Low-scale resonant leptogenesis in S U ( 5 ) GUT with T 13 family symmetry
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71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSIC↗
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Assessing the tension between a black hole dominated early universe and leptogenesis
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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
μ -hybrid inflation, gravitino dark matter, and stochastic gravitational wave background from cosmic strings
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79 ASTRONOMY AND ASTROPHYSICS↗
Search for B 0 meson decays into Λ and missing energy with a hadronic tagging method at Belle
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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗
Affleck-Dine leptogenesis with one loop neutrino masses and a solution to the strong C P problem
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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Asymmetric matter from a dark first-order phase transition
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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Axion cogenesis without isocurvature perturbations
Axion rotations can simultaneously explain the dark matter abundance and the baryon asymmetry of the Universe by kinetic misalignment and axiogenesis. We consider a scenario in which the Peccei-Quinn symmetry breaking field is as large as the Planck scale during inflation and the axion rotation is initiated by the inflaton-induced potential immediately after the end of inflation. This is a realization of the cogenesis scenario that is free of problems with domain walls and isocurvature perturbations thanks to large explicit Peccei-Quinn symmetry breaking at the Planck scale during inflation. The baryon asymmetry can be more efficiently produced by leptoaxiogenesis, in which case the axion mass is predicted to be larger than O(0.1) meV. We also discuss a UV complete model in supersymmetric theories.
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Implications of the Upper Bound on h → μ + μ - on the Baryon Asymmetry of the Universe
The upper bounds from the ATLAS and CMS experiments on the decay rate of the Higgs boson to two muons provide the strongest constraint on an imaginary part of the muon Yukawa coupling. This bound is more than an order of magnitude stronger than bounds from $\mathcal{CP}$-violating observables, specifically the electric dipole moment of the electron. It excludes a scenario $-$ which had been viable prior to these measurements $-$ that a complex muon Yukawa coupling is the dominant source of the baryon asymmetry. Even with this bound, the muon source can still contribute ${\cal O}(16\%)$ of the asymmetry.
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Decaying scalar dark matter in the minimal left-right symmetric model
In the minimal left-right symmetric theory, the dark matter candidate is usually ascribed to the lightest right-handed neutrino. Here we present an alternative decaying dark matter candidate in this model in terms of the lightest neutral scalar from the 𝑆𝑈(2) 𝑅 -triplet field. This setup requires a vast hierarchy between the scalar mass and the left-right symmetry breaking scale, which renders the scalar dark matter sufficiently stable on cosmological time scales. The stability of the dark matter imposes constraints on the right-handed neutrino mass, which has consequences for the neutrino mass generation, as well as for leptogenesis. Although somewhat fine-tuned, it provides a very economical scenario wherein the minimal left-right model can simultaneously explain dark matter, neutrino masses, and the matter-antimatter asymmetry of the Universe.
baryogenesis↗