Summing logarithms and factorization for massive quark initiated jets and the Pythia top quark mass
Name
LL2016_066.pdf
Description
Published version
Size
480.17 KB
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Checksum (MD5)
67996fe9e9060cd5ae641cee23ae2c2b
Author(s)
Hoang, Andre
Butenschoen, Mathias
Dehnadi, Bahmand
Mateu, Vicent
Preisser, Moritz
Stewart, Iain W
Date Issued
October 2016
Publisher
Sissa Medialab
Citation
Hoang, Andre, Butenschoen, Mathias, Dehnadi, Bahmand, Mateu, Vicent, Preisser, Moritz et al. 2016. "Summing logarithms and factorization for massive quark initiated jets and the Pythia top quark mass."
Version
Final published version
Abstract
© Copyright owned by the author(s) under the terms of the Creative Commons. 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≃ mtMCmt, IGeVMSR, 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
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DOI of Published Version
https://doi.org/10.22323/1.260.0066
