原子核物理评论
原子覈物理評論
원자핵물리평론
Nuclear Physics Review
2014年
2期
142-146
,共5页
光生过程%轻矢量介子%相对论重离子碰撞
光生過程%輕矢量介子%相對論重離子踫撞
광생과정%경시량개자%상대론중리자팽당
photoproduction process%light vector meson%relativistic heavy ion collision
计算了相对论重离子碰撞中轻矢量介子(ρ，ω和?)的光生过程。基于窄-宽近似，严格推导了相对论重离子碰撞中ρ，ω和?半弹性和非弹性光生过程的遍举和单举横截面。从数值结果可以看出对于p-p碰撞，光生过程的贡献是不重要的，但是对于pT>2.5 GeV Au-Au碰撞和pT>3 GeV Pb-Pb碰撞，轻矢量介子光生过程的贡献是明显的。
計算瞭相對論重離子踫撞中輕矢量介子(ρ，ω和?)的光生過程。基于窄-寬近似，嚴格推導瞭相對論重離子踫撞中ρ，ω和?半彈性和非彈性光生過程的遍舉和單舉橫截麵。從數值結果可以看齣對于p-p踫撞，光生過程的貢獻是不重要的，但是對于pT>2.5 GeV Au-Au踫撞和pT>3 GeV Pb-Pb踫撞，輕矢量介子光生過程的貢獻是明顯的。
계산료상대론중리자팽당중경시량개자(ρ，ω화?)적광생과정。기우착-관근사，엄격추도료상대론중리자팽당중ρ，ω화?반탄성화비탄성광생과정적편거화단거횡절면。종수치결과가이간출대우p-p팽당，광생과정적공헌시불중요적，단시대우pT>2.5 GeV Au-Au팽당화pT>3 GeV Pb-Pb팽당，경시량개자광생과정적공헌시명현적。
We calculate the photoproduction processes of light vector meson(ρ,ωand?) in heavy ion collisions. Based on the narrow-width approximation, we rigorously derive the exclusive and inclusive cross sections of ρ, ω and ? produced by the semielastic and inelastic photoproduction processes in relativistic heavy ion collisions. The numerical results indicate that contribution of photoproduction processes of light vector meson is not prominent for p-p collisions, but the contribution becomes evident for pT>2.5 GeV in Au-Au collisions and pT>3 GeV in Pb-Pb collisions.
