Results 11 to 20 of about 162 (74)
Interplay between dark matter and leptogenesis in a common framework
Journal of High Energy Physics, 2023 We consider the interplay between dark matter and leptogenesis in a common framework, where three right-handed neutrinos, one fermionic dark matter and two singlet scalars are introduced into the Standard Model.
XinXin Qi, Hao Sun
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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
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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
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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
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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
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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
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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
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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
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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
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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 +4 more
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