Glueballs at physical pion mass  

作　　者：陈飞宇 蒋翔宇 陈莹 刘克非 孙伟 杨一玻 Feiyu Chen;Xiangyu Jiang;Ying Chen;Keh-Fei Liu;Wei Sun;Yi-Bo Yang(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;School of Physics Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Department of Physics and Astronomy,University of Kentucky,Lexington,Kentucky 40506,USA;CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Fundamental Physics and Mathematical Sciences,Hangzhou Institute for Advanced Study,UCAS,Hangzhou 310024,China;International Centre for Theoretical Physics Asia-Pacific,Beijing/Hangzhou,China)

机构地区：[1]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [2]School of Physics Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [3]Department of Physics and Astronomy,University of Kentucky,Lexington,Kentucky 40506,USA [4]CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China [5]School of Fundamental Physics and Mathematical Sciences,Hangzhou Institute for Advanced Study,UCAS,Hangzhou 310024,China [6]International Centre for Theoretical Physics Asia-Pacific,Beijing/Hangzhou,China

出　　处：《Chinese Physics C》2023年第6期81-88,共8页中国物理C（英文版）

基　　金：Supported by the Strategic Priority Research Program of Chinese Academy of Sciences(XDB34030300,XDPB15);the National Key Research and Development Program of China(2020YFA0406400);the National Natural Science Foundation of China(NNSFC)under Grants(11935017,12070131001)(CRC 110 by DFG and NNSFC);supported in part by a NSFC-DFG joint grant(12061131006 and SCHA458/22)。

摘　　要：Glueballs are investigated through gluonic operators on two N_(f)=2+1RBC/UKQCD gauge ensembles at the physical pion mass.The statistical errors of glueball correlation functions are considerably reduced through the cluster decomposition error reduction(CDER)method.The Bethe-Salpeter wave functions are obtained for the scalar,tensor,and pseudoscalar glueballs by using spatially extended glueball operators defined through the gauge potential A_(μ)(x)in the Coulomb gauge.These wave functions exhibit similar features of non-relativistic two-gluon systems and are used to optimize the signals of the related correlation functions at the early time regions,where the ground state masses are extracted.These masses are close to those from the quenched approximation and indicate the possible existence of glueballs at the physical point.The resonance feature of glueballs and the mixing with conventional mesons and multi-hadron systems should be considered in a more systematic lattice study.

关 键 词：GLUEBALL lattice QCD exotic hadron state 

分 类 号：O572.243[理学—粒子物理与原子核物理]