Particle-antiparticle asymmetries from annihilations.
Phys Rev Lett
; 113(18): 181601, 2014 Oct 31.
Article
en En
| MEDLINE
| ID: mdl-25396359
ABSTRACT
An extensively studied mechanism to create particle-antiparticle asymmetries is the out-of-equilibrium and CP violating decay of a heavy particle. We, instead, examine how asymmetries can arise purely from 2â2 annihilations rather than from the usual 1â2 decays and inverse decays. We review the general conditions on the reaction rates that arise from S-matrix unitarity and CPT invariance, and show how these are implemented in the context of a simple toy model. We formulate the Boltzmann equations for this model, and present an example solution.
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Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Año:
2014
Tipo del documento:
Article
País de afiliación:
Australia