2023
11/20
OPEN
Date
2023/11/20（Mon）16:00～17:00
Venue
4-go-kan seminar hall and zoom
Speaker
Jesse Thaler
Language
English
Contact
akimasa.ishikawa@kek.jp, wnakano@post.kek.jp
Overview
Quarks and gluons are the fundamental particles behind the strong nuclear force, with an unambiguous meaning in quantum chromodynamics (QCD). Because the strong force confines, though, one cannot see a quark or gluon directly in data from colliders. In this talk, I explain how machine learning enables a robust definition of “quarks” and “gluons” from a purely data-driven perspective. When this definition is applied to jet samples from CMS Open Data, we find that quarks and gluons have a relative scaling exponent of 4/9, in agreement with the ratio of their color charges in QCD.