Search for massive colored scalars in four-jet final states in sqrt{s}=7 TeV proton-proton collisions with the ATLAS detector

TL;DR

This paper reports a search for pair-produced scalar particles decaying into four-jet final states in 7 TeV proton-proton collisions, setting mass limits and cross section constraints with no observed deviations from the Standard Model.

Contribution

First search for scalar particles decaying to four jets in 7 TeV collisions, establishing new mass exclusion limits and cross section bounds.

Findings

No deviation from Standard Model observed.

Excluded scalar-gluon masses from 100 to 185 GeV.

Excluded hyperpion masses from 100 to 155 GeV.

Abstract

A search for pair-produced scalar particles decaying to a four-jet final state is presented. The analysis is performed using an integrated luminosity of 34 pb^-1 recorded by the ATLAS detector in 2010. No deviation from the Standard Model is observed. For a scalar mass of 100 GeV (190 GeV) the limit on the scalar gluon pair production cross section at 95% confidence level is 1 nb (0.28 nb). When these results are interpreted as mass limits, scalar-gluons (hyperpions) with masses of 100 to 185 GeV (100 to 155 GeV) are excluded at 95% confidence level with the exception of a mass window of width about 5 GeV (15 GeV) around 140 GeV.