NGT: Physics Performance Evaluation of Continuous Real-Time Calibrations within the CMS High-Level Trigger System

About

**Project Description**: Accurate physics reconstruction of collision events at the LHC relies on precise knowledge of detector conditions at the moment an event is acquired. As these conditions fluctuate during data-taking, calibrations must be derived to account for them. Within the Next Generation Triggers (NGT) project, a novel approach is being tested to derive calibrations for online reconstruction at the High-Level Trigger (HLT) with much higher frequency than current operations. A demonstrator has been commissioned to test the feasibility of this new paradigm for the Phase-2 conditions framework, with the aim of deriving calibrations continuously within a strict 8-hour window while using limited computing resources and maintaining physics quality. This summer student project will focus on a retrospective, comprehensive physics validation of this demonstrator using results collected during the final Run 3 data-taking period. The student will perform a comparative analysis between the conditions derived by the NGT Demonstrator, the standard HLT conditions, and the high-precision Offline conditions which serve as the reference truth. The goal is to quantify improvements in physics object reconstruction and assess triggering efficiencies, to determine if the continuous calibration approach is feasible for Phase-2.

**Supervisor**: Jessica Prendi, Marco Musich

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