SEMINAR - Higgslike dilaton

Friday February 1st 2013, 2:30 pm - Sala de graus II

Speaker: Brando Bellazzini (Padova - Saclay)

Abstract: I will examine the possibility that the recently discovered 125 GeV higgs-like resonance actually corresponds to a dilaton: the Goldstone boson of scale invariance spontaneously broken at a scale f.

Comparing to LHC data we find that a dilaton can reproduce the observed couplings of the new resonance as long as f~v , the weak scale. The more difficult task is to keep the mass of the dilaton light compared to the dynamical scale ~4pi f of the theory. The mass of the dilaton can only be lowered at the price of some percent level (or worse) tuning and/or additional dynamical assumptions. In particular, one needs to suppress the contribution of the condensate to the vacuum energy which would lead to a large dilaton quartic coupling.

 

 

We use own and third-party cookies to improve our services by analyzing your browsing habits. If you continue browsing, we will consider that you allow us to use them. You can change the settings or get more information on our "Cookies policy".

I accept cookies from this site.