【摘要】 将新发表的J/ ψ核吸收截面输入强子和弦级联模型JPCIAE ,计算了2 0 0AGeV/c的P A ,O U ,S U和Pb Pb最小偏畸碰撞中J/ ψ压低因子并与实验作比较 .结果表明 :增大的新截面难以改变核吸收机制不易解释Pb Pb碰撞J/ ψ反常压低局面更多还原

【Abstract】 The enlarged new absorption cross sections of J/ψ by π and ρ were put into the hadron and string cascade model, JPCIAE, and the J/ψ suppression factors in P A, O U, S U and Pb Pb minimum bias collisions at 200 A GeV/ c were calculated with nuclear absorption mechanism only. The results seem to indicate that, with new enlarged cross section it is still hard to change the aspect that nuclear absorption mechanism itself could not easily account for the J/ψ anomalous suppression in Pb Pb collisions.更多还原