Conveners
New Ideas in Baryogenesis, Inflation
- Kuver Sinha (University of Oklahoma)
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Kim Berghaus (California Institute of Technology)20/05/2025, 16:30New Ideas in Baryogenesis and Inflation
We show for the first time that warm inflation is feasible with Standard Model (SM) gauge interactions alone. Our model consists of a minimal extension of the SM by a single scalar inflaton field with an axion-like coupling to gluons and a monomial potential. The effects of light fermions, which were previously argued to render warm inflation with the SM impossible, are alleviated by Hubble...
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Yechan Kim (KAIST)20/05/2025, 16:45New Ideas in Baryogenesis and Inflation
We study a novel leptogenesis scenario with the temperature-dependent mass of heavy Majorana neutrino by the wave dark matter to explain the matter-antimatter asymmetry of the Universe. The leptogenesis happens twice in this scenario: the first leptogenesis occurs above the electroweak scale, while the second leptogenesis occurs below it. The sphaleron process converts the lepton asymmetry to...
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Martha Ulloa (University of Florida)20/05/2025, 17:00New Ideas in Baryogenesis and Inflation
Is the Standard Model Charge-Parity (CP) violation ever enough to generate the observed baryon asymmetry? Yes! In this talk, I will discuss our most recent work: baryogenesis together with a dark matter production mechanism that can generate the entire observed baryon asymmetry of the universe using only the CP violation within the Standard Model. We introduced baryogenesis along with a dark...
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Nicolas Sanfaçon (Université de Montréal)20/05/2025, 17:15New Ideas in Baryogenesis and Inflation
Leptogenesis provides a compelling explanation of the baryon asymmetry of the Universe. It uses lepton-number-violating (LNV) decays of heavy right-handed neutrinos, which also generate neutrino masses. These neutrinos can, in fact, be light enough to be produced in low-energy processes. If their LNV decays can be observed, this would directly constrain the parameter space of leptogenesis...
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Tong Ou20/05/2025, 17:30New Ideas in Baryogenesis and Inflation
Baryogenesis is a dynamical out-of-equilibrium process generating the baryon asymmetry of the Universe. Focusing on the mechanism of electroweak baryogenesis, where baryon number is generated through CP-violating scattering of the fermions with the bubble wall during a first-order electroweak phase transition, perturbative calculations for the relevant processes are known to suffer from...
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Kairui Zhang (University of Oklahoma-Norman)20/05/2025, 17:45New Ideas in Baryogenesis and Inflation
We explore flavored resonant leptogenesis embedded in a neutrinophilic 2HDM. Successful leptogenesis is achieved by the very mildly degenerate two heavier right-handed neutrinos~(RHNs) $N_2$ and $N_3$ with a level of only $\Delta M_{32}/M_2 \sim \mathcal{O}(0.1\%-1\%)$. The lightest RHN, with a MeV–GeV mass, lies below the sphaleron freeze-out temperature and is stable, serving as a dark...
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Morgan Cassidy20/05/2025, 18:00New Ideas in Baryogenesis and Inflation
Electroweak Baryogenesis is a commonly studied mechanism to explain the baryon asymmetry of the universe. By introducing a real scalar singlet to the Standard Model, the electroweak phase transition can become strongly first order and satisfy the out-of-equilibrium Sakharov condition. Additionally, contributions from the scalar to the top quark mass term can provide the necessary CP violation....
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Sagnik Mondal (Maryland Center for Fundamental Physics, Department of Physics, University of Maryland, College Park, MD 20742, U.S.A.)20/05/2025, 18:15New Ideas in Baryogenesis and Inflation
Inflaton couplings during warm inflation result in the production of a thermal bath. Thermal friction and fluctuations can dominate the standard de Sitter analogues, resulting in a modified slow-roll scenario with a new source of density fluctuations. Due to issues with back-reaction, it is advantageous to consider inflaton couplings with the thermal bath that are pseudo-scalar in nature,...
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