Artículo
On different approaches to freeze-in and freeze-out leptogenesis with quasi-degenerate neutrinos
Fecha de publicación:
02/2023
Editorial:
Springer
Revista:
European Physical Journal C: Particles and Fields
ISSN:
1434-6044
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We compare two approaches for determining the generation of lepton asymmetry during production and decay of quasi-degenerate neutrinos, namely the density matrix formalism and a recent proposal which does not involve any counting of neutrino number densities and is based on plugging the resummed propagator in a quantum field theory model for neutrino oscillations. We show numerically and analytically that they are almost equivalent for small mass splittings and also discuss the hierarchical limit. The comparison, performed in a simple scalar toy model, helps to understand several issues that have been discussed in the literature.
Palabras clave:
BEYOND STANDARD MODEL
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Articulos(IATE)
Articulos de INST.DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Articulos de INST.DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Citación
Racker, Juan Diego; On different approaches to freeze-in and freeze-out leptogenesis with quasi-degenerate neutrinos; Springer; European Physical Journal C: Particles and Fields; 83; 2; 2-2023; 1-8
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