Events at Physics

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Events on Friday, May 10th, 2024

Academic Calendar
Final Exams
Abstract: *Note: actual end time may vary.* URL:
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Preliminary Exam
Application of geometric deeping learning in charged-particle track reconstruction in the ATLAS ITk
Time: 9:00 am - 11:00 am
Speaker: Tuan Pham, Physics Graduate Student
Abstract: The reconstruction of charged-particle trajectories, ranking amongst the most computationally demanding tasks in particle collider experiments, such as the ATLAS experiment at CERN, plays an essential role in any High-Energy Physics program, as it determines the quality of particle identification, kinematic measurement, vertex finding, lepton reconstruction, jet flavor tagging, and other downstream tasks. The upcoming High Luminosity phase of the Large Hadron Collider (HL-LHC) represents a steep increase in the average number of proton-proton interactions and hence in the computing resources required for offline track reconstruction of the ATLAS Inner Tracker (ITk). As such, track pattern recognition algorithms based on Graph Neural Networks (GNNs) have been demonstrated as a promising approach to these challenges. We present a novel algorithm developed for track reconstruction in silicon detectors based on a number of deep learning techniques including GNN architectures. Using detector simulation of collision events associated with the production of a top quark pair on the latest version of ITk geometry under HL-LHC conditions, we demonstrate the performance of our algorithm, and compare to that of the tracking algorithm currently used in ATLAS on a range of important physics metrics, including reconstruction efficiency, and track parameter resolution. Finally, we discuss the algorithm's computational performance and optimisations that reduce computing costs, as well as our effort to integrate into the ATLAS analysis software for full-chain testing and production.
Host: Sau Lan Wu
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Graduation Event
Graduation Celebration Event
Time: 3:00 pm - 5:00 pm
Place: 2241 Chamberlin
Speaker: various
Abstract: Come celebrate and congratulate our 2024 graduates from both the undergraduate and Ph.D. Programs! We will celebrate the Ph.D. graduates from 3:00 - 3:30, enjoy treats and ice cream from 3:30 - 4:00, and then celebrate the undergraduates from 4:00 - 5:00. Please RSVP at
Host: Sharon Kahn and Evan Heintz
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Academic Calendar
Graduate School Spring 2024: Master&#39;s degree deadline
Time: 4:00 pm - 5:00 pm
Abstract: CONTACT: 262-2433,
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Academic Calendar
Commencement: Doctoral &amp; Medical Professional
Time: 5:30 pm - 12:00 am
Abstract: URL:
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