In-Situ Calibration of the CMS Electromagnetic Calorimeter

Details In-Situ Calibration of the CMS Electromagnetic Calorimeter In-Situ Calibration of the CMS Electromagnetic Calorimeter

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004paun.conf..211f&link_type=abstract

PARTICLES AND THE UNIVERSE. Proceedings of the Eighteenth Lake Louise Winter Institute. Held 16-22 February 2003 in Lake Louise,

Physics

Scientific paper

The in-situ intercalibration of the PbWO4 crystals of the CMS electromagnetic calorimeter will be performed using three techniques: An energy-flow method will be used at startup to intercalibrate to a precision of around 2% within about three hours. The energy/momentum measurement of isolated electrons from W → eν events will then be used to obtain the design goal precision of 0.5% within about two months. Global intercalibration of different regions of the calorimeter and the determination of the absolute energy scale will be performed using energetic electrons from Z→ e+e- events.

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