Search for new phenomena in final states with large jet multiplicities and missing transverse momentum using sqrt(s)=7 TeV pp collisions with the ATLAS detector

TL;DR

This paper reports a search for new particles decaying into six or more jets with missing transverse momentum using 7 TeV proton-proton collision data from ATLAS, finding no evidence for physics beyond the Standard Model.

Contribution

It introduces a novel analysis of high jet multiplicity events with missing energy, extending previous constraints on supersymmetry models.

Findings

No evidence of new phenomena was observed.

The analysis sets new limits on supersymmetry parameter space.

Data-driven background estimation techniques were employed.

Abstract

Results are presented of a search for any particle(s) decaying to six or more jets in association with missing transverse momentum. The search is performed using 1.34 fb^-1 of sqrt(s)=7 TeV proton-proton collisions recorded by the ATLAS detector during 2011. Data-driven techniques are used to determine the backgrounds in kinematic regions that require at least six, seven or eight jets, well beyond the multiplicities required in previous analyses. No evidence is found for physics beyond the Standard Model. The results are interpreted in the context of a supersymmetry model (MSUGRA/CMSSM) where they extend previous constraints.