Search for supersymmetry with jets, missing transverse momentum and at least one hadronically decaying tau lepton in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector

TL;DR

This paper reports a search for supersymmetric particles in proton-proton collisions at 7 TeV using the ATLAS detector, focusing on events with jets, missing transverse momentum, and hadronically decaying tau leptons, but finds no evidence of new physics.

Contribution

It presents the first search for supersymmetry with tau leptons in the final state at 7 TeV, setting new exclusion limits on gauge mediated supersymmetry breaking models.

Findings

No excess above Standard Model background observed.

Supersymmetry production is excluded up to Lambda = 30 TeV for all tan(beta).

Exclusion extends to Lambda = 43 TeV for large tan(beta).

Abstract

A search for production of supersymmetric particles in final states containing jets, missing transverse momentum, and at least one hadronically decaying tau lepton is presented. The data were recorded by the ATLAS experiment in sqrt(s) = 7 TeV proton-proton collisions at the Large Hadron Collider. No excess above the Standard Model background expectation was observed in 2.05 fb-1 of data. The results are interpreted in the context of gauge mediated supersymmetry breaking models with Mmess = 250 TeV, N5 = 3, mu > 0, and Cgrav = 1. The production of supersymmetric particles is excluded at 95% C.L. up to a supersymmetry breaking scale Lambda = 30 Tev, independent of tan(beta), and up to Lambda = 43 TeV for large tan(beta).