Search for Diphoton Events with Large Missing Transverse Momentum in 7 TeV pp Collision Data with the ATLAS Detector

A search for diphoton events with large missing transverse momentum has been performed using 4.8 fb$^{−1}$ of proton–proton collision data at $\sqrt{s}$ = 7 TeV recorded with the ATLAS detector. No excess of events was observed above the Standard Model prediction and model-dependent 95% confidence level exclusion limits are set. In the context of a generalised model of gauge-mediated supersymmetry breaking with a bino-like lightest neutralino of mass above 50 GeV, gluinos (squarks) below 1.07 TeV (0.91 TeV) are excluded, while a breaking scale $\Lambda$ below 203 TeV is excluded for a minimal model of gauge-mediated supersymmetry breaking. For a specific model with one universal extra dimension, compactification scales 1/$R$ < 1.41 TeV are excluded.