Brief on dark matter in the type Ib seesaw model: a GeV-scale Dirac neutrino portal
Brief on dark matter in the type Ib seesaw model: a GeV-scale Dirac neutrino portal
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.
132
Fu, Bowen
71c18b27-d30a-4e33-806b-e45ea5446e46
12 January 2022
Fu, Bowen
71c18b27-d30a-4e33-806b-e45ea5446e46
Fu, Bowen
(2022)
Brief on dark matter in the type Ib seesaw model: a GeV-scale Dirac neutrino portal.
In The European Physical Society Conference on High Energy Physics.
vol. 398,
.
(doi:10.22323/1.398.0132).
Record type:
Conference or Workshop Item
(Paper)
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.
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EPS-HEP2021_132
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Published date: 12 January 2022
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The European Physical Society Conference on High Energy Physics, Online conference, jointly organized by Universität Hamburg and the research center DESY, 2021-07-26
Identifiers
Local EPrints ID: 456200
URI: http://eprints.soton.ac.uk/id/eprint/456200
PURE UUID: 29d27eb1-cc9c-42a2-af6f-d1711f3b3828
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Date deposited: 26 Apr 2022 16:47
Last modified: 11 Jul 2024 05:26
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