,Proton Spin from General Colour Symmetry Model

• 作 者: LU Xiao-Fu LI Ying-Chuan WEN Xin-Min
• 机 构: Department of Physics, Sichuan University, Chengdu 610064Institute of Theoretical Physics, Chinese A
• 出 处: 中国物理快报（英文版）
• 发表日期: 2001年4期

The quark wavefunction in a proton has been calculated by using the global colour symmetry model. We find that the property of this wavefunction is closely related to the nonperturbative vacuum configuration. Using the wavefunction we make the calculation of the matrix element of the axial vector current of the quarks in the proton ground state. Its value is found to be 0.17, which is perfectly consistent with 0.23(+6).