Physical design of main drift chamber trigger for BES III experiment

被引：0

作者：

Xu, H ^{[1
]}

Liu, ZA

Jin, DP

Wang, DY

Zhao, DX

Guo, YN

机构：

[1] CAS, Inst High Energy Phys, Beijing 100049, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

来源：

HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION | 2005年 / 29卷 / 04期

关键词：

trigger; BES III; MDC;

D O I：

暂无

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

This article describes the design and simulation of the scheme of Main Drift Chamber ( MDC) trigger for BES III (Beijing Spectrometer III). The algorithm of MDC trigger includes 3 steps: track segments finding (TSF), track finding (TF) and trigger condition formation of MDC tracks. These trigger conditions are studied carefully and the trigger parameters are optimized through simulation. Trigger efficiencies vs. p(t), vertex position r-psi and z are presented. Trigger efficiency exceeds 99% for J/psi events and some important physics channels. The rejection of beam-related backgrounds exceeds 99.99% and the rate of cosmic rays is about 18Hz.

引用

页码：376 / 382

页数：7