Search for pair-produced massive coloured scalars in four-jet final states with the ATLAS detector in proton-proton collisions at sqrt(s) = 7 TeV

TL;DR

This paper reports a search for pair-produced massive coloured scalars decaying into four-jet final states using ATLAS data at 7 TeV, setting mass exclusion limits up to 287 GeV.

Contribution

First search for pair-produced coloured scalars in four-jet final states at the LHC, establishing new mass exclusion limits based on ATLAS data.

Findings

No deviation from the Standard Model observed.

Excluded scalar gluon masses from 150 GeV to 287 GeV.

Set cross-section limits for scalar gluon production.

Abstract

A search for pair-produced massive coloured scalar particles decaying to a four-jet final state is performed by the ATLAS experiment at the LHC in proton-proton collisions at sqrt(s) = 7 TeV. The analysed data sample corresponds to an integrated luminosity of 4.6 /fb. No deviation from the Standard Model is observed in the invariant mass spectrum of the two-jet pairs. A limit on the scalar gluon pair production cross-section of 70 pb (10 pb) is obtained at the 95% confidence level for a scalar gluon mass of 150 GeV (350 GeV). Interpreting these results as mass limits on scalar gluons, masses ranging from 150 GeV to 287 GeV are excluded at the 95% confidence level.