Unification of Coupling Constants, Dimension six Operators and the   Spectral Action
  We investigate whether inclusion of dimension six terms in the Standard Model lagrangean may cause the unification of the coupling constants at a scale comprised between 10^14 and 10^17 GeV. 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 favoured. 
Agostino Devastato, Fedele Lizzi, Carlos Valcarcel Flores, Dmitri   Vassilevich
hep-ph gr-qc hep-th math-ph math.MP math.QA