Speaker
Tom Appelquist
Description
I will describe a very simple model accommodating the reported 750 GeV diphoton excess seen in the first 13-TeV run of the LHC. It leads to testable predictions, in particular for di-lepton production, at higher integrated luminosity. A new gauge sector with its own SU(2) symmetry group is appended to the minimal standard model. A new complex doublet scalar field provides mass for the heavy vectors and describes the 750-GeV resonance. A new global U(1) symmetry plays a key role, and current precision-electroweak constraints are respected. An adequate rate for the diphoton signals, with resonant production via photon fusion, requires the VEV of the new scalar field to be no larger than the electroweak scale. This in turn requires the new heavy vectors to have sub-TeV masses and be relatively strongly coupled.
