New Limits on Light Dark Matter-Nucleon Scattering

Autor:	Cox, Peter, Dolan, Matthew J., Wood, Joshua
Rok vydání:	2024
Předmět:	High Energy Physics - Phenomenology
Druh dokumentu:	Working Paper
Popis:	We derive new bounds on hadronically-interacting, sub-GeV mass dark matter. First, we show that one-loop interactions with photons can be sufficient to maintain equilibrium between the dark matter and Standard Model sectors at MeV temperatures, resulting in constraints from Big Bang Nucleosynthesis and the Cosmic Microwave Background. Using chiral perturbation theory, we find that this leads to an upper bound on the dark-matter--nucleon scattering cross-section that is orders of magnitude stronger than existing astrophysical constraints. Furthermore, we compute new bounds from rare Kaon decays and find that these provide even stronger constraints. Our results have implications for future direct detection experiments aiming to search for MeV-scale dark matter. Comment: 11 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2408.12144 Zobrazit plný text záznamu View this record from Arxiv