Performance of the CMS electromagnetic calorimeter in the LHC Run II.
Vazzoler F. per la Collaborazione CMS
I - Fisica nucleare e subnucleare
Aula 32C-3 - Mercoledì 19 h 09:00 - 13:00
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Many physics analyses using the CMS detector require accurate, high resolution electron and photon energy measurements. The CMS electromagnetic calorimeter is operating at the LHC with pp collisions at 13 TeV CM energy and a number of collisions per bunch-crossing (pileup) of 60 interactions. These high pileup levels necessitate retuning the readout, trigger thresholds and reconstruction algorithms while the energy response must be precisely calibrated and monitored to maintain excellent performance in terms of energy scale and resolution. This talk describes the calorimeter ageing, the calibration and the monitoring strategies, as well as performance during LHC Run II.