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Aachen 2019 – wissenschaftliches Programm

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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.

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