Speaker
Prof.
Iain Bertram
(Lancaster University)
Description
Theoretical calculations for jet substructure observables with accuracy beyond leading-logarithm have
recently become available. Such observables are significant not only for probing a new regime of QCD
at a hadron collider, but also for improving the understanding of jet substructure properties that
are used in many searches for physics beyond the Standard Model. In this talk, we discuss a first
measurement of such jet substructure quantities. The soft drop mass is measured in dijet events with
the ATLAS detector at √s=13 TeV, unfolded to particle-level and compared to Monte Carlo simulations.
We also present a measurement of substructure variables in ttbar and inclusive jet events, using data
collected by the ATLAS experiment at √s = 13 TeV. The measurements are performed with large-radius jets.
They are corrected for detector effects, represented as particle-level distributions and are compared
to the predictions of various Monte Carlo event generators. If available, a measurement of jet
substructure observables performed using charged particles, at √s = 13 TeV, is also presented.
New event generator configurations for the modelling of jet production, derived using ATLAS data
will also be presented.
Primary author
Iain Bertram
(Lancaster University)