Search for diphoton events with large missing transverse energy in 6.3 fb-1 of ppbar collisions at sqrt(s)=1.96 TeV

TL;DR

This paper searches for diphoton events with large missing transverse energy in proton-antiproton collisions, setting limits on new physics models like supersymmetry and extra dimensions based on data from the Fermilab Tevatron.

Contribution

It provides the first experimental limits on gauge mediated supersymmetry breaking and universal extra dimension models using diphoton plus missing energy events.

Findings

No significant deviation from the standard model observed.

Excluded supersymmetry breaking scale Lambda < 124 TeV.

Excluded compactification radius R_c-1 < 477 GeV.

Abstract

We report a search for diphoton events with large missing transverse energy produced in ppbar collisions at sqrt(s)=1.96 TeV. The data were collected with the D0 detector at the Fermilab Tevatron Collider, and correspond to 6.3 fb-1 of integrated luminosity. The observed missing transverse energy distribution is well described by the standard model prediction, and 95% C.L. limits are derived on two realizations of theories beyond the standard model. In a gauge mediated supersymmetry breaking scenario, the breaking scale Lambda is excluded for Lambda < 124 TeV. In a universal extra dimension model including gravitational decays, the compactification radius R_c is excluded for R_c-1 < 477 GeV.