Performance of b jet identification {\$}pp{\$} collisions at {\$}$\backslash $sqrt\textbraceleft s\textbraceright $=${\$} 13 TeV with the ATLAS detector

The efficient identification of jets from bottom quarks (b-jets) is one of the~most important techniques for many physics analyses at the Large Hadron Collider, including studies of the Higgs boson, the top quark, and searches beyond the Standard Model.~ The performance is characterized by b-tagging efficiency (probability to identify a b-jet as such) and the mistag rate (probability to mistakenly accept a non-b-jet). Mistags occur as a result of finite detector resolution, presence of long-lived particles, and material interactions.~ As these effects can be different between the experimental data and simulation, it is important to measure the b-tagging performance in data and derive the correction factors for the simulation.~ I will describe various methods to measure the performance of b jet identification in {\$}pp{\$} collisions~at {\$}$\backslash $sqrt\textbraceleft s\textbraceright $=${\$} 13 TeV with the ATLAS detector.