ARS leptogenesis

Drewes, M.; Garbrecht, B.; Hernández, P.; Kekic, M.; Lopez-Pavon, J.; Racker, J.; Rius, N.; Salvado, J.; Teresi, D.

doi:10.1142/s0217751x18420022

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Journal article

ARS leptogenesis

Drewes, M. Centre for Cosmology, Particle Physics and Phenomenology, Université catholique de Louvain, Louvain-la-Neuve B-1348, Belgium
Garbrecht, B. Technische Universität München, Physik-Department, James-Franck-Straße, 85748 Garching, Germany
Hernández, P. Theory Division, CERN, 1211 Geneve 23, Switzerland
Kekic, M. Instituto de Física Corpuscular, Universidad de Valencia and CSIC, Edificio Institutos Investigación, Catedrático José Beltrán 2, 46980 Spain
Lopez-Pavon, J. Theory Division, CERN, 1211 Geneve 23, Switzerland
Racker, J. Instituto de Astronomía Teórica y Experimental (IATE), Universidad Nacional de Córdoba (UNC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba, Argentina
Rius, N. Instituto de Física Corpuscular, Universidad de Valencia and CSIC, Edificio Institutos Investigación, Catedrático José Beltrán 2, 46980 Spain
Salvado, J. Instituto de Física Corpuscular, Universidad de Valencia and CSIC, Edificio Institutos Investigación, Catedrático José Beltrán 2, 46980 Spain
Teresi, D. Service de Physique Théorique – Université Libre de Bruxelles, Boulevard du Triomphe, CP225, 1050 Brussels, Belgium

2018-2-28

Published in:

International Journal of Modern Physics A. - World Scientific Pub Co Pte Lt. - 2018, vol. 33, no. 05n06, p. 1842002

Nuclear and High Energy Physics

Astronomy and Astrophysics

Atomic and Molecular Physics, and Optics

English We review the current status of the leptogenesis scenario originally proposed by Akhmedov, Rubakov and Smirnov (ARS). It takes place in the parametric regime where the right-handed neutrinos are at the electroweak scale or below and the CP-violating effects are induced by the coherent superposition of different right-handed mass eigenstates. Two main theoretical approaches to derive quantum kinetic equations, the Hamiltonian time evolution as well as the Closed-Time-Path technique are presented, and we discuss their relations. For scenarios with two right-handed neutrinos, we chart the viable parameter space. Both, a Bayesian analysis, that determines the most likely configurations for viable leptogenesis given different variants of flat priors, and a determination of the maximally allowed mixing between the light, mostly left-handed, and heavy, mostly right-handed, neutrino states are discussed. Rephasing invariants are shown to be a useful tool to classify and to understand various distinct contributions to ARS leptogenesis that can dominate in different parametric regimes. While these analyses are carried out for the parametric regime where initial asymmetries are generated predominantly from lepton-number conserving, but flavor violating effects, we also review the contributions from lepton-number violating operators and identify the regions of parameter space where these are relevant.

Language

English

Open access status

green

Identifiers

DOI 10.1142/s0217751x18420022
ISSN 0217-751X

Persistent URL

https://sonar.ch/global/documents/8425

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