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dc.contributor.author
Mosquera, Mercedes Elisa
dc.contributor.author
Civitarese, Enrique Osvaldo
dc.date.available
2017-08-11T22:03:39Z
dc.date.issued
2013-03
dc.identifier.citation
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; EDP Sciences; Astronomy and Astrophysics; 551; 3-2013; 122-130
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/22277
dc.description.abstract
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, 4He, and 7Li, 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
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Primordial Nucleosynthesis
dc.subject
Cosmology: Miscellaneous
dc.subject
Cosmological Parameters
dc.subject.classification
Otras Ciencias Físicas
dc.subject.classification
Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
New cosmological constraints on the variation of fundamental constants: the fine structure constant and the Higgs vacuum expectation value
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-08-04T15:34:42Z
dc.identifier.eissn
1432-0746
dc.journal.volume
551
dc.journal.pagination
122-130
dc.journal.pais
Francia
dc.journal.ciudad
París
dc.description.fil
Fil: Mosquera, Mercedes Elisa. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Civitarese, Enrique Osvaldo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Física; Argentina
dc.journal.title
Astronomy and Astrophysics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/201220615
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2013/03/aa20615-12/aa20615-12.html
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