Mass spectra and wave functions of the doubly heavy baryons with J^P=1^+ heavy diquark cores  

作　　者：Qiang Li Chao-Hsi Chang Si-Xue Qin Guo-Li Wang 李强;张肇西;秦思学;王国利(School of Physical Science and Technology,Northwestern Polytechnical University,Xi'an 710072,China;Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,19A Yuquan Road,Beijing 100049,China;CCAST(World Laboratory),P.O.Box 8730,Beijing 100190,China;Department of Physics,Chongqing University,Chongqing 401331,China;Department of Physics,Hebei University,Baoding 071002,China)

机构地区：[1]School of Physical Science and Technology,Northwestern Polytechnical University,Xi'an 710072,China [2]Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China [3]School of Physical Sciences,University of Chinese Academy of Sciences,19A Yuquan Road,Beijing 100049,China [4]CCAST(World Laboratory),P.O.Box 8730,Beijing 100190,China [5]Department of Physics,Chongqing University,Chongqing 401331,China [6]Department of Physics,Hebei University,Baoding 071002,China

出　　处：《Chinese Physics C》2020年第1期25-38,共14页中国物理C（英文版）

基　　金：Supported in part by the National Natural Science Foundation of China(NSFC)(11745006,11535002,11575048,11675239,11805024,11821505);supported by the Key Research Program of Frontier Sciences,CAS,(QYZDY-SSW-SYS006);the China Postdoctoral Science Foundation(2018M641487);the Fundamental Research Funds for the Central Universities(G2019KY05110)

摘　　要：Mass spectra and wave functions of the doubly heavy baryons are computed assuming that the two heavy quarks inside a baryon form a compact heavy'diquark core'in a color anti-triplet,and bind with the remaining light quark into a colorless baryon.The two reduced two-body problems are described by the relativistic Bethe-Salpeter equations(BSEs)with the relevant QCD inspired kernels.We focus on the doubly heavy baryons with 1^+heavy diquark cores.After solving BSEs in the instantaneous approximation,we present the mass spectra and the relativistic wave functions of the diquark cores,and of the low-lying baryon states J^P=(1/2)^+and(3/2)^+with flavors(ccq)(bcq)and(bbq).A comparison with other approaches is also made.Mass spectra and wave functions of the doubly heavy baryons are computed assuming that the two heavy quarks inside a baryon form a compact heavy ’diquark core’ in a color anti-triplet,and bind with the remaining light quark into a colorless baryon.The two reduced two-body problems are described by the relativistic Bethe-Salpeter equations(BSEs) with the relevant QCD inspired kernels.We focus on the doubly heavy baryons with 1^+ heavy diquark cores.After solving BSEs in the instantaneous approximation,we present the mass spectra and the relativistic wave functions of the diquark cores,and of the low-lying baryon states J^P=(1/2)^+ and(3/2)^+ with flavors(ccq)(bcq)and(bbq).A comparison with other approaches is also made.

关 键 词：doubly heavy baryon Bethe-Salpeter equation mass spectra 

分 类 号：O572.3[理学—粒子物理与原子核物理]