effect of the variation of the higgs vacuum expectation value upon the deuterium binding energy and primordial abundances of D and 4He.

M.E. MOSQUERA; OSVALDO CIVITARESE

ASTRONOMY AND ASTROPHYSICS

EDP SCIENCES S A

Lugar: amsterdam; Año: 2010 p. 1 - 6

0004-6361

We calculate the constraints on the time variation of theHiggs vacuum expectation value from Big Bang Nucleosynthesis. Starting from the calculation of the deuterium binding-energy,as a function of the pion-mass and using the NN-Reid 93 potential, wecalculate the abundances of primordial D and 4He by modifyingKawano's code. The Higgs vacuum expectation value (v) and the baryon tophoton ratio (eta_B)  enter the calculation as freeparameters. By using the observational data of D and 4He, weset constraints on eta_B and on the variation of v, relativeto a constant value of Lambda_QCD.  Resultsare consistent with null variation in v and gammav_D for theearly universe. We obtained alinear dependence of gammav_D upon v and found that thebest-fit-value of the variation of v is null.