Results 21 to 30 of about 162 (74)

Affleck-Dine baryo/leptogenesis with a gauged U(1)(B-L)

, 2001
We briefly review the present status of Affleck-Dine baryo/leptogenesis scenarios in the minimal supersymmetric standard model (MSSM) in the context of the gravity-mediated SUSY breaking, and show that there is a serious cosmological problem in the Affleck-Dine mechanism.
Fujii, Masaaki, Hamaguchi, K., Yanagida, T.   +2 more
openaire   +2 more sources

Leptogenesis in automatic Nelson-Barr models

Journal of High Energy Physics
In this study, we numerically show that automatic Nelson-Barr models with new chiral fermions can simultaneously solve the strong CP problem and generate the observed baryon asymmetry via high-scale leptogenesis.
C. Murgui, S. Patrone
doaj   +1 more source

Baryogenesis and dark matter in the mirror twin Higgs

Journal of High Energy Physics, 2023
We consider a natural asymmetric dark matter (ADM) model in the mirror twin Higgs (MTH). We show that it is possible to obtain the correct dark matter (DM) abundance when a twin baryon is the DM without the need of explicit breaking of the MTH ℤ2 ...
Pedro Bittar, Gustavo Burdman, Larissa Kiriliuk   +2 more
doaj   +1 more source

Z2 non-restoration and composite Higgs: singlet-assisted baryogenesis w/o topological defects

Journal of High Energy Physics, 2022
Simple scalar-singlet extensions of the Standard Model with a (spontaneously broken) Z 2 symmetry allow for a strong first order electroweak phase transition, as sought in order to realize electroweak baryogenesis.
Andrei Angelescu, Florian Goertz, Aika Tada   +2 more
doaj   +1 more source

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

Bounds on right-handed neutrino parameters from observable leptogenesis

Journal of High Energy Physics, 2022
We revisit the generation of a matter-antimatter asymmetry in the minimal extension of the Standard Model with two singlet heavy neutral leptons (HNL) that can explain neutrino masses. We derive an accurate analytical approximation to the solution of the
P. Hernández, J. López-Pavón, N. Rius, S. Sandner   +3 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

Low-scale leptogenesis with flavour and CP symmetries

Journal of High Energy Physics, 2022
We consider a type-I seesaw framework endowed with a flavour symmetry, belonging to the series of non-abelian groups ∆(3 n 2) and ∆(6 n 2), and a CP symmetry.
M. Drewes, Y. Georis, C. Hagedorn, J. Klarić   +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

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