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Titulo: (Inglés y Español): Leptogenesis and tensor polarisation from a gravitational Chern-Simons term / Leptogenesis y polarizacion tensorial a partir de un termino gravitacional de Chern-Simons.

Autor: David H. Lyth, Carlos Quimbay, Yeinzon Rodriguez

Tipo de Estudio: Artículo

Título obtenido: PhD in Physics, Lancaster University, United Kingdom

Año de publicación: 2005

Idioma: Inglés

Dirección de correo electrónico: yeinzon@hotmail.com

RESUMEN: 150 -250 palabras

Within an effective field theory derived from string theory, the universal axion has to be coupled to the the gravitational Chern-Simons (gCS) term. During any era when the axion field is varying, the vacuum fluctuation of the gravitational wave amplitude will then be circularly polarised, generating an expectation value for the gCS term. The polarisation may be observable through the Cosmic Microwave Background, and the vacuum expectation value of the gCS term may generate the baryon asymmetry of the Universe. We argue here that such effects cannot be computed without further input from string theory, since the `vacuum' in question is unlikely to be the field-theoretic one.

Palabras clave (español, inglés): Teorias de Chern-Simons,.Teorias clasicas de la gravedad, Modelos de gravedad cuantica, Cosmologia de teorias mas alla del Modelo Estandar / Chern-Simons Theories, Classical theories of Gravity, Models of quantum gravity, Cosmology of theories beyond the SM.
 

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