BESⅢ测量Ξ(1530)~-→γΞ~-的蒙特卡洛研究
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摘要
基于BESⅢ合作组的离线软件框架BOSS,利用该合作组产生的1 225 M单举J/Ψ事例,研究在BESⅢ探测器上实现测量到超子辐射稀有衰变过程Ξ(1 530)-→γΞ-的分支比的可能性.以无信号事例的单举J/Ψ事例样本为背景样本,以纯信号蒙特卡罗事例为信号样本,控制信号事例,在分别假设观测到Ξ(1 530)-→γΞ-衰变过程信号显著水平为3σ和5σ的情况下,得到该衰变过程对应的分支比.
Based on BOSS framework of BESⅢ Collaboration,by using the 1 225 Minclusive J/Ψ events produced by BESⅢ data production group,the possibility for measuring the branching fraction ofΞ(1 530)-→γΞ-at BESⅢ was studied.Taking this 1 225 Minclusive J/Ψevents as background sample and exclusive Monte Carlo sample as signal sample,assuming the signal significant to be 3σand 5σby controlling the signal event,the corresponding branching fractions were obtained.
Based on BOSS framework of BESⅢ Collaboration,by using the 1 225 Minclusive J/Ψ events produced by BESⅢ data production group,the possibility for measuring the branching fraction ofΞ(1 530)-→γΞ-at BESⅢ was studied.Taking this 1 225 Minclusive J/Ψevents as background sample and exclusive Monte Carlo sample as signal sample,assuming the signal significant to be 3σand 5σby controlling the signal event,the corresponding branching fractions were obtained.
引文
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[6]李卫东,刘怀民.BES实验离线软件系统[C]//CHEP06进展.孟买:高能物理研究,2006.
[7]Barrand G,Belyaev I,Binko P,et al.GAUDI-A software architecture and framework for building HEP data processing applications[J].Computer Physics Communicatons,2001,140:45-55.
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[14]黄性涛,马连良,王孔森,等.最小二乘法运动学拟合程序设计[J].Chin Phys C,2003(9):27.