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T: Fachverband Teilchenphysik
T 82: Flavor-Tagging, Jet-Kalibration
T 82.7: Vortrag
Donnerstag, 28. März 2019, 17:30–17:45, S09
Tau Identification Efficiency Scale Factor Measurement using the Z→ττ Tag & Probe method at ATLAS — •Lino Gerlach, Michel Janus, and Stan Lai — II. Physikalisches Institut, Georg-August-Universität Göttingen
Tau leptons play an important role in many measurements and searches within and beyond the Standard
Model at ATLAS. As these analyses use Monte Carlo generated events for both signal and background
processes, scale factors should be determined to correct Monte Carlo predictions of the tau
identification efficiency.
We present the precision measurement of these scale factors binned in the number of prongs, the
transverse momentum, and the working point of the ID applied to the hadronically decaying tau lepton.
To obtain a high purity sample of hadronically decaying tau leptons, a muon from a leptonically decaying
tau lepton is used to tag Z→τlepτhad events, and the hadronically
decaying tau lepton is then used to measure the identification efficiency and determine the corresponding
scale factors.