• Nuclear, Particle, Astroparticle and Cosmology (NUPAC) Seminars

October 28, 2025 2:00 PM
PAIS 3205

Host:

Sally Seidel

Presenter:

Saheed Oyeniran (UNM)

The quest to uncover physics beyond the Standard Model demands a strategy that connects the analysis of subtle experimental signals to the robust operation and continuous innovation of our experimental tools. This talk will present my research journey thus far, within the ATLAS experiment and beyond. I will begin with my primary objective: the high precision search for New Physics through the study of CP violation in the decays of the B_s meson to the J/psi phi final state.

Achieving this physics goal depends on the excellent operation of the ATLAS detector.  I will therefore detail my work in monitoring the ATLAS Pixel detector in the harsh radiation environment of LHC Run-3, in which I quantify radiation damage by tracking the increase in sensor leakage current. By analyzing this metric as a function of luminosity, temperature, and sensor position, I monitor the detector's health in real time, ensuring the quality of the collider data.

Looking ahead, continued precision searches will require collisions producing increased radiation environments.  This necessitates a new generation of sensors and motivates my preparations to apply Transient Current Technique (TCT) to silicon detectors. Using a pulsed laser to simulate particle tracks, I will characterize features of the electric field in low gain avalanche detectors and other technologies. These studies are relevant to future upgrades to ATLAS and other experiments such as those at the Future Circular Collider and Muon Collider.