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Top quark mass calibration for Monte-Carlo event generators
Name
DIS2016_153.pdf
Description
Published version
Size
478.65 KB
Format
Adobe PDF
Checksum (MD5)
304a24e13116fa25c382648ecb1a6e62
Author(s)
Hoang, Andre
Butenschoen, Mathias
Dehnadi, Bahmand
Mateu, Vicent
Preisser, Moritz
Stewart, Iain W.
Date Issued
November 9, 2016
Publisher
Sissa Medialab
Citation
Hoang, Andre, Butenschoen, Mathias, Dehnadi, Bahmand, Mateu, Vicent, Preisser, Moritz et al. 2016. "Top quark mass calibration for Monte-Carlo event generators."
Version
Final published version
Abstract
The most precise top quark mass measurements use kinematic reconstruction methods, determining the top mass parameter of a Monte Carlo event generator, mMCt. Due to the complicated interplay of hadronization and parton shower dynamics in Monte Carlo event generators, relating mMCt 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 mMCt agrees with the MSR mass at the scale 1 GeV within uncertainties, mMCt mMSRt;1GeV, but differs from the pole mass by 900/600MeV.
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
10.22323/1.265.0153
