介子中的胶子自由度

介子中的胶子自由度 Gluonic Degree of Freedom in Mesons 刘朝峰 LIU Zhao\|feng 1 first-author 刘觉平 LIU Jue\|ping 1 武汉大学物理学系,武汉,430072 武汉大学物理学系,武汉,430072 Department of Physics,Wuhan University Department of Physics,Wuhan University 在假定有质量的组分胶子是介子的构成子之一的基础上， 根据 Ｌｏｒｅｎｔｚ 群与 Ｓ Ｕ（ Ｎｃ） 色群的分析，构造了基态 Ｊ Ｐ＝ １－ 介子的波函数， 分析了基态１－ 介子中 ρ±、κ±、ρ０ 、ω和 ф介子的磁矩与自旋结构（即夸克、反夸克与组分胶子对介子自旋的贡献）．得到了关于 ρ±、κ± 介子的磁矩和自旋朗德因子ｇｓ 的限制条件以及关于基态１－ 介子各组成子（夸克、反夸克或组分胶子）所携带的介子自旋的份额ｒ 的限制条件， 并发现胶子对介子自旋的贡献一般是不可忽略的 The non\|perturbative effect of gluons in a bound state is assumed to be simulated by the massive constituent gluons, and then the general wave functions of the usual J P=1 - mesons are constructed to be a superposition of a qq state and qqg state through an analysis of the Lorentz\|group and the SU （N c ） color group representations. Based on this, the magnetic moments as well as the spin structure （i.e. the contributions of quark, antiquark and gluon to the spin of a meson） of ρ ±、κ *± 、ρ 0、 ω and ф mesons are investigated. A constraint condition for the spin Lande g\|factor of the charged 1 - mesons is obtained, and furthermore, a constraint condition for the magnitudes of the contributions of the valence quark, antiquark and the constituent gluon to the spin of a vector meson is then derived on the same basis. The effect of the constituent gluon on the meson spin is found to be significant. 组分胶子 介子自旋结构 介子磁矩 constituent gluon mesonic spin structure mesonic magnetic moment O572.33 1999-03-01 2021-04-01 3