CMS-PAS-TAU-24-002

CMS-PAS-TAU-24-002
Performance of the high-level hadronic $ \tau $ triggers of the CMS experiment in proton-proton collisions at $ \sqrt{s} = $ 13.6 TeV
CMS Collaboration
2025-10-20

Abstract: The trigger system of the CMS detector is pivotal in the acquisition of data for physics measurements and searches. Studies of final states characterized by hadronic decays of tau leptons require the reconstruction and the identification of genuine tau leptons against quark- and gluon-initiated jets in the trigger system. This is a difficult task, particularly as improvements to the LHC have resulted in more interactions per bunch crossing in recent years. To address this challenge, a series of machine learning algorithms with high identification efficiency and low computational cost have been incorporated into the high-level trigger for hadronically decaying tau leptons: the L2TauNNTag and the online version of DeepTau. In this note, these developments and the trigger performance are summarized using the data collected by the CMS experiment in proton-proton collisions at $ \sqrt{s}= $ 13.6 TeV from the years 2022 and 2023, corresponding to an integrated luminosity of 62 fb$ ^{-1} $.
Links: CDS record (PDF) ; CADI line (restricted) ; These preliminary results are superseded in this paper, Accepted by JINST. The superseded preliminary plots can be found here.

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