奇异粲介子磁偶极衰变宽度的研究  

Research on the magnetic decay width of strange-charmed mesons

作　　者：王文君 冯涛 彭建洪[1] 庞成群 WANG Wenjun;FENG Tao;PENG Jianhong;PANG Chengqun(School of Physics and Electronic Information Engineering,Qinghai Minzu University,Xining 810007,China;School of Physics and Electronic Information Engineering,Qinghai Normal University,Xining 810008,China)

机构地区：[1]青海民族大学物理与电子信息工程学院,青海西宁810007 [2]青海师范大学物理与电子信息工程学院,青海西宁810008

出　　处：《高师理科学刊》2021年第9期36-38,共3页Journal of Science of Teachers＇College and University

基　　金：国家自然科学基金项目(11965016);青海省自然科学基金面上项目(2020XJGH06)。

摘　　要：由于奇异粲介子中S夸克很轻,因此在描述奇异粲介子时需要考虑相对论效应,其相对论效应由自旋轨道耦合项、自旋自旋耦合项、张量项构成.从奇异粲介子的相对论夸克模型出发,在给出介子哈密顿后,推导得出了相对论效应下的薛定谔方程计算公式,并得到了计算奇异粲介子的质量和径向波函数的方程.通过求解方程得到了奇异粲介子的基态波函数并计算了奇异粲介子的磁偶极衰变宽度.结果表明,考虑相对论效应后,奇异粲介子的质量与实验值较为接近,个别磁偶极衰变道的宽度能达到数个keV,研究结果可为未来实验观测奇异粲介子提供参考.Since the S quark in the strange-charmed meson is very light,it is necessary to consider the relativistic effect when describing strange-charmed meson.The relativistic effect is mainly composed of the spin orbit coupling term,the spin-spin coupling term and the tensor term.A relativistic potential model of strange-charmed meson is established based on the quark model of heavy-light meson.After the Hamiltonian is given,the calculation formula of the schrodinger equation under relativistic effects are obtained and the strange-charmed meson′s spectroscopy and radial wave function equation.The wave function is obtained by solving the equation and use it to calculate magnetic dipole decay width.The results show that when consider relativistic effect,the masses of strange-charmed meson are more close to the value of experiments,the width of individual magnetic dipole decay channels can reach several keV.The results can provide reference to observe strange-charmed mesons in the future.

关 键 词：奇异粲介子 磁偶极衰变 波函数 相对论效应 

分 类 号：O572.25[理学—粒子物理与原子核物理]