Colloquia

On the interpretation of the Top Quark Mass from Reconstruction

by Prof. André Hoang (Vienna University)

Friday, 19 January 2018 from to (Europe/Vienna)
Description
The currently most precise measurements of the top quark mass are obtained from
kinematic reconstruction obtained at hadron colliders. The observables designed to
make these measurements cannot be calculated using analytic methods in QCD and
therefore reply on multipurpose Monte-Carlo event generators. As a consequence,
the interpretation of the measured top quark masses is theoretically difficult and
still an open issue. In my talk I explain the theoretical issues inherent to this problem. 
It is currently also not yet fully understood, up to a conceptual upper bound, how large 
the uncertainty is when one interprets the result as measurements of the pole mass. 
I then explain one approach to shed some light on the interpretation problem using the 
concept of MC calibration with top mass sensitive observables which can be computed 
systematically at hadron level using analytic methods for boosted top quarks.