Search for Supersymmetry in pp Collisions at sqrt(s) = 7 TeV in Events with Two Photons and Missing Transverse Energy

TL;DR

This paper reports a search for supersymmetry in proton-proton collisions at 7 TeV using CMS data, focusing on events with two photons and missing energy, setting new limits on supersymmetric particle masses.

Contribution

It introduces a novel search strategy for GGM supersymmetry with specific event signatures and establishes new exclusion limits on supersymmetric particles.

Findings

No excess events observed at high missing transverse energy.

Upper limits on GGM supersymmetry cross section between 0.3 and 1.1 pb.

Excluded previously inaccessible supersymmetry parameter space.

Abstract

A search for supersymmetry in the context of general gauge-mediated (GGM) breaking with the lightest neutralino as the next-to-lightest supersymmetric particle and the gravitino as the lightest is presented. The data sample corresponds to an integrated luminosity of 36 inverse picobarns recorded by the CMS experiment at the LHC. The search is performed using events containing two or more isolated photons, at least one hadronic jet, and significant missing transverse energy. No excess of events at high missing transverse energy is observed. Upper limits on the signal cross section for GGM supersymmetry between 0.3 and 1.1 pb at the 95% confidence level are determined for a range of squark, gluino, and neutralino masses, excluding supersymmetry parameter space that was inaccessible to previous experiments.