Results 31 to 40 of about 691 (101)

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

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

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

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

Lepton asymmetry and the cosmic QCD transition

, 2009
We study the influence of lepton asymmetry on the evolution of the early Universe. The lepton asymmetry $l$ is poorly constrained by observations and might be orders of magnitude larger than the baryon asymmetry $b$, $|l|/b \leq 2\times 10^8$.
, C. Schmidt, Dominik J Schwarz, E.R. Siegel, L.A. Popa, M.A. Stephanov, M.J. Fromerth, Maik Stuke, O. Philipsen, RBC-Bielefeld collaboration, V. Simha, W.H. Press ., WMAP collaboration, Z. Fodor   +13 more
core   +1 more source

Three Active and Two Sterile Neutrinos in an E_6 Model of Diquark Baryogenesis [PDF]

, 2000
In the U(1)_N extension of the supersymmetric standard model with E_6 particle content, the heavy singlet superfield N may decay into a quark and a diquark as well as an antiquark and an antidiquark, thus creating a baryon asymmetry of the Universe.
Ma, Ernest, Raidal, Martti
core   +2 more sources

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

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 via leptogenesis in multi-field inflation

, 2018
In multi-field reheating after modular $j$-inflation we investigate the conditions under which baryogenesis via non-thermal leptogenesis can be successfully realized.
Panotopoulos, Grigoris, Videla, Nelson
core   +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