Production of higher excited quarkonium pair at the super Z factory  

作　　者：廖其力 蒋军 Qi-Li Liao;Jun Jiang(Chongqing College of Mobile Telecommunications,Chongqing 401520,China;Chongqing Key Laboratory of Public Big Data Security Technology,Chongqing 401520,China;School of Physics,Shandong University,Jinan 250100,China)

机构地区：[1]Chongqing College of Mobile Telecommunications,Chongqing 401520,China [2]Chongqing Key Laboratory of Public Big Data Security Technology,Chongqing 401520,China [3]School of Physics,Shandong University,Jinan 250100,China

出　　处：《Chinese Physics C》2024年第7期45-54,共10页中国物理C（英文版）

基　　金：Supported by the Scientific Research Fund of Chengdu University of Information Technology(KYTZ2022113);the National Key Research and Development Plan of China,Key Project of Cyberspace Security Governance(2022YFB3103103)。

摘　　要：The heavy constituent quark pair of the heavy quarkonium is produced perturbatively and subsequently undergoes hadronization into the bound state non-perturbatively.The production of the heavy quarkonium is essential to testing our understanding of quantum chromodynamics(QCD)in both perturbative and non-perturbative aspects.The electron-positron collider will provide a suitable platform for the precise study of the heavy quarkonium.The higher excited heavy quarkonium may contribute significantly to the ground states,which should be considered for sound estimation.We study the production rates of the higher excited states quarkonium pair in■at the future Z factory under the non-relativistic QCD(NRQCD)framework,where the■represents the color-singlet states■The differential angle distribution of cross sections■is given.We also discuss the uncertainties of cross sections caused by the varying quark masses and the renormalization scaleμ.We show that significant numbers of events for pairs of higher excited state quarkonia can be generated at the super Z factory.

关 键 词：Z boson decays pair of higher excited quarkonia NRQCD D0I:10.1088/1674-1137/ad3c2e 

分 类 号：O572.33[理学—粒子物理与原子核物理]