for a genuine , with misidentification rates of $\approx$0.2 and 1% for quark or gluon jets. Electrons and muons misidentified as a are suppressed via criteria specifically developed for this purpose that are based on the consistency of information from the tracker, calorimeters, and muon detectors [@Sirunyan:2018pgf].

=800 The dominant background in the [$\tauh\tauh$]{}final state originates from misidentification of jets as candidates, mainly in SM events exclusively comprising jets produced through the strong interaction of quantum chromodynamics (QCD). These are referred to as QCD multijet events in what follows. To further improve the suppression of this background while retaining high signal efficiency, we have pursued a new approach for isolation in the [$\tauh\tauh$]{}analysis that is based upon the application of a DNN that is fed information about the properties of PF candidates within an isolation cone with ${\ensuremath{\Delta R}\xspace}< 0.5$ around the candidate. We refer to this as “Deep Particle Flow" (DeepPF) isolation. Charged PF candidates consistent with having originated from the PV, photon candidates, and neutral hadron candidates with $\pt > 0.5$, 1, and 1.25, respectively, provide the inputs to the DeepPF algorithm. The list of observables incorporated for each PF candidate includes its relative to the jet, ${\ensuremath{\Delta 