核力短程部份与长程部份的统一描述

UNIFIED DESCRIPTION OF SHORT RANGE AND LONG RANGE NUCLEAR FORCE

采用相对论性的多体理论方法,在介子云口袋模型的基础上,统一计算了夸克间交换胶子与π介子所给出的核子间相互作用的短程与长程部份.短程部份在扣除了两个核子相对运动动能之后,得到了300MeV左右的“软”排斥心.长程部份得到与单π介子交换位势(OPEP)相同的解析形式,其强度由介子云口袋模型的参数决定.如果取f_π=93MeV,其强度大约比OPEP低30％.

Based on the cloudy bag model,the short range and long range nuclear force due to the exchange of gluons and pions between quarks are calculated is an unified way by using relativistic many-body theory.After subtracting the kinetic energy of the relative motion of two nucleons,the'soft'repulsive core appears in the short range.Its strength is about 300MeV.For the long range part,an explicit formula which is the same as the one-pion-exchange-potential(OPEP)is derived.Its strength is determined by the parameters is the cloudy bag model.If f_π,is chosen to be 93MeV,the strength is 30% lower than that of OPEP.