of-mass recoil effects on the annihilation and formation of dark matter bound pairs
G. Qerimi*, S. Biondini, N. Brambilla and A. Vairo
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Pre-published on: February 09, 2024
Published on: March 21, 2024
For a quantitative investigation on the time evolution of heavy thermal dark matter at and after thermal freeze-out, near-threshold processes need to be taken into account which have a large impact on the observed dark matter relic abundance. In this conference paper, we study the recoil effect of heavy dark matter pairs in a thermal bath and compute the annihilation cross section and the decay width as well as the bound-state formation cross section of dark matter fermion-antifermion pairs in the laboratory frame within the framework of potential non-relativistic effective field theories at finite temperature. For the considered hierarchy of energy scales, we highlight the effect of the recoil corrections to the thermal rates.
DOI: https://doi.org/10.22323/1.449.0112
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