Status of rates and rate equations for thermal leptogenesis
| Autor: | Mikko Laine, Sebastian Mendizabal, Dietrich Bödeker, Andreas Hohenegger, Alberto Salvio, Nora Brambilla, Peter Millington, Mathias Garny, Simone Biondini, Jacopo Ghiglieri, Antonio Vairo |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Nuclear and High Energy Physics
Particle physics Field (physics) media_common.quotation_subject FOS: Physical sciences 01 natural sciences Asymmetry High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences Thermal 010306 general physics media_common Particle Physics - Phenomenology Physics 010308 nuclear & particles physics High Energy Physics::Phenomenology Astronomy and Astrophysics hep-ph Plasma Atomic and Molecular Physics and Optics Universe 3. Good health High Energy Physics - Phenomenology Leptogenesis Antimatter High Energy Physics::Experiment Neutrino |
| Zdroj: | International Journal of Modern Physics A |
| ISSN: | 0217-751X |
| Popis: | In many realizations of leptogenesis, heavy right-handed neutrinos play the main role in the generation of an imbalance between matter and antimatter in the early Universe. Hence, it is relevant to address quantitatively their dynamics in a hot and dense environment by taking into account the various thermal aspects of the problem at hand. The strong washout regime offers an interesting framework to carry out calculations systematically and reduce theoretical uncertainties. Indeed, any matter-antimatter asymmetry generated when the temperature of the hot plasma $T$ exceeds the right-handed neutrino mass scale $M$ is efficiently erased, and one can focus on the temperature window $T \ll M$. We review recent progresses in the thermal field theoretic derivation of the key ingredients for the leptogenesis mechanism: the right-handed neutrino production rate, the CP asymmetry in the heavy-neutrino decays and the washout rates. The derivation of evolution equations for the heavy-neutrino and lepton-asymmetry number densities, their rigorous formulation and applicability are also discussed. 31 pages, 6 figures. Chapter 4 of the review volume "Leptogenesis: Current Challenges for Model Building, Phenomenology and Non-Equilibrium Field Theory" |
| Databáze: | OpenAIRE |
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