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High Energy Physics - Phenomenology

Title: Brief on Dark Matter in the Type Ib Seesaw Model: a GeV-scale Dirac neutrino portal

Authors: Bowen Fu
Abstract: The type Ib seesaw, as an alternative explanation to the origin of neutrino mass, provides a new intriguing way to connect the neutrino physics to cosmology. In this proceeding, we consider a minimal type Ib seesaw model where the effective neutrino mass operator involves two different Higgs doublets and a heavy Dirac mass. We propose a minimal dark matter extension of this model, in which the Dirac heavy neutrino is coupled to a dark Dirac fermion and a dark complex scalar field, both odd under a discrete $Z_2$ symmetry, where the lighter one serves as a dark matter candidate. Focussing on the fermionic dark matter case, we explore the parameter space of the seesaw Yukawa couplings, the neutrino portal couplings and dark scalar to dark fermion mass ratio, where correct dark matter relic abundance can be produced by the freeze-in mechanism. By considering the mixing between the standard model neutrinos and the heavy neutrino, a connection can be built between dark matter production and laboratory experiments.
Comments: 4 pages, 2 figures, 1 table, contribution to the conference proceedings of EPS-HEP2021
Subjects: High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:2110.09682 [hep-ph]
  (or arXiv:2110.09682v1 [hep-ph] for this version)

Submission history

From: Bowen Fu [view email]
[v1] Tue, 19 Oct 2021 01:24:34 GMT (446kb,D)

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