Results 1 to 10 of about 168 (75)

Neutrino mass and leptogenesis in a hybrid seesaw model with a spontaneously broken CP

Journal of High Energy Physics, 2023
We introduce a novel hybrid framework combining type I and type II seesaw models for neutrino mass where a complex vacuum expectation value of a singlet scalar field breaks CP spontaneously.
Tirtha Sankar Ray, Avirup Shaw, Rohan Pramanick   +2 more
exaly   +2 more sources

Cosmological CPT-violation, baryo/leptogenesis and CMB polarization

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2007
In this Letter we study the cosmological CPT-violation and its implications in baryo/leptogenesis and CMB polarization. We propose specifically a variant of the models of gravitational leptogenesis.
Mingzhe Li, Hong Li, Junqing Xia
exaly   +2 more sources

Introduction to Baryo- and Leptogenesis

Surveys in High Energy Physics, 2006
info:eu-repo/semantics ...
J -M Frere
exaly   +1 more source

Common origin of dark matter and leptogenesis in U(1)B−L

Journal of High Energy Physics
In this paper, we investigate the common parameter space of dark matter and leptogenesis in the U(1) B−L symmetry. This model involves a complex scalar ϕ, sterile neutrinos N, and Majorana dark matter χ, where only dark matter χ is charged under the Z 2 ...
Feng-Lan Shao, Zhi-Long Han, Yi Jin
exaly   +2 more sources

Second leptogenesis: Unraveling the baryon-lepton asymmetry discrepancy

Journal of High Energy Physics
We propose a novel scenario to explain the matter-antimatter asymmetry by twofold leptogenesis, wherein heavy Majorana neutrinos exhibit temperature-dependent masses and engage in CP-violating decays.
Kazuki Enomoto, Hye-Sung Lee, Yeollin Choejo   +2 more
exaly   +2 more sources

Leptogenesis in five-dimensional asymptotic grand unification models

Journal of High Energy Physics
Asymptotic grand unification models can be constructed in five dimensions compactified on an orbifold. We demonstrate that the parameter space of such models admit solutions that naturally achieve the baryon asymmetry via leptogenesis, these solutions ...
Aldo Deandrea, Giacomo Cacciapaglia
exaly   +2 more sources

New benchmark scenarios of electroweak baryogenesis in aligned two Higgs double models

Journal of High Energy Physics, 2022
We discuss electroweak baryogenesis in aligned two Higgs doublet models. It is known that in this model the severe constraint from the experimental results for the electron electric dipole moment can be avoided by destructive interference among CP ...
Kazuki Enomoto, Shinya Kanemura, Yushi Mura   +2 more
doaj   +1 more source

Type II Seesaw leptogenesis

Journal of High Energy Physics, 2022
The Type II Seesaw Mechanism provides a minimal framework to explain the neutrino masses involving the introduction of a single triplet Higgs to the Standard Model.
Neil D. Barrie, Chengcheng Han, Hitoshi Murayama   +2 more
doaj   +1 more source

Leptogenesis in SO(10) models with A4 modular symmetry

Journal of High Energy Physics, 2022
We study the prediction for leptogenesis in two renormalizable supersymmetric SO(10) × A 4 modular models in which the neutrino mass is dominantly generated by the type I seesaw mechanism. The evolution of the lepton asymmetries are described in terms of
Gui-Jun Ding, Stephen F. King, Jun-Nan Lu, Bu-Yao Qu   +3 more
doaj   +1 more source

Doubly peaked induced stochastic gravitational wave background: testing baryogenesis from primordial black holes

Journal of High Energy Physics, 2022
Hawking evaporation of primordial black holes (PBHs) can facilitate the generation of matter-antimatter asymmetry. We focus on ultra-low mass PBHs that briefly dominate the universe and evaporate before the big bang nucleosynthesis.
Nilanjandev Bhaumik, Anish Ghoshal, Marek Lewicki   +2 more
doaj   +1 more source