10:00–11:00 am
Please Join us:
Emily Smith’s PhD Thesis Defense
Monday, October 30 at 10:00 AM CDT
A GLOBAL VIEW OF JETS WITH THE ATLAS DETECTOR: FROM HARDWARE TRIGGERS TO PRECISION MEASUREMENTS AND BEYOND
This thesis presents substantial work done on the ATLAS calorimeter hardware trigger upgrades and the results of two analysis which are complementary and all show the importance of understanding the hadronic final state in ATLAS at a global level, both to enable a thorough understanding of the Standard Model and for searches of physics beyond the Standard Model.
The work on the ATLAS hardware trigger encompasses significant contributions to the commissioning of the new module the global Feature Extractor (gFEX). This includes the full development of the gFEX Detector Control Systems, contributions to the custom operating system used in gFEX, and additional significant contributions to custom software written to interface with the gFEX firmware. The gFEX is now installed in ATLAS and triggering on real physics data in Run 3, which is ongoing.
The two analyses documented in this thesis were performed using 139 inverse fb of 13 TeV data taken with the ATLAS detector during Run 2. A search for supersymmetric partners of the Standard Model electroweak gauge bosons is presented first, showing the significant gains in sensitivity possible by utilizing the high branching fractions of the fully hadronic final state. The precision measurement of Lund multiplicities in dijet events helps to constrain Monte Carlo models, and highlight import aspects missing in our current models, such as effects from double-soft emissions.
Committee Members:
David Miller (Chair)
Abigail Vieregg
LianTao Wang
Scott Wakely
Emily will be a postdoctoral Lederman fellow at Fermilab starting in January 2024.