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ECAL 2018 refined calibration and Preshower Run 2 performance plots
Many physics analyses using the Compact Muon Solenoid (CMS) detector at the LHC require accurate, high resolution electron and photon energy measurements. Following the excellent performance achieved in Run I at center-of-mass energies of 7 and 8 TeV, the CMS electromagnetic calorimeter (ECAL) is op...
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Lenguaje: | eng |
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2019
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Acceso en línea: | http://cds.cern.ch/record/2701337 |
_version_ | 1780964512550092800 |
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author | CMS Collaboration |
author_facet | CMS Collaboration |
author_sort | CMS Collaboration |
collection | CERN |
description | Many physics analyses using the Compact Muon Solenoid (CMS) detector at the LHC require accurate, high resolution electron and photon energy measurements. Following the excellent performance achieved in Run I at center-of-mass energies of 7 and 8 TeV, the CMS electromagnetic calorimeter (ECAL) is operating at the LHC with proton-proton collisions at 13 TeV center-of-mass energy. The instantaneous luminosity delivered by the LHC during Run II has achieved unprecedented values, using 25 ns bunch spacing. High pileup levels necessitate a retuning of the ECAL readout and trigger thresholds and reconstruction algorithms, to maintain the best possible performance in these more challenging conditions. The energy response of the detector must be precisely calibrated and monitored to achieve and maintain the excellent performance obtained in Run I in terms of energy scale and resolution. A dedicated calibration of each detector channel is performed with physics events exploiting electrons from W and Z boson decays, photons from pi0/eta decays, and from the azimuthally symmetric energy distribution of minimum bias events. This note presents the Preshower run II calibration plots and the refined calibration and excellent performance of the CMS ECAL that were achieved for the CMS 2018 Run II data legacy reprocessing. |
id | cern-2701337 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2019 |
record_format | invenio |
spelling | cern-27013372019-11-12T22:41:26Zhttp://cds.cern.ch/record/2701337engCMS CollaborationECAL 2018 refined calibration and Preshower Run 2 performance plotsDetectors and Experimental TechniquesMany physics analyses using the Compact Muon Solenoid (CMS) detector at the LHC require accurate, high resolution electron and photon energy measurements. Following the excellent performance achieved in Run I at center-of-mass energies of 7 and 8 TeV, the CMS electromagnetic calorimeter (ECAL) is operating at the LHC with proton-proton collisions at 13 TeV center-of-mass energy. The instantaneous luminosity delivered by the LHC during Run II has achieved unprecedented values, using 25 ns bunch spacing. High pileup levels necessitate a retuning of the ECAL readout and trigger thresholds and reconstruction algorithms, to maintain the best possible performance in these more challenging conditions. The energy response of the detector must be precisely calibrated and monitored to achieve and maintain the excellent performance obtained in Run I in terms of energy scale and resolution. A dedicated calibration of each detector channel is performed with physics events exploiting electrons from W and Z boson decays, photons from pi0/eta decays, and from the azimuthally symmetric energy distribution of minimum bias events. This note presents the Preshower run II calibration plots and the refined calibration and excellent performance of the CMS ECAL that were achieved for the CMS 2018 Run II data legacy reprocessing.CMS-DP-2019-038CERN-CMS-DP-2019-038oai:cds.cern.ch:27013372019-11-05 |
spellingShingle | Detectors and Experimental Techniques CMS Collaboration ECAL 2018 refined calibration and Preshower Run 2 performance plots |
title | ECAL 2018 refined calibration and Preshower Run 2 performance plots |
title_full | ECAL 2018 refined calibration and Preshower Run 2 performance plots |
title_fullStr | ECAL 2018 refined calibration and Preshower Run 2 performance plots |
title_full_unstemmed | ECAL 2018 refined calibration and Preshower Run 2 performance plots |
title_short | ECAL 2018 refined calibration and Preshower Run 2 performance plots |
title_sort | ecal 2018 refined calibration and preshower run 2 performance plots |
topic | Detectors and Experimental Techniques |
url | http://cds.cern.ch/record/2701337 |
work_keys_str_mv | AT cmscollaboration ecal2018refinedcalibrationandpreshowerrun2performanceplots |