LHC上J/ψ+一个喷注单举产生中长程矩阵元普适性研究  

Universality of the Long Distance Matrix Elements in the J/ψ+1jet Inclusive Production at the LHC

作　　者：孙立平 Sun Liping(School of Science,Beijing University of Civil Engineering and Architecture,Beijing 102672,China)

机构地区：[1]北京建筑大学理学院,北京102627

出　　处：《石家庄铁道大学学报（自然科学版）》2023年第4期120-124,共5页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家自然科学基金(11905006)。

摘　　要：对于大型强子对撞机(LHC)上J/ψ+一个喷注的单举产生,在非相对论量子色动力学框架下,给出了此产生过程的完整次领头阶修正,其中喷注采用了anti-kt算法。考虑J/ψ不包含在喷注之内的情形,最终得到了此过程的完整截面。计算结果表明,此过程在实验上是可探测的,并且发现对于色八重态长程矩阵元,不同理论组在J/ψ单举产生过程中拟合得到的数值,在J/ψ+一个喷注单举产生的过程中并不一致,这使得进一步检验J/ψ长程矩阵元的拟合成为必要。随着未来J/ψ+一个喷注单举产生的实验数据的出现,可以做一个多过程拟合,从而得到更精确的长程矩阵元。For J/ψ+1jet inclusive production at the LHC,within the non-relativistic QCD(NRQCD)framework,in this paper a full next-to-leading order(NLO)calculation with the anti-kt algorithm for the jet was presented.The J/ψwas considered to be not contained in the jet.The predictions were made for the total cr OS s section for this process.It was found that the process was detectable in the experiment,and the color-octet long distance matrix elements(LDMEs)fitted in the J/ψinclusive production by different groups were not consistent in the+1jet inclusive production process,which might make a reexamination for the fit of the J/ψLDMEs necessary.With the experimental data of J/ψ+1jet inclusive production process in the future,a multi processes fit might be made,then a more precise LDMEs might be extracted.

关 键 词：大型强子对撞机 喷注 非相对论量子色动力学 长程矩阵元 

分 类 号：O572.24[理学—粒子物理与原子核物理]