Results 71 to 80 of about 2,417 (206)
Simulations of cold electroweak baryogenesis: dependence on the source of CP-violation
Journal of High Energy Physics, 2018 We compute the baryon asymmetry created in a tachyonic electroweak symmetry breaking transition, focusing on the dependence on the source of effective CP-violation. Earlier simulations of Cold Electroweak Baryogenesis have almost exclusively considered a
Zong-Gang Mou +2 more
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Electroweak-like baryogenesis with new chiral matter
Journal of High Energy Physics, 2021 We propose a framework where a phase transition associated with a gauge symmetry breaking that occurs (not far) above the electroweak scale sets a stage for baryogenesis similar to the electroweak baryogenesis in the Standard Model.
Kohei Fujikura +3 more
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A novel approach to baryogenesis in f(Q,Lm) gravity and its cosmological implications
Nuclear Physics BWe present an examination of the f(Q,Lm) gravity model, in which the functional form f(Q,Lm)=αQn+βLm is postulated and discuss its potential impact on cosmological dynamics and the phenomenon of gravitational baryogenesis.
Amit Samaddar, S. Surendra Singh
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Journal of Cosmology and Astroparticle Physics, 2020 We explore the possibility of an Ekpyrotic contraction phase harbouring a mechanism for Baryogenesis. A Chern-Simons coupling between the fast-rolling Ekpyrotic scalar and the Standard Model Hypercharge gauge field enables the generation of a non-zero helicity during the contraction phase.
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Electroweak baryogenesis in 2HDM without EDM cancellation
Journal of High Energy PhysicsWe study two Higgs doublet models with successful electroweak baryogenesis but without cancellations of electric dipole moments (EDMs). For the baryogenesis, additional scalar bosons are favored to couple mainly with the top quark with CP violations ...
Masashi Aiko +3 more
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Baryon asymmetry from higher-order matter contributions in gravity
Physics Letters BWe investigate the observed asymmetry between matter and antimatter by incorporating higher-order matter contributions in gravity, specifically analyzing gravitational baryogenesis within the framework of f(R,T2) gravity, where R is the Ricci scalar and ...
David S. Pereira +2 more
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Cadernos de Astronomia, 2023 The standard model of particle physics describes matter and antimatter as coming from the same fields and this fact has been confirmed experimentally. It is then curious that the observable universe is made of matter and not antimatter. We will first discuss the evidence that we live in a matter-dominated (or matter-antimatter asymmetric) Universe and ...
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RADION INDUCED SPONTANEOUS BARYOGENESIS [PDF]
Modern Physics Letters A, 2007 We describe a possible scenario for spontaneous baryogenesis given by the Randall–Sundrum brane-world model with two branes and a radion stabilizing potential. It is known that the cosmological expansion of the Universe can be recovered in this brane-world model by adding matter on the branes, and time-reversal is then broken.
ALBERGHI, GIAN LUIGI +2 more
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Journal of High Energy PhysicsThe origin of the baryon asymmetry of the universe remains one of the most pressing open questions in particle physics and cosmology. Electroweak baryogenesis offers an experimentally testable explanation, requiring new sources of CP violation and a ...
Thomas Biekötter +1 more
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, 1994 An overview of baryogenesis in the early Universe is presented. The standard big bang model including big bang nucleosynthesis and inflation is breifly reviewed. Three basic models for baryogenesis will be developed: The ``standard" out-of-equilibrium decay model; the decay of scalar consensates along flat directions in supersymmetric models; and lepto-
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