Chair: A. Vicente
Manuel E. Krauss (Bonn University)
Hints for a new resonance at 750 GeV from ATLAS and CMS have triggered a significant amount of attention and many new models have been considered to explain the excess. Here we focus on several proposed renormalisable weakly-coupled models and revisit results given in the literature. We point out several physically important subtleties which are often missed or neglected. Accordingly, we...
Anibal Medina (IPhT CEA-Saclay)
Using an extra dimensional model as tool, we construct an effective four dimensional action that---via the AdS/CFT correspondence---describes the most general mixing between the only light states in the theory, the radion and the Higgs. Due to conformal invariance, once the Higgs scalar is localized in the bulk of the extra-dimension the coupling between the radion and the Higgs kinetic term...
Christian Gross (Helsinki University)
LHC data in Run 2 hint at the existence of a resonance with the mass around 750 GeV which decays into 2 photons. Microscopic particle physics models fitting the data invoke new fields beyond the Standard Model which carry electric charge. Regardless of the details of the spectrum and couplings among the extra fields, they have a cumulative effect on the running of the electroweak gauge...
Dipan Sengupta (LPSC Grenoble)
We study kinematic distributions that may help characterise the recently observed excess in diphoton events at 750 GeV at the LHC Run 2. Several scenarios are considered, including spin-0 and spin-2 750 GeV resonances that decay directly into photon pairs as well as heavier parent resonances that undergo three-body or cascade decays. We find that combinations of the distributions of the...
Pietro Baratella (SISSA, Trieste)
We revisit the sgoldstino interpretation of the diphoton excess in the context of gauge mediation: we show that the interpretation is viable in a thin, near critical region of the parameter space. This regime gives rise to drastic departures from the standard gauge mediation picture. While the fermion messengers lie in the 10-100 TeV range, some scalar messengers are significantly lighter and...
Alberto Mariotti (VUB)
We propose a simplified model of dark matter with a scalar mediator to accommodate the di-photon excess recently observed by the ATLAS and CMS collaborations. Decays of the resonance into dark matter can easily account for a relatively large width of the scalar resonance, while the magnitude of the total width combined with the constraint on dark matter relic density lead to sharp predictions...