Research Seminars @ Illinois

View Full Calendar

Tailored for undergraduate researchers, this calendar is a curated list of research seminars at the University of Illinois. Explore the diverse world of research and expand your knowledge through engaging sessions designed to inspire and enlighten.

To have your events added or removed from this calendar, please contact OUR at ugresearch@illinois.edu

Nuclear Physics Seminar - Matthew Hoppesch (UIUC) “Probing new scales of path length-dependent energy loss via a dijet balance measurement in light-ion collisions”

Event Type: Seminar/Symposium
Sponsor: Physics Department
Location: Rhondale Tso Seminar Room, Loomis 236
Date: Sep 29, 2025 1:00 pm
Speaker: Matthew Hoppesch (UIUC)
Contact: Brandy Koebbe
E-Mail: bkoebbe@illinois.edu
Views: 12
Originating Calendar: Physics - Nuclear Physics Seminar; Light-ion collisions provide a new length scale on which to probe the quark-gluon plasma (QGP), since the transverse extent of the overlapping region is much larger than p+Pb but much smaller than Pb+Pb. The presence of parton energy loss in this system is of particular interest, given that this phenomenon was observed in Pb+Pb but not in p+Pb. ATLAS collected an integrated luminosity of 8 1/nb in O+O collisions in July of 2025. In this talk, I will present a recent ATLAS preliminary measurement of the dijet momentum balance (xJ) at center-of-mass energy 5.36 TeV in O+O collisions. The pair-normalized xJ yields indicate that dijets in central O+O events are slightly more imbalanced than in pp. This result provides unique input into understanding the path length dependence of energy loss in high-pT probes transversing the QGP.

link for robots only