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Intercalibration of the barrel electromagnetic calorimeter of the CMS experiment at start-up

  • P. Adzic
  • , R. Alemany-Fernandez
  • , N. Almeida
  • , G. Anagnostou
  • , D. Andelin
  • , M. Anfreville
  • , I. Anicin
  • , Z. Antunovic
  • , R. Arcidiacono
  • , M. W. Arenton
  • , E. Auffray
  • , S. Argiro
  • , A. Askew
  • , O. Atramentov
  • , S. Baccaro
  • , S. Baffioni
  • , M. Balazs
  • , D. Barney
  • , L. M. Barone
  • , A. Bartoloni
  • C. Baty, D. Bandurin, S. Beauceron, W. Bell, R. Benetta, M. Bercher, C. Bernet, U. Berthon, M. Besancon, B. Betev, R. Beuselinck, C. Biino, J. Blaha, P. Bloch, S. Blyth, A. Bornheim, J. Bourotte, A. M. Brett, R. M. Brown, D. Britton, M. Buehler, P. Busson, B. Camanzi, T. Camporesi, E. Carrera, N. Cartiglia, F. Cavallari, M. Cerutti, P. Chang, Y. H. Chang, C. Charlot, E. A. Chen, W. T. Chen, Z. Chen, R. Chipaux, B. C. Choudhary, R. K. Choudhury, D. J.A. Cockerill, C. Combaret, S. Conetti, F. Cossutti, B. Cox, D. G. Cussans, I. Dafinei, D. R. Da Silva Di Calafiori, G. Daskalakis, G. Davatz, A. David, K. Deiters, M. Dejardin, M. Djordjevic, R. Della Negra, G. Della Ricca, D. Del Re, A. De Min, D. Denegri, P. Depasse, J. Descamps, M. Diemoz, E. Di Marco, G. Dissertori, M. Dittmar, L. Djambazov, L. Dobrzynski, S. Drndarevic, J. E. Duboscq, D. Dutta, M. Dzelalija, A. Elliott-Peisert, H. El Mamouni, I. Evangelou, D. L. Evans, B. Fabbro, J. L. Faure, J. Fay, F. Ferri, P. S. Flower, D. Franci, G. Franzoni
  • University of Belgrade
  • Laboratório de Instrumentaçãao e Física Experimental de Partículas
  • University of Milano-Bicocca
  • RWTH Aachen University
  • University of Virginia
  • Institut Pierre Simon Laplace, CNRS and CEA
  • University of Belgrade
  • University of Split
  • University of Turin
  • European Organization for Nuclear Research
  • Florida State University
  • Centro Ricerche Casaccia
  • Ip Paris
  • University of Rome
  • IGFL, Université de Lyon, Université Lyon 1
  • Kansas State University
  • Brunel University London
  • ETH Zurich
  • Imperial College London
  • National Central University
  • CCLRC Rutherford Appleton Laboratory
  • University of Delhi
  • National Taiwan University
  • Bhabha Atomic Research Centre
  • University of Trieste
  • University of Bristol
  • Institute of Nuclear Physics Demokritos
  • Paul Scherrer Institut
  • Cornell University
  • University of Ioannina
  • University of Minnesota Twin Cities

Research output: Contribution to journalArticlepeer-review

Abstract

Calibration of the relative response of the individual channels of the barrel electromagnetic calorimeter of the CMS detector was accomplished, before installation, with cosmic ray muons and test beams. One fourth of the calorimeter was exposed to a beam of high energy electrons and the relative calibration of the channels, the intercalibration, was found to be reproducible to a precision of about 0.3%. Additionally, data were collected with cosmic rays for the entire ECAL barrel during the commissioning phase. By comparing the intercalibration constants obtained with the electron beam data with those from the cosmic ray data, it is demonstrated that the latter provide an intercalibration precision of 1.5% over most of the barrel ECAL. The best intercalibration precision is expected to come from the analysis of events collected in situ during the LHC operation. Using data collected with both electrons and pion beams, several aspects of the intercalibration procedures based on electrons or neutral pions were investigated.

Original languageEnglish
Article numberP10007
JournalJournal of Instrumentation
Volume3
Issue number10
DOIs
Publication statusPublished - 1 Dec 2008

Keywords

  • Calorimeters
  • Large detector systems for particle and astroparticle physics

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