Results 31 to 40 of about 168 (75)
Thermal leptogenesis in SO(10) × U(1) A SUSY GUT
Journal of High Energy PhysicsWe investigate thermal leptogenesis within a supersymmetric grand unified theory (SUSY GUT) based on the SO(10) × U(1) A symmetry, where both the doublet-triplet splitting problem and the unrealistic Yukawa relations are resolved under the natural ...
Nobuhiro Maekawa +2 more
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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 +3 more
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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 +3 more
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Electroweak triplet scalar contribution to SO(10) leptogenesis
Journal of High Energy PhysicsWe show that electroweak triplet scalar can significantly impact baryogenesis via leptogenesis in concrete and predictive SO(10) GUTs, even when light neutrino masses arise predominantly from the type-I seesaw mechanism.
Chee Sheng Fong, Ketan M. Patel
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Freeze-in leptogenesis with sterile neutrino self-interactions
Journal of High Energy PhysicsSterile neutrinos are a simple yet compelling addition to the Standard Model. For right-handed neutrinos with masses below the electroweak scale, leptogenesis can proceed through CP-violating oscillations of the sterile neutrinos. This is known as ARS or
María Dias Astros, Stefan Vogl
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Lepto-axiogenesis and the scale of supersymmetry
Journal of High Energy Physics, 2023 If the Peccei-Quinn field containing the QCD axion undergoes rotations in the early universe, the dimension-five operator responsible for neutrino masses can generate a lepton asymmetry that ultimately gives rise to the observed baryon asymmetry of the ...
Patrick Barnes +3 more
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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 +4 more
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Addressing six standard model problems with Technically Natural Higgs models
Journal of High Energy Physics, 2023 We aim to study the potential of the recently proposed model framework, called Technically Natural Higgs (TNH), in addressing six fundamental problems in particle physics and cosmology.
Martin Rosenlyst
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Magnetic helicity, magnetic monopoles, and Higgs winding
Journal of High Energy PhysicsChanges in magnetic helicity are often discussed across a variety of fields, from condensed matter physics to early universe cosmology. It is frequently stated that the helicity change is given by the integral of the gauge field strength tensor and its ...
Hajime Fukuda +4 more
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Collider probes of baryogenesis with maximal CP asymmetry
Journal of High Energy PhysicsWe propose a novel collider probe of baryogenesis at TeV scale by measuring decay asymmetries into particle and anti-particle final states. Motivated by the idea of Dirac leptogenesis, we consider an extension of the standard model with new colored and ...
Debasish Borah +4 more
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