A search for heavy long-lived multi-charged particles is performed using the ATLAS detector at the LHC. Data collected in 2012 at√s = 8TeV from pp collisions corresponding to an integrated luminosity of 20.3 fb-1 are examined. Particles producing anomalously high ionisation, consistent with long-livedmassive particleswith electric charges from |q| = 2e to |q| = 6e are searched for. No signal candidate events are observed, and 95% confidence level crosssection upper limits are interpreted as lower mass limits for a Drell-Yan productionmodel. The mass limits range between 660 and 785 GeV.
Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Aben, R., Abolins, M., … Zwalinski, L. (2015). Search for heavy long-lived multi-charged particles in pp collisions at √s = 8 TeV using the ATLAS detector. European Physical Journal C, 75(8). https://doi.org/10.1140/epjc/s10052-015-3534-2