Study of absolute photon energy calibration for the BESⅢ EMC

Chun Guang Mu, Chun Xiu Liu, Feng Cai Ma, Jian Ming Bian

Research output: Contribution to journalArticle

Abstract

The photon absolute energy calibration of BESIII Electromagnetic Calorimeter (EMC) is investigated. Using Monte Carlo (MC) single photons, we give the calibration factors for MC simulation data. On the basis of MC calibration, we give the second calibration for real data by using the inclusive process of ψ'→π0X. In BESIII, the photon energy can be reconstructed by the matching between the Time-of-Flight counters (TOF) and EMC energy deposits. In this case, the corresponding photon absolute energy calibrations are also studied. The results show that the measuring precision is about 0.5% for the photons from ψ'→γXc1.2.

Original languageEnglish (US)
Pages (from-to)437-442 and 469
JournalHedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology
Volume34
Issue number4
StatePublished - Apr 1 2014

Keywords

  • Absolute energy calibration
  • Calibration factor
  • Electromagnetic calorimeter

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