Quark and gluon jets in the Lund plane

by Gregory Soyez (IPhT, CEA Saclay)

Friday 3 Jun 2022, 13:00 → 15:00 Europe/Zurich

4/3-006 - TH Conference Room (CERN)

Lund diagrams have a long history as a useful concept when
discussing resummations and parton showers. I will discuss this in the
first part of the talk and show that it is possible to promote the
concept to a practical construction applicable to jets. In the second
part of the talk, I will show that these reconstructed "Lund planes"
have natural applications in all areas of jet substructure physics,
providing a clear understanding of the underlying physics concepts in
all cases. For the third and main part of the talk, I will focus on one
application, namely discriminating quark-initiated jets from
gluon-initiated jets, introducing two new approaches: one analytic,
based on perturbative QCD, and one using Deep Learning methods.
 

lund.pdf