The Λ-type P-wave bottom baryon states via the QCD sum rules  

作　　者：辛琦 王志刚 吕菲 Qi Xin;Zhi-Gang Wang;Fei Lü(Department of Physics,North China Electric Power University,Baoding 071003,China;School of Nuclear Science and Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]Department of Physics,North China Electric Power University,Baoding 071003,China [2]School of Nuclear Science and Engineering,North China Electric Power University,Beijing 102206,China

出　　处：《Chinese Physics C》2023年第9期73-85,共13页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(12175068);the Postgraduate Students Innovative Capacity Foundation of Education Department of Hebei Province,China(CXZZBS2023146)。

摘　　要：Our study focuses on the Λ-type P-wave bottom baryon states with spin-parity JP=1/2−, 3/2−. We introduce an explicit P-wave between the two light quarks in the interpolating currents (these light quarks are antisymmetric in the flavor space, thus giving rise to the designation of Λ-type baryon) to investigate the Λb and Ξ_(b) states within the framework of the full QCD sum rules. The predicted masses show that Ξ_(b)(6087) and Ξ_(b)(6095/6100) could be the P-wave bottom-strange baryon states with spin-parity JP=1/2− and 3/2−, respectively;meanwhile, Λb(5912) and Λb(5920) could be the P-wave bottom baryon states with spin-parity JP=1/2− and 3/2−, respectively. Moreover, Λb(5920) and Ξ_(b)(6095/6100) may have two remarkable under-structures or Fock components at least.

关 键 词：bottom baryon states QCD sum rules P-WAVE 

分 类 号：O572.34[理学—粒子物理与原子核物理]