Light Z ' and dark matter from U(1)(x) gauge symmetry

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Date
2020
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract

We consider a U(1)(_{X}) gauge symmetry extension of the Standard Model (SM) with a ({Z}^{\prime })-portal Majorana fermion dark matter that allows for a relatively light gauge boson ({Z}^{\prime }) 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 reversed, and the dark matter mass, in the keV range or so, lies well below the ({Z}^{\prime }) mass, say, ∼1 GeV. We outline the parameter space that can be explored for these two scenarios at the future Lifetime Frontier experiments including Belle-II, FASER, LDMX and SHiP.

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Keywords
B-L SYMMETRY, NEUTRINO MASSES, BARYOGENESIS, SCALE, BURST, Astronomy & Astrophysics, Physics, Nuclear, Physics, Particles & Fields, Physics
Citation
Okada, N., Okada, S., & Shafi, Q. (2020). Light Z′ and dark matter from U(1) gauge symmetry. In Physics Letters B (Vol. 810, p. 135845). Elsevier BV. https://doi.org/10.1016/j.physletb.2020.135845