Precision electromagnetic calorimetry at the energy frontier: CMS ECAL at LHC Run 2

• DOI: 10.48550/arxiv.1510.02745
• Publication Date: 2015-01-01
• Authors: A. Massironi
• Keywords: Frontier

The CMS electromagnetic calorimeter (ECAL) is a high-resolution, hermetic, and homogeneous made of 75,848 scintillating lead tungstate crystals. Following the discovery Higgs boson, ECAL at forefront precision measurements search for new physics in data from LHC, which recently began producing collisions unprecedented energy 13 TeV. exceptional ECAL, as well its timing performance, are invaluable tools LHC Run 2. excellent performance relies on precise calibration maintained over time, despite severe irradiation conditions. A set inter-calibration procedures using different channels carried out regular intervals to normalize differences crystal light transparency photodetector response between channels, can change due accumulated radiation. In this talk we present reconstruction algorithms strategies aim maintain, even improve, under challenging conditions