项目名称: psi(4040) 的强子跃迁研究
项目编号: No.U1232106
项目类型: 联合基金项目
立项/批准年度: 2013
项目学科: 物理学II
项目作者: 焦健斌
作者单位: 山东大学
项目金额: 60万元
中文摘要: 粲偶素在强相互作用的研究中扮演了非常重要的角色,c-cbar束缚态的衰变为我们研究重味夸克和反夸克之间相互作用的动力学机制提供了理想的实验平台,对发展和完善量子色动力学有着重要的作用,本课题依托北京谱仪III/北京正负电子对撞机II实验,利用其采集的高统计量psi(4040)数据样本,对psi(4040)通过强子跃迁形式衰变至低能量粲偶素的若干衰变模式进行研究,其中,多数的衰变模式还未被之前的实验测量过。借助对此类过程的测量,可以增加我们对psi(4040)衰变模式的了解,完善对粲偶素谱的研究,并有助于更好的理解粲域以上粲偶素的非粲介子衰变机制。
中文关键词: 强衰变;角分布;非对称参数;强子跃迁;BES
英文摘要: The charmonium has played an important role in the study of the strong interaction, the c-cbar bound state provide us a perfect laboratory for studying the heavy quark-antiquark dynamics, that''s vital to the development of quantum chromodynamics. This research is based on psi(4040) data sample which colleted by BESIII/BEPCII experiment. The main goal of it is to study the hadronic transition processes of psi(4040), most of the processes mentioned in this study have never been measured before. The results of this research will enrich our knowledge about the psi(4040) decay, moreover, we will profit from this work in the understanding of charmonium spectroscopy.
英文关键词: strong decay;angular distribution;asymmetry parameter;hadronic transition;BES