WIDG Seminar, Jingjing Pan, Yale, “Measuring a New Class of Jet Observables with Neural Network Based Unfolding”

Event time: 
Tuesday, April 19, 2022 - 3:00pm to 4:00pm
Wright Lab WNSL, WL-216 (Conference Room) See map
272 Whitney Avenue
New Haven, CT 06511

Event description: 

Jets are collimated sprays of hadrons produced in high energy collider experiments, such as
the LHC and RHIC. Jets play an important role in many searches for new physics, and provide an experimental window into the real time dynamics of hadronization, namely the confinement of asymptotically free quarks and gluons into hadrons. With the advent of a new class of theoretical observables, so called energy correlators, that probe the energy flow within jets, it has recently becomes possible, at least in theory, to directly “image” the confinement transition. In this talk, we will discuss the major challenges of realizing this measurement experimentally, and introduce a number of new techniques that will be required to achieve this goal. We first show that the angular resolution necessary can only be achieved using tracking information, and we perform the first measurement of “track functions” that describe the conversion of quarks and gluons into the electrically charged hadrons seen by trackers. We then show that radically new ways of unfolding data are required for these new observables, and show how this can be achieved using novel neural network based approaches.
Tong Liu