Results 31 to 40 of about 172 (75)

Dark matter transport in the early universe

, 2023
Dark matter is indispensable for explaining cosmological observations from the small to the large scale. Although the nature of dark matter remains elusive, the hypothesis of unidentified dark matter particle(s) persists as the most compelling ...
Ala-Mattinen, Kalle
core  

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

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

The scalar singlet extension of the Standard Model: gravitational waves versus baryogenesis

Journal of High Energy Physics, 2023
We study the possible gravitational wave signal and the viability of baryogenesis arising from the electroweak phase transition in an extension of the Standard Model (SM) by a scalar singlet field without a ℤ2 symmetry.
John Ellis, Marek Lewicki, Marco Merchand, José Miguel No, Mateusz Zych   +4 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

Asymmetric dark matter from leptogenesis in type-III seesaw framework with modular S 4 symmetry

Journal of High Energy Physics
We present a unified framework for neutrino masses, baryogenesis, and dark matter based on a modular S 4 symmetry combined with a type-III seesaw mechanism.
Abhishek, V. Suryanarayana Mummidi
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

Thermal leptogenesis in SO(10) × U(1) A SUSY GUT

Journal of High Energy Physics
We investigate thermal leptogenesis within a supersymmetric grand unified theory (SUSY GUT) based on the SO(10) × U(1) A symmetry, where both the doublet-triplet splitting problem and the unrealistic Yukawa relations are resolved under the natural ...
Nobuhiro Maekawa, Kei Shibata, Masato Yamanaka   +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

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