Light Z′ and dark matter from U(1)X gauge symmetry
We consider a U(1)X gauge symmetry extension of the Standard Model (SM) with a Z′-portal Majorana fermion dark matter that allows for a relatively light gauge boson Z′ with mass of 10 MeV− a few GeV and a much heavier dark matter through the freeze-in mechanism. In a second scenario the roles are re...
Main Authors: | Nobuchika Okada, Satomi Okada, Qaisar Shafi |
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Format: | Article |
Language: | English |
Published: |
Elsevier
2020-11-01
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Series: | Physics Letters B |
Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269320306481 |
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