WIDG Seminar, Hannah Bossi, Yale University, “Radius-dependent Measurements of Jet Suppression in Heavy-ion Collisions with ALICE”

At sufficiently high temperatures, QCD matter becomes a hot and dense deconfined medium known as the quark-gluon plasma (QGP). The QGP medium can be experimentally recreated through the collisions of relativistic heavy-ions at facilities such as the Large Hadron Collider (LHC). The QGP can be studied with hard probes, which study the result of interactions of hard scattered partons with the QGP. These hard scattered partons fragment and hadronize to form a spray of particles called a jet. In heavy-ion collisions, these partons will interact with the QGP, leading to jet energy loss and modification of the internal structure of the jet; a phenomenon called jet quenching. One expected consequence of jet quenching is that jet yields in heavy-ion collisions will be suppressed at fixed transverse momentum (pT). However, jets with different substructures can lose energy differently and can therefore experience different amounts of suppression. One way to isolate these differences is to measure the dependence of the suppression on the jet radius (R) and the jet pT. However, measurements are large R and low pT are limited due to the presence of the large underlying event in heavy-ion collisions. This seminar will focus on one recent measurement of jet suppression which utilizes machine learning techniques in order to perform measurements at large R and low pT.
In-person attendance will be capped at 20 people on a first-come, first-served basis, according to the current Yale policies.
More Information: https://covid19.yale.edu/campus-life/events-gatherings-meetings
Please email the host for the Zoom connection information.
Host:
Tong Liu
Tong.Liu@yale.edu