Speaker
Hongbo Liao
(Chinese Academy of Sciences (CN))
Description
Photons and electrons behave similarly in the electromagnetic calorimeter at CMS. However, a key distinguishing feature lies in the presence of signals detected in the tracker. To enhance the discrimination between these two particles and reduce contamination in analyses involving photons in the final state, two complementary electron veto methods are investigated. One method focuses on maximizing signal efficiency, while the other prioritizes minimizing the fake rate. This study utilizes Z → µµγ events to obtain a very pure sample of final-state radiated photons, enabling precise measurement of electron veto efficiencies across different categories at CMS.
Author
Hongbo Liao
(Chinese Academy of Sciences (CN))
