含重夸克偶素五夸克态的夸克势模型研究  

A Study on Pentaquark with Heavy Quarkonium in Quark Potential Model

作　　者：李欣 Li Xin(School of Physical Science and Technology,Southwest University,Chongqing 400700,China)

机构地区：[1]西南大学物理科学与技术学院,重庆400700

出　　处：《科学技术创新》2022年第25期1-4,共4页Scientific and Technological Innovation

摘　　要：随着高能物理实验技术的不断提高,越来越多的含隐粲的强子态被发现,含隐粲的五夸克态:P_(c)(4380),P_(c)(4312),P_(c)(4450)确定为两个窄共振态P_(c)(4440)和P_(c)(4457)的叠加,P_(cs)(4459)等。系统的内部结构以及对应的角动量宇称量子数也存在许多的争议,对于该五夸克系统,采用重子-介子的方式,利用群论构造坐标、自旋、味道、颜色空间函数和满足全反对称性的整体波函数,在组分夸克模型下将波函数通过五体Moshinsky系数转换,利用谐振子基展开。再用变分法求解系统的薛定谔方程得到系统的质量谱。With the improvement of high energy physics experimental techniques,more and more hadron states with hidden charm have been found.The hidden charm pentaquark,P_(c)(4380),P_(c)(4312),P_(c)(4450)determined as two narrow resonance states,P_(c)(4440)and P_(c)(4457),and P_(cs)(4459).Internal structure of the system and the corresponding momentum quantum number are many disputes.We use group theory to construct space,spin,flavor,and color function to satisfy antisymmetry with the baryon-meson structure,and then convert wavefunction through five body Moshinsky coefficient with harmonic wavefunction expansion.Finally,the mass spectrum of the system is obtained by solving the schrodinger equation with variation method.

关 键 词：五夸克 五体Moshinsky系数 组分夸克模型 

分 类 号：O572.331[理学—粒子物理与原子核物理]