Maximally self-interacting dark matter: models and predictions. (arXiv:2007.15522v2 [hep-ph] UPDATED)

Maximally self-interacting dark matter: models and predictions. (arXiv:2007.15522v2 [hep-ph] UPDATED)
<a href="http://arxiv.org/find/hep-ph/1/au:+Kamada_A/0/1/0/all/0/1">Ayuki Kamada</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Kim_H/0/1/0/all/0/1">Hee Jung Kim</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Kuwahara_T/0/1/0/all/0/1">Takumi Kuwahara</a>

We study self-interacting dark matter (SIDM) scenarios, where the $s$-wave
self-scattering cross section almost saturates the Unitarity bound. Such
self-scattering cross sections are singly parameterized by the dark matter
mass, and are featured by strong velocity dependence in a wide range of
velocities. They may be indicated by observations of dark matter halos in a
wide range of masses, from Milky Way’s dwarf spheroidal galaxies to galaxy
clusters. We pin down the model parameters that saturates the Unitarity bound
in well-motivated SIDM models: the gauged $L_{mu} – L_{tau}$ model and
composite asymmetric dark matter model. We discuss implications and predictions
of such model parameters for cosmology like the $H_{0}$ tension and dark-matter
direct-detection experiments, and particle phenomenology like the beam-dump
experiments.

We study self-interacting dark matter (SIDM) scenarios, where the $s$-wave
self-scattering cross section almost saturates the Unitarity bound. Such
self-scattering cross sections are singly parameterized by the dark matter
mass, and are featured by strong velocity dependence in a wide range of
velocities. They may be indicated by observations of dark matter halos in a
wide range of masses, from Milky Way’s dwarf spheroidal galaxies to galaxy
clusters. We pin down the model parameters that saturates the Unitarity bound
in well-motivated SIDM models: the gauged $L_{mu} – L_{tau}$ model and
composite asymmetric dark matter model. We discuss implications and predictions
of such model parameters for cosmology like the $H_{0}$ tension and dark-matter
direct-detection experiments, and particle phenomenology like the beam-dump
experiments.

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