How the X(5568) Challenges Our Understanding of QCD  

作　　者：郭奉困 Ulf-G.Mei?ner 邹冰松 

机构地区：[1]Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences [2]Helmholtz-Institut fur Strahlen- und Kernphysik and Bethe Center for Theoretical Physics,Universitat Bonn [3]Institute for Advanced Simulation, Institut fur Kernphysik and Julich Center for Hadron Physics,Forschungszentrum Julich [4]School of Physical Sciences, University of Chinese, Academy of Sciences

出　　处：《Communications in Theoretical Physics》2016年第5期593-595,共3页理论物理通讯（英文版）

基　　金：Supported by DFG and National Natural Science Foundation of China Through Funds Provided to the Sino-German CRC 110"Symmetries;the Emergence of Structure in QCD"(National Natural Science Foundation of China under Grant No.11261130311);the Thousand Talents Plan for Young Professionals;and the Chinese Academy of Sciences President’s International Fellowship Initiative under Grant No.2015VMA076

摘　　要：We discuss the X(5568)particle recently announced by the D0 Collaboration.Several types of models were proposed to explain this structure in the literature.As pointed out by Burns and Swanson(ar Xiv:1603.04366),none of them provides a satisfactory description of the observation.We provide additional arguments using general properties of QCD,and conclude that the observation of the X(5568),if confirmed,poses serious challenges to our understanding of nonperturbative QCD.

关 键 词：exotic hadrons tetraquark 

分 类 号：O572.33[理学—粒子物理与原子核物理]