Joint DLNP Seminar

On 25 January 2016, at 11.00 am in the DLNP Conference Hall a seminar “The compatibility of the LHC data with a scalar with a mass around 270 GeV and its possible connection to the X(750) excess” will be held.

Speaker: Prof. Bruce Mellado

Abstract

The first run of the LHC saw the discovery of a Higgs boson, a particle that is consistent with the SM hypothesis. The field has been re-energized by an excess in the di-photon spectrum around 750 GeV reported by the ATLAS and CMS collaborations. In addition, there are a number of excesses in Run 1 ATLAS and CMS results, which can be interpreted as being due to the existence of heavy scalar particle. Using a minimalistic model, we can predict the kinematics of these final states and compare the prediction against data directly. A statistical combination of these results shows that a best fit point is found for a heavy scalar having a mass of 272+12-9 GeV. This result has been quantified as a three-sigma effect. The possibility of embedding these excesses, into a 2HDM, with H(270) and A(750), and the phenomenologicalimplications are discussed.