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Testing freeze-in with axial and vector Z′ bosons

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Testing freeze-in with axial and vector Z′ bosons

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dc.contributor.author	Cosme, Catarina
dc.contributor.author	Dutra, Maíra
dc.contributor.author	Godfrey, Stephen
dc.contributor.author	Gray, Taylor
dc.date.accessioned	2022-05-10T13:35:09Z
dc.date.available	2022-05-10T13:35:09Z
dc.date.issued	2021
dc.identifier.citation	Cosme, Catarina Dutra, Maíra Godfrey, Stephen Gray, Taylor 2021 Testing freeze-in with axial and vector Z′ bosons The Journal of high energy physics 09 56 1 26
dc.identifier.uri	https://hdl.handle.net/10550/82707
dc.description.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′ 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.
dc.language.iso	eng
dc.relation.ispartof	The Journal of high energy physics, 2021, vol. 09, num. 56, p. 1-26
dc.subject	Cosmologia
dc.subject	Partícules (Física nuclear)
dc.title	Testing freeze-in with axial and vector Z′ bosons
dc.type	journal article	es_ES
dc.date.updated	2022-05-10T13:35:09Z
dc.identifier.doi	10.1007/JHEP09(2021)056
dc.identifier.idgrec	152583
dc.rights.accessRights	open access	es_ES