Luminosity monitoring and calibration of BLM

被引：0

作者：

薛镇 ^{[1
,2
]}

许咨宗 ^{[1
]}

汪晓莲 ^{[1
]}

胡涛 ^{[2
]}

王至勇 ^{[2
]}

傅成栋 ^{[2
]}

鄢文标 ^{[1
]}

吕军光 ^{[2
]}

周莉 ^{[2
]}

蔡啸 ^{[2
]}

俞伯祥 ^{[2
]}

方建 ^{[2
]}

孙希磊 ^{[2
]}

石峰 ^{[2
]}

王志刚 ^{[2
]}

安正华 ^{[2
]}

孙丽君 ^{[2
]}

刘宏邦 ^{[2
]}

章爱武 ^{[2
]}

王晓东 ^{[2
]}

机构：

[1] Laboratory of High Energy Physics,Department of Modern Physics,University of Science and Technology of China

[2] Institute of High Energy Physics,Chinese Academy of Sciences

来源：

中国物理C | 2011年 / 01期

关键词：

luminosity; luminosity monitor; EEMC; Bhabha scattering; cross-section;

D O I：

暂无

中图分类号：

O572.214 [];

学科分类号：

070202 ;

摘要：

The BEPC Luminosity Monitor (BLM) monitors relative luminosity per bunch.The counting rates of gamma photons,which are proportional to the luminosities from the BLM at the center of mass system energy of the ψ(3770) resonance,are obtained with a statistical error of 0.01% and a systematic error of 4.1%.Absolute luminosities are also determined by the BES End-cap Electro-Magnetic Calorimeter (EEMC) using Bhabha events with a statistical error of 2.3% and a systematic error of 3.5%.The calibration constant between the luminosities obtained with the EEMC and the counting rates of the BLM are found to be 0.84±0.03 (×10 26 cm-2.count-1).With the calibration constant,the counting rates of the BLM can be scaled up to absolute luminosities.

引用

页码：1 / 5

页数：5

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