Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 81, Issue 10, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-021-09610-x
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [NRF-2019R1A2C2003738, NRF-2021R1A4A2001897]
- National Research Foundation of Korea
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The study proposes a new mechanism for dark matter self-interaction in the presence of a massive spin-2 mediator, finding that the resulting self-scattering cross section is velocity-dependent. The model is shown to be marginally compatible with perturbative unitarity in the ghost-free realization of the massive spin-2 particle.
We propose a new mechanism for rendering dark matter self-interacting in the presence of a massive spin-2 mediator. The derived Yukawa-type potential for dark matter is independent of the spins of dark matter in the leading order of the momentum expansion, so are the resulting non-perturbative effects for the dark matter self-scattering. We find that both the Born cross section and relatively mild resonance effects assist to make the self-scattering cross section velocity-dependent. We discuss how to evade the current indirect bounds on dark matter annihilations and show that the model is marginally compatible with perturbative unitarity in the ghost-free realization of the massive spin-2 particle.
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