摘要
对BESIII电磁量能器(EMC)光子绝对能量刻度进行了的研究。利用蒙特卡罗模拟(MC)单光子事例对MC数据进行刻度;对于真实数据,在MC刻度的基础上,利用ψ'衰变到π0的单举过程进行二次刻度。同时对飞行时间计数器(TOF)能量重建与EMC匹配重建光子能量的情况,也给出了很好的刻度。利用ψ'→γXc1.2过程对刻度结果进行检验,结果表明光子能量测量的误差小于0.5﹪。
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'→π0 X.In BESI-II, 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 .
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
2014年第4期437-442,469,共7页
Nuclear Electronics & Detection Technology
基金
国家自然科学基金资助项目(10975151),(11205180),(11121092)
国家“973”计划基金资助项目(2009CB825200)
关键词
电磁量能器
刻度因子
绝对能量刻度
electromagnetic calorimeter
calibration factor
absolute energy calibration