2021/02/28 by Marco Chianese, M. Chianese, Bowen Fu +3 · 13 citations
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #Dark matter #Light dark matter #Neutrino #Particle physics theoretical and experimental studies #Physics beyond the Standard Model #Scalar field dark matter #Seesaw mechanism #Seesaw molecular geometry #Sterile neutrino #Yukawa potential #hep-ph
paper · pdf · open access · doi:10.1007/jhep05(2021)129
published in Journal of High Energy Physics 2021(5) (Springer Nature) · 28 pages, 4 figures, accepted by JHEP
openalex created_date 2021/03/01 · openalex publication_date 2021/05/01 · arxiv created 2021/05/17 · arxiv updated 2021/05/25 · openalex updated_date 2026/08/05
A bstract 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 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.