Predicting the Higgs mass from Inflation models

Friday April 20, 14:30hs  -  Seminar room

Speaker: Alessio Notari (Universitat de Barcelona)


For a narrow band of values of the top quark and Higgs boson masses, the Standard Model Higgs potential can develop a false minimum at energies of about 10^15-10^16 GeV, where primordial Inflation could have happened.

I will present two mechanisms to achieve a successful transition from Inflation to a radiation dominated era: by adding a Brans-Dicke scalar to gravity or by introducing a hybrid model with a new scalar very weakly coupled to the Higgs. In both cases this can happen only for a narrow window of values for the Higgs mass, of about (126 +- 3) GeV, which has already coincided with the hint of the Higgs boson detection, as reported very recently by the LHC. We discuss the features of the models and point out that they can be further checked with: more precise measurements of the top quark mass, improvement of theoretical uncertainties on the Standard Model RGE equations, and by cosmological observables (especially the tensor-to-scalar ratio) by forthcoming experiments, such as Planck.



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