Effective theory for self-interacting dark matter and massive spin-2 mediators

Autor:	Kang, Yoo-Jin, Lee, Hyun Min
Rok vydání:	2020
Předmět:	High Energy Physics - Phenomenology Astrophysics - Astrophysics of Galaxies High Energy Physics - Theory
Druh dokumentu:	Working Paper
DOI:	10.1088/1361-6471/abe529
Popis:	We consider the effective theory for self-interacting dark matter with arbitrary spin and go beyond the previous discussion in the literature by introducing a massive spin-2 particle as the mediator for the dark matter self-scattering. We present the effective self-interactions for dark matter in the leading order expansions with the momentum transfer and the dark matter velocity. We compare between the Born cross section and the non-perturbative cross section in the leading order approximation of the effective Yukawa interaction. As a result, we find that there is a wide range of dark matter and spin-2 particle masses for a velocity-dependent self-scattering to solve small-scale problems at galaxies as well as satisfy the bounds from galaxy clusters at the same time. Comment: 35 pages, 3 figures, published version
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2003.09290 Zobrazit plný text záznamu View this record from Arxiv