Unification of coupling constants, dimension 6 operators and the spectral action

Abstract

We investigate whether inclusion of dimension 6 terms in the Standard Model Lagrangian may cause the unification of the coupling constants at a scale comprised between 1014and 1017GeV. Particular choice of the dimension 6 couplings is motivated by the spectral action. Given the theoretical and phenomenological constraints, as well as recent data on the Higgs mass, we find that the unification is indeed possible, with a lower unification scale slightly favored.