Energy Flow and Jet Substructure

18 Jul 2018, 16:10
25m
Charpak Amphitheater (Paris)

Charpak Amphitheater

Paris

UPMC (Jussieu) Campus
Talk New Tools

Speaker

Patrick Komiske (Massachusetts Institute of Technology)

Description

I will discuss a set of observables, the Energy Flow Polynomials (EFPs), which form a complete, linear basis for IRC-safe observables. I will demonstrate that, on the problems of quark/gluon discrimination, boosted W tagging, and boosted top tagging, the performance of EFPs with linear classification is comparable to that of complex, modern machine learning techniques. Efficient computation of the EFPs is vital to their practical use, and I will develop novel algorithms that make use of the graph-theoretic interpretation of EFPs to improve their computational complexity over that of an arbitrary N-particle energy correlator. Finally, I will introduce the Energy Flow Moments (EFMs), tensors that allow for all EFPs to be computed in time linear in the multiplicity, and discuss how EFMs can be used to understand redundancies in the energy flow basis.

Primary authors

Patrick Komiske (Massachusetts Institute of Technology) Eric Metodiev (Massachusetts Institute of Technology) Jesse Thaler (MIT)

Presentation Materials