Speaker
Description
Tau leptons are used in a range of important ATLAS physics analyses, including the measurement of the SM Higgs boson coupling to fermions, searches for Higgs boson partners, and heavy resonances decaying into pairs of tau leptons. Events for these analyses are provided by a number of single and di-tau triggers including event topological requirements or the requirement of additional objects at the first level trigger.
To cope with the new conditions in Run 3, the first level calorimeter trigger is upgraded and new multi-variate techniques in the high level tau trigger are optimised to control the rates and keep efficiencies high. The ATLAS tau trigger improvements foreseen in Run 3 will be presented, including both the role of the ATLAS calorimeter in the tau identification at the first and high trigger levels, as well as details of new multi-variate techniques used in the fast or precision tracking developed to maintain high performance in high pile-up conditions.
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