@Article{Cosme_etal2021,
author="Cosme, C.
and Dutra, M.
and Godfrey, S.
and Gray, T.",
title="Testing freeze-in with axial and vector Z {\textquoteright} bosons",
journal="Journal of High Energy Physics",
year="2021",
publisher="Springer",
volume="09",
number="9",
pages="056--27pp",
optkeywords="Beyond Standard Model; Cosmology of Theories beyond the SM",
abstract="The freeze-in production of Feebly Interacting Massive Particle (FIMP) dark matter in the early universe is an appealing alternative to the well-known -- and constrained -- Weakly Interacting Massive Particle (WIMP) paradigm. Although challenging, the phenomenology of FIMP dark matter has been receiving growing attention and is possible in a few scenarios. In this work, we contribute to this endeavor by considering a Z {\textquoteright} portal to fermionic dark matter, with the Z {\textquoteright} having both vector and axial couplings and a mass ranging from MeV up to PeV. We evaluate the bounds on both freeze-in and freeze-out from direct detection, atomic parity violation, leptonic anomalous magnetic moments, neutrino-electron scattering, collider, and beam dump experiments. We show that FIMPs can already be tested by most of these experiments in a complementary way, whereas WIMPs are especially viable in the Z {\textquoteright} low mass regime, in addition to the Z {\textquoteright} resonance region. We also discuss the role of the axial couplings of Z {\textquoteright} in our results. We therefore hope to motivate specific realizations of this model in the context of FIMPs, as well as searches for these elusive dark matter candidates.",
optnote="WOS:000695081900001",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4962), last updated on Wed, 22 Sep 2021 08:45:59 +0000",
issn="1029-8479",
doi="10.1007/JHEP09(2021)056",
opturl="https://arxiv.org/abs/2104.13937",
opturl="https://doi.org/10.1007/JHEP09(2021)056",
language="English"
}