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

Article
Report number	arXiv:2003.09290
Title	Effective theory for self-interacting dark matter and massive spin-2 mediators
Author(s)	Kang, Yoo-Jin (Chung-Ang U. ; CERN) ; Lee, Hyun Min (Chung-Ang U. ; CERN)
Publication	2021-03-24
Imprint	2020-03-20
Number of pages	31
Note	35 pages, 3 figures, published version
In:	J. Phys. G 48 (2021) 045002
DOI	10.1088/1361-6471/abe529
Subject category	hep-th ; Particle Physics - Theory ; astro-ph.GA ; Astrophysics and Astronomy ; hep-ph ; Particle Physics - Phenomenology
Abstract	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.
Copyright/License	preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2021-2024 IOP Publishing Ltd

$Top: Contours of the DM self-scattering cross section divided by the DM mass at dwarf galaxies with $v_{\rm dwarf}=10^{-4} c$ in the parameter space for $m_G$ vs $m_{\rm DM}$. We took $\sigma_T/m_{\rm DM}=0.1,10\,{\rm cm^2/g}$. The orange dashed and solid lines are the results for the Born cross section, whereas the purple and blue lines are those for the non-perturbative cross section. Middle (Bottom): The DM self-scattering cross section divided by the DM mass as a function of the DM velocity for $m_{\rm DM}v_{\rm dwarf}/m_G=0.0185$ and two fixed DM masses in each plot. Dashed and solid lines are for the Born and non-perturbative cross sections, respectively. $A_{\rm DM}=1$ is chosen for all the plots and DM spins are taken to $s=0,1/2,1$ from left to right in each panel.$ $Top: Contours of the DM self-scattering cross section divided by the DM mass at dwarf galaxies with $v_{\rm dwarf}=10^{-4} c$ in the parameter space for $m_G$ vs $m_{\rm DM}$. We took $\sigma_T/m_{\rm DM}=0.1,1\,{\rm cm^2/g}$ for dashed and solid lines. Orange and blue lines are the results with or without Sommerfeld factors, respectively. Middle (Bottom): The DM self-scattering cross section divided by the DM mass as a function of the DM velocity for $m_{\rm DM}v_{\rm dwarf}/m_G=0.1(0.01)$ and two fixed DM masses in each plot. Dashed and solid lines are the approximate and full results for the Born cross section, respectively. $A_{\rm DM}=1$ is chosen for all the plots and DM spins are taken to $s=0,1/2,1$ from left to right in each panel.$ $Top: Contours of the DM self-scattering cross section divided by the DM mass at dwarf galaxies with $v_{\rm dwarf}=10^{-4} c$ in the parameter space for $m_G$ vs $m_{\rm DM}$. We took $\sigma_T/m_{\rm DM}=0.1,10\,{\rm cm^2/g}$. The orange dashed and solid lines are the results for the Born cross section, whereas the purple and blue lines are those for the non-perturbative cross section. Middle (Bottom): The DM self-scattering cross section divided by the DM mass as a function of the DM velocity for $m_{\rm DM}v_{\rm dwarf}/m_G=0.0185$ and two fixed DM masses in each plot. Dashed and solid lines are for the Born and non-perturbative cross sections, respectively. $A_{\rm DM}=1$ is chosen for all the plots and DM spins are taken to $s=0,1/2,1$ from left to right in each panel.$ Show more plots

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记录创建於2020-04-28，最後更新在2023-03-14

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