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Calibration of the top quark mass for Monte-Carlo event generators
Name
ICHEP2016_698.pdf
Description
Published version
Size
475.44 KB
Format
Adobe PDF
Checksum (MD5)
e5f79ef95b632bf2ba153f28c8c65146
Author(s)
Preisser, Moritz
Butenschön, Mathias
Dehnadi, Bahman
Hoang, Andre
Mateu, Vicent
Stewart, Iain W.
Date Issued
February 6, 2017
Publisher
Sissa Medialab
Citation
Preisser, Moritz, Butenschön, Mathias, Dehnadi, Bahman, Hoang, Andre, Mateu, Vicent et al. 2017. "Calibration of the top quark mass for Monte-Carlo event generators."
Version
Final published version
Abstract
© 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.
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
10.22323/1.282.0698
