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.
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)
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)。
