LHC上重夸克偶素h_c(h_b)与光子伴随产生的研究  

The research of heavy quarkonium h_c(h_b)production in association with a photon at the LHC

作　　者：马政伟 宋昴[1] 李刚[1] 

机构地区：[1]安徽大学物理与材料科学学院,安徽合肥230601

出　　处：《安徽大学学报（自然科学版）》2016年第6期46-50,共5页Journal of Anhui University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(11305001)

摘　　要：应用非相对论量子色动力学理论,对大型强子对撞机（LHC）上重夸克偶素h_c（h_b）与光子伴随产生进行研究.采用协变投影方法,计算pp→hQ＋γ过程的总截面及其p_T微分截面,计算中考虑了Fock态n=~1S_0~8,~1P_1~1对于重夸克偶素h_Q的贡献.从计算结果可以看出：pp→h_c＋γ过程的总截面在合理的参数空间内可以达到8×10~4 pb量级,pp→h_b＋γ过程的总截面在合理的参数空间内可以达到1.5×10~6 pb量级.考虑到LHC的亮度,该过程有可能被LHC探测到.若该过程能够在LHC上进行研究,这将为非相对论量子色动力学提供一个重要的实验支撑.By nonrelativistic QCD（NRQCD） theory, the associated production of prompt heavy quarkonium h,（hb） in association with a photon at the LHC was investigated. The total cross section and PT differential cross section of the processes pp→hQ＋γ were calculated. In our calculation, the contribution of Fock state of n=~1S_0~8,~1P_1~1 to the heavy quarkonium hQ was taken into consideration. From the result, the cross section of the processespp→hc＋γ , in reasonable parameter space, it could reach 8 ×104 pb. As for the processes pp→hb＋γ in reasonable parameter space, it could reach 1. 5 × 106 pb. Given the luminosity of LHC, these processes had the potential that could be tested on the LHC, the experimental research of this process might give a very important support for investigating NRQCD.

关 键 词：非相对论量子色动力学 重夸克偶素 光子 

分 类 号：O572.339[理学—粒子物理与原子核物理]