J. Smirnov, and J. Beacom. (2020)cite arxiv:2002.04038Comment: 5 pages plus Supplemental Material, comments are welcome.
Abstract
We present a new mechanism for thermally produced dark matter, based on a
semi-annihilation-like process, $\chi+ +SM +
SM$, with intriguing consequences for the properties of dark matter.
First, its mass is low, $1$ GeV (but $5$ keV to avoid
structure-formation constraints). Second, it is strongly interacting, leading
to kinetic equilibrium between the dark and visible sectors, avoiding the
structure-formation problems of $\chi+ + + \chi$
models. Third, in the $3 2$ process, one dark matter particle is
consumed, giving the standard-model particle a monoenergetic recoil. We show
that this new scenario is presently allowed, which is surprising (perhaps a
``minor miracle"). However, it can be systematically tested by novel analyses
in present and near-term experiments.
%0 Generic
%1 smirnov2020cosimp
%A Smirnov, Juri
%A Beacom, John F.
%D 2020
%K tifr
%T Co-SIMP Miracle
%U http://arxiv.org/abs/2002.04038
%X We present a new mechanism for thermally produced dark matter, based on a
semi-annihilation-like process, $\chi+ +SM +
SM$, with intriguing consequences for the properties of dark matter.
First, its mass is low, $1$ GeV (but $5$ keV to avoid
structure-formation constraints). Second, it is strongly interacting, leading
to kinetic equilibrium between the dark and visible sectors, avoiding the
structure-formation problems of $\chi+ + + \chi$
models. Third, in the $3 2$ process, one dark matter particle is
consumed, giving the standard-model particle a monoenergetic recoil. We show
that this new scenario is presently allowed, which is surprising (perhaps a
``minor miracle"). However, it can be systematically tested by novel analyses
in present and near-term experiments.
@misc{smirnov2020cosimp,
abstract = {We present a new mechanism for thermally produced dark matter, based on a
semi-annihilation-like process, $\chi+ \chi +\text{SM} \rightarrow \chi +
\text{SM}$, with intriguing consequences for the properties of dark matter.
First, its mass is low, $\lesssim 1$ GeV (but $\gtrsim 5$ keV to avoid
structure-formation constraints). Second, it is strongly interacting, leading
to kinetic equilibrium between the dark and visible sectors, avoiding the
structure-formation problems of $\chi+ \chi + \chi \rightarrow \chi + \chi$
models. Third, in the $3 \rightarrow 2$ process, one dark matter particle is
consumed, giving the standard-model particle a monoenergetic recoil. We show
that this new scenario is presently allowed, which is surprising (perhaps a
``minor miracle"). However, it can be systematically tested by novel analyses
in present and near-term experiments.},
added-at = {2020-02-12T11:12:07.000+0100},
author = {Smirnov, Juri and Beacom, John F.},
biburl = {https://www.bibsonomy.org/bibtex/2bd1218f6df96da739eb32d02669ac98d/citekhatri},
description = {Co-SIMP Miracle},
interhash = {ecc371c46bd9d50a37817778a535d515},
intrahash = {bd1218f6df96da739eb32d02669ac98d},
keywords = {tifr},
note = {cite arxiv:2002.04038Comment: 5 pages plus Supplemental Material, comments are welcome},
timestamp = {2020-02-12T11:12:07.000+0100},
title = {Co-SIMP Miracle},
url = {http://arxiv.org/abs/2002.04038},
year = 2020
}