During LHC Run 3, the CMS experiment faces challenging pileup and high event rate conditions. To efficiently select events of interest, CMS utilizes a two-tiered triggering system. This system consists of the hardware-based level-1 trigger (L1T) and the software-based high-level trigger (HLT) that runs on a computing farm. The L1T utilizes coarse calorimeter and muon detector information, while at the HLT, a streamlined event reconstruction using the complete detector information is performed. A critical asset of the experiment is the rapid derivation of alignment and calibration constants for both the HLT and offline reconstruction. To achieve this, a dedicated set of triggers is integrated into the data-taking process. This contribution outlines the CMS alignment and calibration workflows and the interplay between these dedicated triggers and the derivation of calibrations.
Philipp Nattland (Thu,) studied this question.