The $\Lambda$-type P-wave bottom baryon states via the QCD sum rules

Abstract

Our study focuses on the $\Lambda$-type P-wave bottom baryon states with the spin-parity $J^P={\frac{1}{2}}^{-}$, ${\frac{3}{2}}^{-}$. We introduce an explicit P-wave between the two light quarks in the interpolating currents (and the two light quarks are antisymmetric in flavor space, therefore leads to the name $\Lambda$-type baryon) to investigate the ${\Lambda }_b$ and ${\Xi }_b$ states within the framework of the full QCD sum rules. The predicted masses show that the ${\Xi }_b(6087)$ and ${\Xi }_b(6095/6100)$ could to be the P-wave bottom-strange baryon states with the spin-parity $J^P={\frac{1}{2}}^{-}$ and ${\frac{3}{2}}^{-}$, respectively, meanwhile, the ${\Lambda }_b(5912)$ and ${\Lambda }_b(5920)$ could be the P-wave bottom baryon states with the spin-parity $J^P={\frac{1}{2}}^{-}$ and ${\frac{3}{2}}^{-}$, respectively. The ${\Lambda }_b(5920)$ and ${\Xi }_b(6095/6100)$ maybe have two remarkable under-structures or Fock components at least.

19 pages, 12 figures, revised version

References in corpus (19)

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• Identifying the ${\Xi }_b(6100)$ as the $P$-wave bottom baryon of $J^P=3/2^{-}$
• Determination of the possible quantum numbers for the newly observed ${\Xi }_b(6227{)}^0$ state
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Cited by in corpus (5)

• Heavy quark dominance in orbital excitation of singly and doubly heavy baryons
• Heavy-quark dominance and fine structure of excited heavy baryons ${\Sigma }_Q$, ${\Xi }_Q^{\prime }$ and ${\Omega }_Q$
• The fully-light vector tetraquark states with explicit P-wave via the QCD sum rules
• Mass spectra of singly heavy baryons in the relativized quark model with heavy-quark dominance
• Probing the inner structures of the observed ${\Xi }_b$ and ${\Xi }_b^{\prime }$ resonances