TY  - JOUR
AU  - Cosme, C.
AU  - Dutra, M.
AU  - Godfrey, S.
AU  - Gray, T.
PY  - 2021
DA  - 2021//
TI  - Testing freeze-in with axial and vector Z ' bosons
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 056
EP  - 27pp
VL  - 09
IS  - 9
PB  - Springer
KW  - Beyond Standard Model
KW  - Cosmology of Theories beyond the SM
AB  - 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 ' portal to fermionic dark matter, with the Z ' 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 ' low mass regime, in addition to the Z ' resonance region. We also discuss the role of the axial couplings of Z ' 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.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2104.13937
UR  - https://doi.org/10.1007/JHEP09(2021)056
DO  - 10.1007/JHEP09(2021)056
LA  - English
N1  - WOS:000695081900001
ID  - Cosme_etal2021
ER  -