氘-金碰撞中J/ψ产生截面随x_F变化的研究

Research on x_F Dependence of J/ψ in d-Au Collision

在不同碰撞质心能量下对氘-金(d-Au)碰撞中J/ψ核吸收效应进行了研究,结果表明,在不同碰撞质心能量下J/ψ核吸收截面随动量分数xF变化趋势明显不同。利用以上结论,计算了美国相对论重离子对撞机(RHIC)能量下J/ψ在氘-金(d-Au)碰撞中与质子-质子(p-p)碰撞中的产生截面比,并与实验数据比较发现,理论结果能很好的解释实验现象。最后,为欧洲大强子对撞机(LHC)实验作了理论预言,理论结果将为即将运行的LHC实验所检验。

In this paper,the J/ψ absorption cross-section is studied at different collision energies.It is shown that the change trends of the absorption cross-section versus xF are different at different collision energies.Especially,there is a visible change while xF≈0 at Large Hadron Collider(LHC) energies.Then,we calculate the ratio of the J/ψ production cross-section in d-Au collisions to those in p-p collisions by using this theory.The theoretical results are in good agreement with the experimental data from Phe...