New cosmological constraints on the variation of fundamental constants: the fine structure constant and the Higgs vacuum expectation value

Aims. We study the time variation of the fine structure constant, α, and the Higgs vacuum expectation value v, during the Big Bang nucleosynthesis (BBN). Methods. We computed primordial abundances of light nuclei produced during the BBN stage by including resonances in the leading reaction rates w...

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Detalles Bibliográficos
Autores principales: Mosquera, Mercedes Elisa, Civitarese, Enrique Osvaldo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Astronómicas
Cosmological parameters
Cosmology: miscellaneous
Primordial nucleosynthesis
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85229
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85229
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Cosmological parameters
Cosmology: miscellaneous
Primordial nucleosynthesis
spellingShingle Ciencias Astronómicas
Cosmological parameters
Cosmology: miscellaneous
Primordial nucleosynthesis
Mosquera, Mercedes Elisa
Civitarese, Enrique Osvaldo
New cosmological constraints on the variation of fundamental constants: the fine structure constant and the Higgs vacuum expectation value
topic_facet Ciencias Astronómicas
Cosmological parameters
Cosmology: miscellaneous
Primordial nucleosynthesis
description Aims. We study the time variation of the fine structure constant, α, and the Higgs vacuum expectation value v, during the Big Bang nucleosynthesis (BBN). Methods. We computed primordial abundances of light nuclei produced during the BBN stage by including resonances in the leading reaction rates which reduce the primordial abundance of beryllium. We performed this calculation considering that α and v may vary during the BBN. Using observable data on deuterium, <SUP>4</SUP>He, and <SUP>7</SUP>Li, we set constraints on the variation of the fundamental constants. Results. Results indicate a null variation of α and v, while the best-fit value for the baryon-to-photon ratio agrees well with the WMAP value. Conclusions. We found that the variation of α is null within 3σ, the variation of v is null within 6σ, and the preferred value of the baryon-to-photon ratio is in good agreement, within 3σ, with the value extracted using the WMAP data. We improve the fits respect to previous works.
format Articulo
Articulo
author Mosquera, Mercedes Elisa
Civitarese, Enrique Osvaldo
author_facet Mosquera, Mercedes Elisa
Civitarese, Enrique Osvaldo
author_sort Mosquera, Mercedes Elisa
title New cosmological constraints on the variation of fundamental constants: the fine structure constant and the Higgs vacuum expectation value
title_short New cosmological constraints on the variation of fundamental constants: the fine structure constant and the Higgs vacuum expectation value
title_full New cosmological constraints on the variation of fundamental constants: the fine structure constant and the Higgs vacuum expectation value
title_fullStr New cosmological constraints on the variation of fundamental constants: the fine structure constant and the Higgs vacuum expectation value
title_full_unstemmed New cosmological constraints on the variation of fundamental constants: the fine structure constant and the Higgs vacuum expectation value
title_sort new cosmological constraints on the variation of fundamental constants: the fine structure constant and the higgs vacuum expectation value
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/85229
work_keys_str_mv AT mosqueramercedeselisa newcosmologicalconstraintsonthevariationoffundamentalconstantsthefinestructureconstantandthehiggsvacuumexpectationvalue
AT civitareseenriqueosvaldo newcosmologicalconstraintsonthevariationoffundamentalconstantsthefinestructureconstantandthehiggsvacuumexpectationvalue
bdutipo_str Repositorios
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