Speaker
Moritz Preisser
(University of Vienna)
Description
The lack of knowledge how the top quark mass parameter in Monte-Carlo event
generators (MCs) is related to field theoretically defined mass schemes limits the
theoretical interpretation of the top quark mass measurements based on templates
obtained from direct reconstruction analyses at hadron colliders. In the first part of the talk
I review the conceptual aspects of the problem and argue which classes of field theoretic
heavy quark mass definitions have a close relation to the quark mass parameter
in MCs. In the second part I describe a method to calibrate the top quark MC
mass parameter by fits of MC hadron level predictions for observables with
very strong mass sensitivity to corresponding hadron level QCD predictions.
I demonstrate the approach for thrust in electron positron collisions using
factorization based QCD calculations at NNLL / NLO that account for hadronization
and the complete top mass dependence, and I present concrete numerical results.
Primary author
Moritz Preisser
(University of Vienna)
Co-authors
Andre Hoang
(University of Vienna)
Vicent Mateu Barreda
(University of Vienna)
