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|a Preisser, Moritz
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|a Butenschön, Mathias
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|a Dehnadi, Bahman
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|a Hoang, Andre
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|a Mateu, Vicent
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|a Stewart, Iain W.
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|a Calibration of the top quark mass for Monte-Carlo event generators
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|b Sissa Medialab,
|c 2021-11-03T14:56:44Z.
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|z Get fulltext
|u https://hdl.handle.net/1721.1/137215
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|a © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). The most precise top quark mass measurements use kinematic reconstruction methods, determining the top mass parameter of a Monte Carlo event generator, mtMC. Due to the complicated interplay of hadronization and parton shower dynamics in Monte Carlo event generators, relating mtMC to field theory masses is a non-trivial task. In this talk we present a calibration procedure to determine this relation using hadron level QCD predictions for 2-Jettiness in e+e- annihilation, an observable which has kinematic top mass sensitivity and has a close relation to the invariant mass of the particles coming from the top decay. The theoretical ingredients of the QCD prediction are explained. Fitting e+e- 2-Jettiness calculations at NLL/NNLL order to PYTHIA 8.205, we find that mtMC agrees with the MSR mass at the scale 1 GeV within uncertainties, mtMC ≃ mtMSR1GeV, but differs from the pole mass by 900/600 MeV.
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|a Article
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|t 10.22323/1.282.0698
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