K0s重建及其寿命测量在BESⅡ上的研究

来源 :高能物理与核物理 | 被引量 : 0次 | 上传用户：xamchendehui

【摘要】

：

在BESⅡ上利用Bhabha,dimu事例确定了BEPC束流对撞中心位置,并以此为初级顶点研究了次级顶点的重建,改进了原有次级顶点重建程序,在此基础上选择J/ψ→k0sk*0→K±ππ+π-事

【作者】

：

王喆袁野张长春

【机构】

：

中国科学院高能物理所

【出处】

：

高能物理与核物理

【发表日期】

：

2004年期

【关键词】

：

初级顶点次级顶点寿命测量

【基金项目】

：

国家自然科学基金;

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论文部分内容阅读

在BESⅡ上利用Bhabha,dimu事例确定了BEPC束流对撞中心位置,并以此为初级顶点研究了次级顶点的重建,改进了原有次级顶点重建程序,在此基础上选择J/ψ→k0sk*0→K±ππ+π-事例,测量了K0s的寿命,并利用50MJ/ψ数据测量了K0s的单举质量谱,最后还利用MC研究了K0s质量的1C拟合.

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K0s重建及其寿命测量在BESⅡ上的研究

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