Singlet-doublet dark matter induced radiative neutrino mass and TeV scale leptogenesis
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , |
|---|---|
| Format: | Preprint |
| Publié: |
2026
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866911652486578176 |
|---|---|
| author | Paul, Partha Kumar Sahu, Narendra Sharma, Shashwat |
| author_facet | Paul, Partha Kumar Sahu, Narendra Sharma, Shashwat |
| contents | The singlet-doublet dark matter (SDDM) model is a well-motivated WIMP framework that accommodates viable dark matter over a broad range of parameter space. In this work, we explore the possibility of TeV-scale leptogenesis within two realizations of the SDDM setup: Majorana SDDM scenario and Dirac SDDM scenario. The light neutrino mass, in either case, arises radiatively at one loop level. The particles running in the loop are responsible for Dark matter relic and TeV-scale leptogenesis while satisfying other phenomenological constraints. In the Majorana setup, the Standard Model is extended by three generations of singlet fermions $N_i$ and doublet fermions $Ψ_i$, and a singlet scalar $ϕ$. The \textit{CP}-violating, out-of-equilibrium decays of the heavier singlets ($N_{2,3}$) generate baryon asymmetry via the leptogenesis route, while the first generation of singlet-doublet fermions give rise to the usual SD Majorana dark matter. In the Dirac setup, the standard model is extended by three generations of complex scalars ($ϕ_i$) and right-handed Dirac partners ($ν_{R_i}$) of SM neutrinos ($ν_{L_i}$), along with a pair of singlet-doublet fermions $χ$ and $Ψ$. The \textit{CP}-violating out-of-equilibrium decays of the scalar fields $ϕ_i$ generate baryon asymmetry via the Dirac leptogenesis route. We show that in the Majorana setup, successful leptogenesis is possible even in the sub-TeV regime, while in the Dirac setup, the scale of leptogenesis is at a few TeV. With the particle mass at the TeV scale, the model remains promising for collider experiments, particularly through signatures such as prompt decays and displaced vertex searches. In addition, the presence of Dirac neutrinos can contribute to $ΔN_{\rm eff}$, providing complementary cosmological signatures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_04824 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Singlet-doublet dark matter induced radiative neutrino mass and TeV scale leptogenesis Paul, Partha Kumar Sahu, Narendra Sharma, Shashwat High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Physics - Experiment High Energy Physics - Theory The singlet-doublet dark matter (SDDM) model is a well-motivated WIMP framework that accommodates viable dark matter over a broad range of parameter space. In this work, we explore the possibility of TeV-scale leptogenesis within two realizations of the SDDM setup: Majorana SDDM scenario and Dirac SDDM scenario. The light neutrino mass, in either case, arises radiatively at one loop level. The particles running in the loop are responsible for Dark matter relic and TeV-scale leptogenesis while satisfying other phenomenological constraints. In the Majorana setup, the Standard Model is extended by three generations of singlet fermions $N_i$ and doublet fermions $Ψ_i$, and a singlet scalar $ϕ$. The \textit{CP}-violating, out-of-equilibrium decays of the heavier singlets ($N_{2,3}$) generate baryon asymmetry via the leptogenesis route, while the first generation of singlet-doublet fermions give rise to the usual SD Majorana dark matter. In the Dirac setup, the standard model is extended by three generations of complex scalars ($ϕ_i$) and right-handed Dirac partners ($ν_{R_i}$) of SM neutrinos ($ν_{L_i}$), along with a pair of singlet-doublet fermions $χ$ and $Ψ$. The \textit{CP}-violating out-of-equilibrium decays of the scalar fields $ϕ_i$ generate baryon asymmetry via the Dirac leptogenesis route. We show that in the Majorana setup, successful leptogenesis is possible even in the sub-TeV regime, while in the Dirac setup, the scale of leptogenesis is at a few TeV. With the particle mass at the TeV scale, the model remains promising for collider experiments, particularly through signatures such as prompt decays and displaced vertex searches. In addition, the presence of Dirac neutrinos can contribute to $ΔN_{\rm eff}$, providing complementary cosmological signatures. |
| title | Singlet-doublet dark matter induced radiative neutrino mass and TeV scale leptogenesis |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Physics - Experiment High Energy Physics - Theory |
| url | https://arxiv.org/abs/2605.04824 |