Conversion of Goldstone bosons into gravitons in anisotropic cosmology

The gravitational chiral anomaly makes possible the conversion of a Goldstone boson into a graviton in a background gravitational field. We show that the interaction Lagrangian for this process does not vanish if and only if the background metric has a nonvanishing Weyl tensor, i.e., if it is not co...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Harari, D.D., Mazzitelli, F.D.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_05562821_v42_n8_p2632_Harari
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_05562821_v42_n8_p2632_Harari
record_format dspace
spelling todo:paper_05562821_v42_n8_p2632_Harari2023-10-03T15:35:21Z Conversion of Goldstone bosons into gravitons in anisotropic cosmology Harari, D.D. Mazzitelli, F.D. The gravitational chiral anomaly makes possible the conversion of a Goldstone boson into a graviton in a background gravitational field. We show that the interaction Lagrangian for this process does not vanish if and only if the background metric has a nonvanishing Weyl tensor, i.e., if it is not conformally flat. No conversion takes place in an isotropic expanding universe. We evaluate the probability for the conversion of Goldstone bosons into gravitons in Bianchi type-I background metrics, the simplest anisotropic cosmological backgrounds. © 1990 The American Physical Society. Fil:Harari, D.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mazzitelli, F.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_05562821_v42_n8_p2632_Harari
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The gravitational chiral anomaly makes possible the conversion of a Goldstone boson into a graviton in a background gravitational field. We show that the interaction Lagrangian for this process does not vanish if and only if the background metric has a nonvanishing Weyl tensor, i.e., if it is not conformally flat. No conversion takes place in an isotropic expanding universe. We evaluate the probability for the conversion of Goldstone bosons into gravitons in Bianchi type-I background metrics, the simplest anisotropic cosmological backgrounds. © 1990 The American Physical Society.
format JOUR
author Harari, D.D.
Mazzitelli, F.D.
spellingShingle Harari, D.D.
Mazzitelli, F.D.
Conversion of Goldstone bosons into gravitons in anisotropic cosmology
author_facet Harari, D.D.
Mazzitelli, F.D.
author_sort Harari, D.D.
title Conversion of Goldstone bosons into gravitons in anisotropic cosmology
title_short Conversion of Goldstone bosons into gravitons in anisotropic cosmology
title_full Conversion of Goldstone bosons into gravitons in anisotropic cosmology
title_fullStr Conversion of Goldstone bosons into gravitons in anisotropic cosmology
title_full_unstemmed Conversion of Goldstone bosons into gravitons in anisotropic cosmology
title_sort conversion of goldstone bosons into gravitons in anisotropic cosmology
url http://hdl.handle.net/20.500.12110/paper_05562821_v42_n8_p2632_Harari
work_keys_str_mv AT hararidd conversionofgoldstonebosonsintogravitonsinanisotropiccosmology
AT mazzitellifd conversionofgoldstonebosonsintogravitonsinanisotropiccosmology
_version_ 1807316492629311488

Ejemplares similares