Results 21 to 30 of about 172 (75)
Advances in High Energy Physics, Volume 2012, Issue 1, 2012., 2012 Standard Model fails to explain neutrino oscillations, dark matter, and baryon asymmetry of the Universe. All these problems can be solved with three sterile neutrinos added to SM. Quite remarkably, if sterile neutrino masses are well below the electroweak scale, this modification—Neutrino Minimal Standard Model (νMSM)—can be tested experimentally.
S. N. Gninenko +3 more
wiley +1 more source
Electroweak baryogenesis via top-charm mixing
Journal of High Energy Physics, 2023 We investigate a scenario of electroweak baryogenesis in the two Higgs doublet model with quark flavor mixing. In general, off-diagonal components of quark Yukawa interactions with additional Higgs bosons are strongly constrained by the data for flavor ...
Shinya Kanemura, Yushi Mura
doaj +1 more source
Observable r, gravitino dark matter, and non-thermal leptogenesis in no-scale supergravity
Journal of High Energy Physics, 2023 We analyse the shifted hybrid inflation in a no-scale supersymmetric SU(5) GUT model which naturally circumvents the monopole problem. The no-scale framework is derivable as the effective field theory of the supersymmetric (SUSY) compactifications of ...
Waqas Ahmed +3 more
doaj +1 more source
Journal of High Energy Physics, 2022 We propose a new mechanism to simultaneously explain the observed dark matter abundance and the baryon asymmetry of the Universe. The mechanism is based on the Filtered Dark Matter scenario, where dark matter particles acquire a large mass during a first-
Michael J. Baker +4 more
doaj +1 more source
Scalar-singlet assisted leptogenesis with CP violation from the vacuum
Journal of High Energy Physics, 2023 In the vanilla type-I seesaw leptogenesis scenario, CP violation required to generate the lepton asymmetries in the heavy Majorana neutrino decays stem from complex Dirac-type Yukawa couplings. In this paper we explore the case in which that CP violation
D. M. Barreiros +3 more
doaj +1 more source
Leptonic CP asymmetry and Light flavored scalar
Journal of High Energy Physics, 2023 We consider a situation where right-handed neutrinos couple to a light scalar which is possibly a Nambu-Goldstone boson resulting from high-energy symmetry breaking. Its coupling is typically complex-valued and flavor-dependent.
Yoshihiko Abe +2 more
doaj +1 more source
The Exact WKB analysis for asymmetric scalar preheating
Journal of High Energy Physics, 2023 Using the exact WKB analysis of the higher-order differential equations, we analyze the asymmetry in dynamical particle production of a complex scalar field. The solution requires the Stokes phenomena of the fourth-order differential equation.
Seishi Enomoto, Tomohiro Matsuda
doaj +1 more source
Leptogenesis in automatic Nelson-Barr models
Journal of High Energy PhysicsIn 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
Type II seesaw dominance in
, 2010 Grand unified theories where the neutrino mass is given by Type II seesaw have the potential to provide interesting connections between the neutrino and charged fermion sectors.
Goran Senjanović +2 more
core +1 more source
Journal of High Energy Physics, 2023 Ultra-low mass primordial black holes (PBH), which may briefly dominate the energy density of the universe but completely evaporate before the big bang nucleosynthesis (BBN), can lead to interesting observable signatures. In our previous work, we studied
Nilanjandev Bhaumik +3 more
doaj +1 more source