The LHC Diphoton excess at 750 GeV in the framework of the Constrained Minimal Supersymmetric Standard Model

Abstract

We examine the observed diphoton excess at 750 GeV in the framework of constrained Minimal Supersymmetric Standard Model (cMSSM). The consistency of cMSSM with the discovery of a 125 GeV Higgs boson and PLANCK/WMAP data for dark matter relic density (RD) demands large mixing in the scalar top (stop) sector and consequently, the existence of a light stop quasi-degenerate with the lightest neutralino. Small decay width due to kinematic and loop suppression of such a stop allows for the existence of stop-antistop bound states (stoponia). Identifying the particular part of cMSSM parameter space consistent with Higgs boson mass as well as RD, we study stoponia as the source of the diphoton excess.

References added

Cited by in corpus (8)

• Interpreting the 750 GeV digamma excess: a review
• The Di-Photon Excess in a Perturbative SUSY Model
• Topological Structure of the Vacuum, Cosmological Constant and Dark Energy
• Enhanced Rates for Diphoton Resonances in the MSSM
• Higgs-Stoponium Mixing Near the Stop-Antistop Threshold
• 750 GeV Diphotons from Supersymmetry with Dirac Gauginos
• Plateau Inflation in $R$-parity Violating MSSM
• Bounds on supersymmetric effective operators from heavy diphoton searches