Search for Massive Long-lived Highly Ionising Particles with the ATLAS Detector at the LHC

Understand

A search is made for massive long-lived highly ionising particles with the ATLAS experiment at the Large Hadron Collider, using 3.1 pb-1 of pp collision data taken at sqrt(s)=7 TeV.

• The signature of energy loss in the ATLAS inner detector and electromagnetic calorimeter is used.
• No such particles are found and limits on the production cross section for electric charges 6e <= |q| <= 17e and masses 200 GeV <= m <= 1000 GeV are set in the range 1-12 pb for different hypotheses on the production mechanism.