New Constraint on the Varying Fine Structure Constant

Details New Constraint on the Varying Fine Structure Constant New Constraint on the Varying Fine Structure Constant

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1241..252n&link_type=abstract

INVISIBLE UNIVERSE: Proceedings of the Conference. AIP Conference Proceedings, Volume 1241, pp. 252-258 (2010).

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Fine Structure, Cosmic Background Radiation, Cosmology, Redshift, Fine And Hyperfine Structure, Background Radiations, Origin And Formation Of The Universe, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies

Scientific paper

We investigate constraints on the time variation of the fine structure constant between the recombination epoch and the present epoch from cosmic microwave background (CMB) in the case other physical constants, namely the electron mass me and the proton mass mp, varies simultaneously. Assuming a relation among the variations of coupling constants which is governed by a single scalar field called the dilaton, the constraint on Δα/α is found to be -8.28×10-3 <Δα/α<1.81×10-3 at 95% confidence level (C.L.) where Δα/α is defined as Δα/α ≡ (αrec-α0)/α0. This result is tighter than the one obtained by considering only the change of α and me.

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