Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at √s = 7 TeV
The energy calibration and resolution of the electromagnetic calorimeter (ECAL) of the CMS detector have been determined using proton-proton collision data from LHC operation in 2010 and 2011 at a centre-of-mass energy of √s = 7 TeV with integrated luminosities of about 5fbinv. Crucial aspects of de...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2019
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| Online Access: | https://hdl.handle.net/1721.1/121614 |
| _version_ | 1826198381369753600 |
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| author | Apyan, Aram Bauer, Gerry P Busza, Wit Butz, Erik M. Cali, Ivan Amos Chan, M. Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Kim, Y. Klute, Markus Lai, Y. S. Levin, A. Luckey Jr, P David Ma, T. Paus, Christoph M. E. Ralph, Duncan Kelley Roland, Christof E Roland, Gunther M Stephans, George S. F. Stockli, F. Sumorok, Konstanty C Sung, K. Velicanu, D. Wolf, Roger Wyslouch, Boleslaw Yang, M. Yilmaz, Yetkin Yoon, A. S. Zanetti, Marco Wyslouch, Victoria CMS Collaboration Nahn, Steven |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Apyan, Aram Bauer, Gerry P Busza, Wit Butz, Erik M. Cali, Ivan Amos Chan, M. Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Kim, Y. Klute, Markus Lai, Y. S. Levin, A. Luckey Jr, P David Ma, T. Paus, Christoph M. E. Ralph, Duncan Kelley Roland, Christof E Roland, Gunther M Stephans, George S. F. Stockli, F. Sumorok, Konstanty C Sung, K. Velicanu, D. Wolf, Roger Wyslouch, Boleslaw Yang, M. Yilmaz, Yetkin Yoon, A. S. Zanetti, Marco Wyslouch, Victoria CMS Collaboration Nahn, Steven |
| author_sort | Apyan, Aram |
| collection | MIT |
| description | The energy calibration and resolution of the electromagnetic calorimeter (ECAL) of the CMS detector have been determined using proton-proton collision data from LHC operation in 2010 and 2011 at a centre-of-mass energy of √s = 7 TeV with integrated luminosities of about 5fbinv. Crucial aspects of detector operation, such as the environmental stability, alignment, and synchronization, are presented. The in-situ calibration procedures are discussed in detail and include the maintenance of the calibration in the challenging radiation environment inside the CMS detector. The energy resolution for electrons from Z-boson decays is better than 2% in the central region of the ECAL barrel (for pseudorapidity |η| < 0.8) and is 2-5% elsewhere. The derived energy resolution for photons from 125 GeV Higgs boson decays varies across the barrel from 1.1% to 2.6% and from 2.2% to 5% in the endcaps. The calibration of the absolute energy is determined from Ze→+e - decays to a precision of 0.4% in the barrel and 0.8% in the endcaps. |
| first_indexed | 2024-09-23T11:03:59Z |
| format | Article |
| id | mit-1721.1/121614 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:03:59Z |
| publishDate | 2019 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/1216142023-02-26T02:11:01Z Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at √s = 7 TeV Apyan, Aram Bauer, Gerry P Busza, Wit Butz, Erik M. Cali, Ivan Amos Chan, M. Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Kim, Y. Klute, Markus Lai, Y. S. Levin, A. Luckey Jr, P David Ma, T. Paus, Christoph M. E. Ralph, Duncan Kelley Roland, Christof E Roland, Gunther M Stephans, George S. F. Stockli, F. Sumorok, Konstanty C Sung, K. Velicanu, D. Wolf, Roger Wyslouch, Boleslaw Yang, M. Yilmaz, Yetkin Yoon, A. S. Zanetti, Marco Wyslouch, Victoria CMS Collaboration Nahn, Steven Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Massachusetts Institute of Technology. Laboratory for Nuclear Science The energy calibration and resolution of the electromagnetic calorimeter (ECAL) of the CMS detector have been determined using proton-proton collision data from LHC operation in 2010 and 2011 at a centre-of-mass energy of √s = 7 TeV with integrated luminosities of about 5fbinv. Crucial aspects of detector operation, such as the environmental stability, alignment, and synchronization, are presented. The in-situ calibration procedures are discussed in detail and include the maintenance of the calibration in the challenging radiation environment inside the CMS detector. The energy resolution for electrons from Z-boson decays is better than 2% in the central region of the ECAL barrel (for pseudorapidity |η| < 0.8) and is 2-5% elsewhere. The derived energy resolution for photons from 125 GeV Higgs boson decays varies across the barrel from 1.1% to 2.6% and from 2.2% to 5% in the endcaps. The calibration of the absolute energy is determined from Ze→+e - decays to a precision of 0.4% in the barrel and 0.8% in the endcaps. 2019-07-12T17:50:01Z 2019-07-12T17:50:01Z 2013-09 2013-06 2019-05-21T12:42:01Z Article http://purl.org/eprint/type/JournalArticle 1748-0221 https://hdl.handle.net/1721.1/121614 Chatrchyan, S. et al. "Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at √s = 7 TeV." Journal of Instrumentation 5 (September 2013): P09009 © 2013 CERN for the benefit of the CMS collaboration en http://dx.doi.org/10.1088/1748-0221/8/09/P09009 Journal of Instrumentation Creative Commons Attribution 3.0 unported license https://creativecommons.org/licenses/by/3.0/ application/pdf IOP Publishing IOP Publishing |
| spellingShingle | Apyan, Aram Bauer, Gerry P Busza, Wit Butz, Erik M. Cali, Ivan Amos Chan, M. Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Kim, Y. Klute, Markus Lai, Y. S. Levin, A. Luckey Jr, P David Ma, T. Paus, Christoph M. E. Ralph, Duncan Kelley Roland, Christof E Roland, Gunther M Stephans, George S. F. Stockli, F. Sumorok, Konstanty C Sung, K. Velicanu, D. Wolf, Roger Wyslouch, Boleslaw Yang, M. Yilmaz, Yetkin Yoon, A. S. Zanetti, Marco Wyslouch, Victoria CMS Collaboration Nahn, Steven Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at √s = 7 TeV |
| title | Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at √s = 7 TeV |
| title_full | Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at √s = 7 TeV |
| title_fullStr | Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at √s = 7 TeV |
| title_full_unstemmed | Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at √s = 7 TeV |
| title_short | Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at √s = 7 TeV |
| title_sort | energy calibration and resolution of the cms electromagnetic calorimeter in pp collisions at √s 7 tev |
| url | https://hdl.handle.net/1721.1/121614 |
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