3-8 July 2016
The University of Melbourne
Australia/Melbourne timezone

The NMSSM lives - with the 750 GeV diphoton excess

5 Jul 2016, 15:40
20m
Alice Hoy Room 225 ()

Alice Hoy Room 225

Talk SUSY Models SUSY Models

Speaker

Jong Soo Kim (IFT Madrid)

Description

We propose an NMSSM scenario that can explain the excess in the diphoton spectrum at 750 GeV recently observed by ATLAS and CMS. We show that in a certain limit with a very light pseudoscalar one can reproduce the experimental results without invoking exotic matter. The 750 GeV excess is produced by two resonant heavy Higgs bosons with masses ~750 GeV, that subsequently decay to two light pseudoscalars. Each of these decays to collimated photon pairs that appear as a single photon in the electromagnetic calorimeter. A mass gap between heavy Higgses mimics a large width of the 750 GeV peak. The production mechanism, containing a strong component via initial b-quarks, ameliorates a possible tension with 8 TeV data compared to other production modes. We also discuss other constraints, in particular from low energy experiments. Finally, we discuss possible methods that could distinguish our proposal from other physics models describing the diphoton excess in the Run-II of the LHC.

Primary author

Krzysztof Rolbiecki (University of Warsaw)

Co-authors

Florian Domingo (IFT Madrid) Jong Soo Kim (IFT Madrid) Sven Heinemeyer (CSIC (Santander, ES))

Presentation Materials