Heidelberg 2022 – scientific programme

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T: Fachverband Teilchenphysik

T 70: Experimental Methods (general) 3

T 70.4: Talk

Wednesday, March 23, 2022, 17:00–17:15, T-H29

Extrapolation of flavour tagging calibrations to high transverse momenta — Arnulf Quadt, Elizaveta Shabalina, and •Sreelakshmi Sindhu — II. Physikalisches Institut, Georg-August-Universität Göttingen

Identifying jets containing heavy flavoured hadrons can be very beneficial for a variety of analyses and this can be done using flavour tagging algorithms. Currently, these algorithms are calibrated by matching their performance on data to simulation. However, for jets with transverse momentum greater than a few hundred GeV these calibrations do not exist due to statistical limitations. Flavour-tagging information for jets with high transverse momenta can be quite useful for analysis such as search for heavy resonances. Hence, a Monte Carlo based extrapolation of the data based flavour tagging calibrations is done to extend these up to 3 TeV. The extrapolation uncertainties are calculated by propagating the relevant modelling, tracking and jet uncertainties through the tagging algorithm. In this talk, the extrapolation procedure will be explained and the results from my work on the extrapolation uncertainties for charm and light jets will be presented for the b-tagging algorithms (DL1, DL1r) that are used for the analysis of the Run 2 data by the ATLAS Collaboration.