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Dark matter in the Type Ib seesaw model

Dark matter in the Type Ib seesaw model
Dark matter in the Type Ib seesaw model
We consider a minimal type Ib seesaw model where the effective neutrino mass operator involves two different Higgs doublets, and the two right-handed neutrinos form 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 charged under a discrete $Z_2$ symmetry, where the lighter of the two is 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 between the standard model neutrinos and the heavy neutrino, we build a connection between the dark matter production and current laboratory experiments ranging from collider to lepton flavour violating experiments. For a GeV mass heavy neutrino, the parameters related to dark matter production are constrained by the experimental results directly and can be further tested by future experiments such as SHiP.
Cosmology of Theories beyond the SM, Neutrino Physics
Chianese, Marco
73113e4b-5eb5-4cdc-831b-90f4678588d6
Fu, Bowen
71c18b27-d30a-4e33-806b-e45ea5446e46
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538
Chianese, Marco
73113e4b-5eb5-4cdc-831b-90f4678588d6
Fu, Bowen
71c18b27-d30a-4e33-806b-e45ea5446e46
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538

Chianese, Marco, Fu, Bowen and King, Stephen F. (2021) Dark matter in the Type Ib seesaw model. Journal of High Energy Physics, 2021 (5), [129]. (doi:10.1007/JHEP05(2021)129).

Record type: Article

Abstract

We consider a minimal type Ib seesaw model where the effective neutrino mass operator involves two different Higgs doublets, and the two right-handed neutrinos form 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 charged under a discrete $Z_2$ symmetry, where the lighter of the two is 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 between the standard model neutrinos and the heavy neutrino, we build a connection between the dark matter production and current laboratory experiments ranging from collider to lepton flavour violating experiments. For a GeV mass heavy neutrino, the parameters related to dark matter production are constrained by the experimental results directly and can be further tested by future experiments such as SHiP.

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2102.07780v2 - Version of Record
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Published date: May 2021
Additional Information: Publisher Copyright: © 2021, The Author(s). Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
Keywords: Cosmology of Theories beyond the SM, Neutrino Physics

Identifiers

Local EPrints ID: 452802
URI: http://eprints.soton.ac.uk/id/eprint/452802
PURE UUID: 4df16f2d-edeb-4397-aeb3-80fadde8d296
ORCID for Bowen Fu: ORCID iD orcid.org/0000-0003-2270-8352

Catalogue record

Date deposited: 20 Dec 2021 17:56
Last modified: 28 Apr 2022 02:27

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Contributors

Author: Marco Chianese
Author: Bowen Fu ORCID iD
Author: Stephen F. King

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