Z′-mediated dark matter freeze-in at stronger coupling

We study freeze-in production of fermionic dark matter mediated by a Z′ gauge boson. In particular, we explore the regime of Boltzmann-suppressed production, when the Standard Model (SM) thermal bath temperature never exceeds the dark matter mass. The corresponding gauge coupling is then required to...

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Bibliographic Details
Main Authors: Giorgio Arcadi, David Cabo-Almeida, Oleg Lebedev
Format: Article
Language:English
Published: Elsevier 2025-02-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269325000280
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