Determination of the possible quantum numbers for the newly observed ${\Xi }_b(6227{)}^0$ state

Abstract

The LHCb Collaboration recently reported the observation of a new excited bottom baryon ${\Xi }_b(6227{)}^0$ and announced an improvement in the measurements related to the previously observed ${\Xi }_b(6227{)}^{-}$ state. We conduct an analysis for ${\Xi }_b(6227{)}^0$ state considering it as isospin partner of the ${\Xi }_b(6227{)}^{-}$ resonance and possibly $1P$ or $2S$ excited state with spin $J=\frac{3}{2}$. The corresponding masses for both possibilities have consistent results with the experimental data, indicating that only with the mass sum rules, one can not make exact decision on the nature and quantum numbers of this state. To go further, the decays of these possible excited states to ${\Xi }_b^{-}{\pi }^{+}$ final state are also considered and the relevant strong coupling constants are extracted from the light cone sum rules. The obtained decay width values support the possibility of ${\Xi }_b(6227{)}^0$ to be the $1P$ excited state of ${\Xi }_b(5945{)}^0$ baryon.

13 Pages, 2 Figures and 1 Table

References in corpus (14)

• Heavy Baryons in a Quark Model
• Masses of excited heavy baryons in the relativistic quark-diquark picture
• Towards an understanding of heavy baryon spectroscopy
• Strong and radiative decays of the low-lying $S$- and $P$-wave singly heavy baryons
• Low-lying charmed and charmed-strange baryon states
• Analysis of the $1/2^{-}$ and $3/2^{-}$ heavy and doubly heavy baryon states with QCD sum rules
• Observation of a new Xi(b) baryon
• D-wave charmed and bottomed baryons from QCD sum rules
• Towards NNLO Accuracy in the QCD Sum Rule for the Kaon Distribution Amplitude
• ${\Omega }_c\gamma \to {\Omega }_c^{\ast }$ transition in lattice QCD
• Strong coupling constants of light pseudoscalar mesons with heavy baryons in QCD
• Study of $P$-wave excitations of observed charmed strange baryons
• ${\Xi }_c$ and ${\Xi }_b$ excited states within a ${\mathrm{SU}(6)}_{\mathrm{lsf}}\times$HQSS model
• Study of $2S$- and $1D$- excitations of observed charmed strange baryons

Cited by in corpus (8)

• An updated review of the new hadron states
• Systematic analysis of strange single heavy baryons ${\Xi }_c$ and ${\Xi }_b$
• Predicted ${\Xi }_b(6087{)}^0$ and further predictions
• Strong decays of singly heavy baryons from a chiral effective theory of diquarks
• Magnetic moment of the ${\Xi }_b(6227)$ as a molecular pentaquark state
• The $\Lambda$-type P-wave bottom baryon states via the QCD sum rules
• Chiral effective theory of scalar and vector diquarks revisited
• Baryons and baryoniums in the perspective of QCD sum rules