Speaker
Dr
Luca Di Luzio
(University of Genoa)
Description
I discuss the constraints implied by partial wave unitarity on new physics models explaining the LHC di-photon excess at 750 GeV. I argue that the effective description in terms of the SM supplemented by a single scalar resonance S breaks down at scales of few tens of TeV, where perturbative unitarity is violated due to the large cross-section required in order to fit the γγ signal. Likewise, I show that unitarity arguments can be used to set perturbativity bounds on renormalizable UV completions of the S-effective operators and discuss under which conditions the data can be accommodated within weakly-coupled models.
Author
Dr
Luca Di Luzio
(University of Genoa)
