胶球物理简介  

A brief review of the glueball physics

作　　者：乔从丰 汤亮 QIAO Congfengl;TANG Liang(School of Physics,University of Chinese Academy of Sciences,Beijing 100049,China;College of Physics and Information Engineering,Hebei Normal University,Shijiazhuang 050024,China)

机构地区：[1]中国科学院大学物理科学学院,北京100049 [2]河北师范大学物理科学与信息工程学院,河北石家庄050024

出　　处：《辽宁师范大学学报（自然科学版）》2018年第3期305-314,共10页Journal of Liaoning Normal University:Natural Science Edition

基　　金：国家自然科学基金重点资助项目(11635009);国家自然科学基金青年基金资助项目(11605039);河北省自然科学基金资助项目(A2017205124)

摘　　要：胶球是一种由强相互作用规范粒子——胶子——构成的强子,它是由QCD理论预言存在的一类复合粒子.自QCD诞生以来,胶球问题就一直是一个令人十分感兴趣的课题.迄今为止,人们提出了多种理论方案研究胶球问题,例如:格点QCD理论、口袋模型、流管模型、库仑规范理论、AdS/QCD和QCD求和规则等方法.理论上预言最轻的标量胶球(JPC=0++)的质量介于1~2 GeV之间,其他量子数胶球质量会高于2GeV.实验上为寻找胶球态做了大量的工作,除在1.5GeV附近发现存在超出夸克模型预言数量的0++介子态,进而认为这有可能是夸克强子与胶球构成的混合态外,目前尚无其他更明确结论.人们对其他量子数胶球态的研究还非常有限,特别是对于具有奇特量子数oddball胶球的研究更少.然而由于oddball不会与纯夸克强子混合,使得它们在实验探测方面具有特殊的优势.本文简要回顾理论和实验上对胶球的研究,特别对QCD求和规则在oddball研究方面做了较详细地介绍.The glueball is a kind of hadron that is composed of gluons,predicted by the theory of Quantum Chromodynamics.From the advent of QCD,the glueball study turned to be an intriguing research field.Up to now,various of theories were developed for the glueball analysis,such as Lattice QCD,MIT bag model,Flux-tube model,Coulomb gauge theory,AdS/QCD,and QCD sum rules,etc.Meanwhile,agreat deal of effort has been devoted to the search of glueballs in the experiment.However,unfortunately,there has been no firm conclusion yet.In theory,the mass of the lightest scalar glueball（0＋＋）lies in between 1 GeV and 2 GeV,whereas other glueballs,possessing different quantum numbers,should be heavier than 2 GeV.In the experiment,it was found that the number of 0＋＋meson overshoots the prediction of the naive quark model,which might be a smoking gun of scalar glueball,in mixture with conventional meson states.There is very limited research on other glueballs with different quantum numbers,especially the oddballs which have odd quantum numbers and hence do not mix with the quark-anti-quark states.This extraordinary feature makes their discovery in experiment feasible.In this paper,we give a brief review of glueball study,especially the oddball in the framework of QCD sum rules.

关 键 词：胶球 ODDBALL 强相互作用 QCD求和规则 

分 类 号：O572.25[理学—粒子物理与原子核物理]