Results 21 to 30 of about 132 (62)

Leptogenesis in SO(10) with minimal Yukawa sector

Journal of High Energy Physics
In prior studies, a very minimal Yukawa sector within the SO(10) Grand Unified Theory framework has been identified, comprising of Higgs fields belonging to a real 10 H , a real 120 H , and a 126 ¯ H $$ {\overline{126}}_H $$ dimensional representations ...
K. S. Babu, Pasquale Di Bari, Chee Sheng Fong, Shaikh Saad   +3 more
doaj   +1 more source

Thermal leptogenesis in the minimal gauged U 1 L μ − L τ $$ \textrm{U}{(1)}_{L_{\mu }-{L}_{\tau }} $$ model

Journal of High Energy Physics, 2023
We discuss the thermal leptogenesis mechanism within the minimal gauged U 1 L μ − L τ $$ \textrm{U}{(1)}_{L_{\mu }-{L}_{\tau }} $$ model to explain the observed baryon asymmetry of the Universe (BAU).
A. Granelli, K. Hamaguchi, N. Nagata, M. E. Ramirez-Quezada, J. Wada   +4 more
doaj   +1 more source

Baryogenesis from cosmological CP breaking

Journal of High Energy Physics
We show that baryogenesis can arise from the cosmological evolution of a scalar field that governs CP-violating parameters, such as the Yukawa couplings and the theta terms of the Standard Model.
Mateusz Duch, Alessandro Strumia, Arsenii Titov   +2 more
doaj   +1 more source

Lepto-axiogenesis and the scale of supersymmetry

Journal of High Energy Physics, 2023
If the Peccei-Quinn field containing the QCD axion undergoes rotations in the early universe, the dimension-five operator responsible for neutrino masses can generate a lepton asymmetry that ultimately gives rise to the observed baryon asymmetry of the ...
Patrick Barnes, Raymond T. Co, Keisuke Harigaya, Aaron Pierce   +3 more
doaj   +1 more source

Spontaneous CP violation and leptogenesis in SO(10)

Journal of High Energy Physics
We present a renormalizable SO(10) grand unified theory with a minimal Yukawa sector consisting of a 126 H , a real 10 H and a real 120 H , where CP violation has a spontaneous origin.
K. S. Babu, Chee Sheng Fong, Shaikh Saad
doaj   +1 more source

Predicting the baryon asymmetry with degenerate right-handed neutrinos

Journal of High Energy Physics, 2023
We consider the generation of a baryon asymmetry in an extension of the Standard Model with two singlet Majorana fermions that are degenerate above the electroweak phase transition.
S. Sandner, P. Hernández, J. López-Pavón, N. Rius   +3 more
doaj   +1 more source

Electroweak triplet scalar contribution to SO(10) leptogenesis

Journal of High Energy Physics
We show that electroweak triplet scalar can significantly impact baryogenesis via leptogenesis in concrete and predictive SO(10) GUTs, even when light neutrino masses arise predominantly from the type-I seesaw mechanism.
Chee Sheng Fong, Ketan M. Patel
doaj   +1 more source

Resummation and cancellation of the VIA source in electroweak baryogenesis

Journal of High Energy Physics, 2022
We re-derive the vev-insertion approximation (VIA) source in electroweak baryogenesis. In contrast to the original derivation, we rely solely on 1-particle-irreducible self-energy diagrams.
Marieke Postma, Jorinde van de Vis, Graham White   +2 more
doaj   +1 more source

Freeze-in leptogenesis with sterile neutrino self-interactions

Journal of High Energy Physics
Sterile neutrinos are a simple yet compelling addition to the Standard Model. For right-handed neutrinos with masses below the electroweak scale, leptogenesis can proceed through CP-violating oscillations of the sterile neutrinos. This is known as ARS or
María Dias Astros, Stefan Vogl
doaj   +1 more source

Wash-in leptogenesis after axion inflation

Journal of High Energy Physics, 2023
CP violation and the violation of baryon-minus-lepton number B−L do not necessarily have to occur simultaneously in order to accomplish successful leptogenesis.
Valerie Domcke, Kohei Kamada, Kyohei Mukaida, Kai Schmitz, Masaki Yamada   +4 more
doaj   +1 more source