Performance of the LHCb muon system

TLDR

The study evaluates the performance and stability of the LHCb Muon system during the 2010 7 TeV data‑taking period. The authors optimized detector settings and performed time calibration using early LHC collisions, then measured particle rates across varying luminosities, compared them to simulation, and evaluated space‑time alignment, chamber efficiency, time resolution, and cluster size. The Muon system met or exceeded specifications, achieving overall efficiency well above design requirements.

Abstract

The performance of the LHCb Muon system and its stability across the full 2010 data taking with LHC running at ps = 7 TeV energy is studied. The optimization of the detector setting and the time calibration performed with the first collisions delivered by LHC is described. Particle rates, measured for the wide range of luminosities and beam operation conditions experienced during the run, are compared with the values expected from simulation. The space and time alignment of the detectors, chamber efficiency, time resolution and cluster size are evaluated. The detector performance is found to be as expected from specifications or better. Notably the overall efficiency is well above the design requirements