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Constraints on a possible variation of the fine structure constant from galaxy cluster data
(IOP Publishing, 2016-05)
We propose a new method to probe a possible time evolution of the fine structure
constant α from X-ray and Sunyaev-Zel’dovich measurements of the gas mass fraction (fgas) in galaxy clusters. Taking into account a direct ...
New cosmological constraints on the variation of fundamental constants: the fine structure constant and the Higgs vacuum expectation value
(EDP Sciences, 2013-03)
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 ...
Possible cosmological implications in electrodynamics due to variations of the fine structure constant
(Revista Mexicana de Física, 2009)
Helium and deuterium abundances as a test for the time variation of the fine structure constant and the Higgs vacuum expectation value
(IOP Publishing, 2007-12)
We use the semi-analytic method of Esmailzadeh et al (1991 Astrophys. J. 378 504-18) to calculate the abundances of helium and deuterium produced during Big Bang nucleosynthesis assuming the fine structure constant and the ...