Degenerate Sub-keV Fermion Dark Matter from a Solution to the Hubble Tension. (arXiv:2002.00036v1 [hep-ph])
<a href="http://arxiv.org/find/hep-ph/1/au:+Choi_G/0/1/0/all/0/1">Gongjun Choi</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Suzuki_M/0/1/0/all/0/1">Motoo Suzuki</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Yanagida_T/0/1/0/all/0/1">Tsutomu T. Yanagida</a>
We present a dark sector model addressing both the Hubble tension and the
core-cusp problem. The model is based on a hidden Abelian gauge symmetry group
with some chiral fermions required by the anomaly cancellation conditions,
producing a candidate for the decaying fermion dark matter as a solution to the
Hubble tension. Moreover, the sub-keV mass regime and the thermal history of
the dark sector help the dark matter candidate resolve the core-cusp problem
occurring in the standard $Lambda$CDM cosmology.
We present a dark sector model addressing both the Hubble tension and the
core-cusp problem. The model is based on a hidden Abelian gauge symmetry group
with some chiral fermions required by the anomaly cancellation conditions,
producing a candidate for the decaying fermion dark matter as a solution to the
Hubble tension. Moreover, the sub-keV mass regime and the thermal history of
the dark sector help the dark matter candidate resolve the core-cusp problem
occurring in the standard $Lambda$CDM cosmology.
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