Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 31: Flavour physics II

T 31.2: Talk

Tuesday, March 16, 2021, 16:15–16:30, Tf

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-flavour 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 momenta 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 analyses such as searches for heavy resonances. Hence, a Monte Carlo based extrapolation is done on the data based flavour tagging calibrations 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. The results for extrapolation of b, c and light jets will be presented for the b-tagging algorithm that was used for the analysis of the Run 2 data by the ATLAS Collaboration.