Time variation of the electron mass in the early universe and the Barrow-Magueijo model

CLAUDIA G. SCOCCOLA; MERCEDES E. MOSQUERA; SUSANA J. LANDAU; HECTOR VUCETICH

ASTROPHYSICAL JOURNAL

Chicago University Press

Año: 2008 vol. 681 p. 737 - 746

0004-637X

We put limits on the time variation of the electron mass in the earlyuniverse using observational primordial abundances of $De$, $He$ and $Li$, recent data from the Cosmic Microwave Background andthe 2dFGRS power spectrum.  Furthermore, we use these constraintstogether with other astronomical and geophysical bounds from the lateuniverse to test Barrow-Magueijo´s model for the variation in$m_e$.  From our analysis we obtain  $-0.615 < Gomega/c^4 < -0.045 $ (3$sigma$interval) in disagreement with the result obtained in the originalpaper.