Search for metastable heavy charged particles with large ionisation energy loss in $pp$ collisions at $\sqrt s = 13$ TeV using the ATLAS experiment

Many extensions of the Standard Model predict the existence of charged and heavy long-lived particles, such as R-hadrons. These particles, if produced at the Large Hadron Collider (LHC), should be non-relativistic and are therefore identifiable through the measurement of an anomalously large energy loss in the ATLAS Pixel Detector. The search for heavy long-lived particles using track information in the vicinity of the interaction vertex is sensitive for values of their lifetime in the nanosecond range. The research of metastable and stable R-hadrons with the ATLAS detector using 2015 LHC data is here reported.