在格点上构造计算胶球质量的新途径(英文)  

New Approach to Constructing the Operator on the Lattice for the Calculation of the Glueball Masses

作　　者：刘大庆[1] 吴济民 陈莹[1] 

机构地区：[1]中国科学院高能物理研究所,北京100039 [2]CCAST(世界实验室,北京100080

出　　处：《高能物理与核物理》2002年第3期222-229,共8页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 ( 1 9991 4 87,1 0 0 75 0 5 1 ) ;国家智能计算系统研究中心 ( 0 0 1 32 )资助~~

摘　　要：发展了一种为了计算胶球质量而构造格点算符的新途径 .基于所选用算符的连续极限与状态量子数JPC两者之间的联系 ,状态的自旋就可以在数值模拟中唯一和直接地被确定下来 .进而 ,这一途径可以被应用于计算任意自旋J的胶球质量 .在淬火近似下 ,给出在SU( 3 )纯规范场中 0 ++态和 2 ++态胶球质量的初步结果 ,它们分别是 1 754 ( 85) ( 86)MeV和 2 4 1 7( 56) ( 1 1 7)MeV .We develop a new approach to constructing the lattice operators for the calculation of the glueball mass, which is based on the connection between the continuum limit of the chosen operator and the quantum number J PC of the state. The spin of the state is then determined uniquely and directly in numerical simulation. Furthermore, the approach can be applied to the calculation of the mass of glueball states with any spin. J. Under the quenched approximation, we present our preliminary results in SU(3) pure gauge theory for the mass of 0 ++ state and 2 ++ state, which are 1754(85)(86) MeV and 2417(56)(117) MeV, respectively.

关 键 词：格点量子色动力学 胶球质量 Wilson算符 计算方法 格点算符 自旋 状态量子数 

分 类 号：O572.21[理学—粒子物理与原子核物理]