Intercalibration of the CMS Electromagnetic Calorimeter with Neutral Pion Decays
- Creators
- Gataullin, M.
Abstract
In order to fully exploit the physics reach of the CMS experiment, it will be necessary to perform a precise in situ calibration of the CMS electromagnetic calorimeter. Achieving the design-goal calibration precision of 0.5% will be especially critical for a possible Higgs boson discovery in the two-photon decay channel. In this paper we evaluate the potential of a novel calibration technique that makes use of photon pairs produced in neutral pion decays. We show that 95% of the barrel electromagnetic calorimeter can be calibrated to at least 1% (0.5%) precision after several days (weeks) of data-taking in the luminosity scenario of L = 2∙10^(33) cm^(-2) s^(-1). Furthermore, this calibration technique has been successfully tested in the π^− test beam runs, where the obtained calibration precision of 1% was found to be in good agreement with the Monte Carlo predictions.
Additional Information
© 2009 Elsevier. Available online 21 February 2010. I would like to thank all my colleagues from the CMS ECAL collaboration. This work was supported in part by the U.S. Department of Energy Grant No. DE-FG03-92-ER40701.Additional details
- Eprint ID
- 18736
- DOI
- 10.1016/j.nuclphysbps.2009.10.054
- Resolver ID
- CaltechAUTHORS:20100618-122916778
- DE-FG03-92-ER40701
- U. S. Department of Energy
- Created
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2010-06-22Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field