Leptogenesis and tensor polarisation from a gravitational Chern-Simons term

Simple item page
dc.creatorLyth, David H.
dc.creatorQuimbay, Carlos
dc.creatorRodriguez, Yeinzon
dc.date2005-01-19
dc.date2005-07-27
dc.date.accessioned2026-07-07T10:50:30Z
dc.date.available2026-07-07T10:50:30Z
dc.descriptionWithin 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.
dc.descriptionLatex file. 10 pages. v2: Minor changes in the abstract and the conclusion. References added. Version accepted for publication in Journal of High Energy Physics. v3: Typos corrected. Erratum sent for publication
dc.identifierhttps://arxiv.org/abs/hep-th/0501153
dc.identifierhttp://arxiv.org/abs/hep-th/0501153
dc.identifierJHEP0503:016,2005
dc.identifierdoi:10.1088/1126-6708/2005/03/016
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/184557
dc.subjectHigh Energy Physics - Theory
dc.subjectHigh Energy Physics - Phenomenology
dc.titleLeptogenesis and tensor polarisation from a gravitational Chern-Simons term
dc.typetext

Files

Collections

arXiv