TY - JOUR
T1 - Calibration of the top quark mass for Monte-Carlo event generators
AU - Butenschön, Mathias
AU - Dehnadi, Bahman
AU - Hoang, André H.
AU - Mateu, Vicent
AU - Preisser, Moritz
AU - Stewart, Iain W.
N1 - Publisher Copyright:
© 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).
PY - 2017/4/19
Y1 - 2017/4/19
N2 - The most precise top quark mass measurements use kinematic reconstruction methods, determining the top mass parameter of a Monte Carlo event generator, m
t
MC. Due to the complicated interplay of hadronization and parton shower dynamics in Monte Carlo event generators, relating m
t
MC 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 m
t
MC agrees with the MSR mass at the scale 1 GeV within uncertainties, m
t
MC ≃ m
t
MSR
1GeV, but differs from the pole mass by 900/600 MeV.
AB - The most precise top quark mass measurements use kinematic reconstruction methods, determining the top mass parameter of a Monte Carlo event generator, m
t
MC. Due to the complicated interplay of hadronization and parton shower dynamics in Monte Carlo event generators, relating m
t
MC 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 m
t
MC agrees with the MSR mass at the scale 1 GeV within uncertainties, m
t
MC ≃ m
t
MSR
1GeV, but differs from the pole mass by 900/600 MeV.
UR - http://www.scopus.com/inward/record.url?scp=85025807710&partnerID=8YFLogxK
U2 - 10.22323/1.282.0698
DO - 10.22323/1.282.0698
M3 - Meeting abstract/Conference paper
SN - 1824-8039
VL - 282
JO - Proceedings of Science (PoS)
JF - Proceedings of Science (PoS)
M1 - 698
T2 - 38th International Conference on High Energy Physics (ICHEP2016)
Y2 - 3 August 2016 through 10 August 2016
ER -