Top quark mass calibration for Monte-Carlo event generators
Name
DIS2016_153.pdf
Description
Published version
Size
478.65 KB
Format
Unknown
Checksum (MD5)
304a24e13116fa25c382648ecb1a6e62
Author(s)
Hoang, Andre
Butenschoen, Mathias
Dehnadi, Bahmand
Mateu, Vicent
Preisser, Moritz
Stewart, Iain W
Date Issued
November 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.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.22323/1.265.0153
