Results 41 to 50 of about 162 (74)

Forbidden neutrinogenesis

Journal of High Energy Physics
The origin of neutrino masses can be simply attributed to a new scalar beyond the Standard Model. We demonstrate that leptogenesis can explain the baryon asymmetry of the universe already in such a minimal framework.
Shinya Kanemura, Shao-Ping Li
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Leptogenesis in realistic flipped SU(5)

Journal of High Energy Physics
We study thermal leptogenesis in realistic supersymmetric flipped SU(5) × U(1) unification. As up-type quarks and neutrinos are arranged in the same multiplets, they exhibit strong correlations, and it is commonly believed that the masses of right-handed
Stephen F. King, George K. Leontaris, Luca Marsili, Ye-Ling Zhou   +3 more
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Baryogenesis via QCD preheating with nonadiabatic baryon chemical potential

Journal of High Energy Physics
The chiral phase transition in QCD can be supercooled in the thermal history of the universe to be instantaneously out-of equilibrium, if QCD is coupled to a dark QCD sector exhibiting the dark chiral phase transition of the first order. In that case the
Jimin Wang, Xin-Ru Wang, Shinya Matsuzaki   +2 more
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Unified origin of curvature perturbation and baryon asymmetry of the universe

Journal of High Energy Physics
We propose a unified framework that describes both the curvaton mechanism for generating primordial density fluctuations and the Affleck-Dine (AD) mechanism for baryogenesis.
Anish Ghoshal, Abhishek Naskar, Nobuchika Okada   +2 more
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Affleck-Dine leptoflavorgenesis

Journal of High Energy Physics
We propose a scenario to produce large primordial lepton flavor asymmetries with vanishing total lepton asymmetry, based on the Affleck-Dine mechanism with Q-ball formation.
Kensuke Akita, Koichi Hamaguchi, Maksym Ovchynnikov   +2 more
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Baryogenesis in SU(2) L multiplet models

Journal of High Energy Physics
We investigate baryogenesis in Standard Model (SM) extensions with new SU(2) L multiplet fields. We focus on sphalerogenesis, in which the baryon asymmetry of the Universe (BAU) is generated through the gradual decoupling of CP-violating electroweak ...
Kiyoto Ogawa, Masanori Tanaka
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Revisiting the minimal Nelson-Barr model

Journal of High Energy Physics
We revisit the minimal Nelson-Barr model for solving the strong CP problem through the idea of spontaneous CP breaking. The minimal model suffers from the quality problem, which means that the strong CP angle is generated by higher-dimensional operators ...
Kai Murai, Kazunori Nakayama
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Electroweak symmetry non-restoration and suppressed dark radiation in supersymmetric Twin Higgs model

Journal of High Energy Physics
We investigate a possibility of electroweak symmetry non-restoration (SNR) below the Twin electroweak scale (~ TeV) within the Twin Higgs model. We focus on supersymmetric extensions with light sfermions where SNR is driven by mirror symmetry breaking in
Marcin Badziak, Keisuke Harigaya, Ignacy Nałęcz   +2 more
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Bridging the μHz gap in the gravitational-wave landscape: unveiling dark baryons

Journal of High Energy Physics
We study gravitational waves (GWs) with frequencies in the μHz range, which arise from phase transitions related to dark confinement in the context of dark versions of Quantum Chromodynamics.
Martin Rosenlyst
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Purely flavored leptogenesis from a sudden mass gain of right-handed neutrinos

Journal of High Energy Physics
In this paper, we would like to point out that in the scenario that the right-handed neutrinos suddenly gain some masses much larger than the temperature of the Universe at that time so that the washout effects for the lepton asymmetry generated from ...
Zhen-hua Zhao, Jing Zhang, Xiang-Yi Wu
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