Determination of the quantum numbers of ${\Sigma }_b(6097{)}^{\pm }$ via their strong decays

Abstract

The progresses in the experimental sector have been the harbinger of the observations of many new hadrons. Very recently, LHCb Collaboration announced the observation of two new ${\Sigma }_b(6097{)}^{\pm }$ states in the ${\Lambda }_b^0{\pi }^{\pm }$ invariant mass distribution, which are considered as the excited states of the ground state ${\Sigma }_b^{(\ast )}$ baryon. Though, almost all of the ground state baryons have been observed, having a limited number of excited states observed so far makes them intriguing. Understanding the properties of the excited baryons improve our knowledge on the strong interaction as well as the nature and internal structures of these baryons. To specify the quantum numbers of the ${\Sigma }_b(6097{)}^{\pm }$ an analysis on their strong decays to ${\Lambda }_b^0$ and ${\pi }^{\pm }$ is performed within the light cone QCD sum rule formalism. To this end, they are considered as possible $1P$ or $2S$ excitation of either the ground state ${\Sigma }_b$ baryon with $J=\frac{1}{2}$ or ${\Sigma }_b^{\ast }$ baryon with $J=\frac{3}{2}$. The corresponding masses are also calculated considering the same scenarios for their quantum numbers. The results of the analyses indicate that the ${\Sigma }_b(6097{)}^{\pm }$ baryons are excited $1P$ baryons having quantum numbers $J^P={\frac{3}{2}}^{-}$.

19 Pages, 3 Figures and 3 Tables

References in corpus (9)

• Observation of a new ${\Xi }_b^{-}$ resonance
• Observation of a new Xi(b) baryon
• Observation of two resonances in the ${\Lambda }_b^0{\pi }^{\pm }$ systems and precise measurement of ${\Sigma }_b^{\pm }$ and ${\Sigma }_b^{\ast \pm }$ properties
• Observation of two new ${\Xi }_b^{-}$ baryon resonances
• Interpretation of the newly observed ${\Sigma }_b(6097{)}^{\pm }$ and ${\Xi }_b(6227{)}^{-}$ states as the $P$-wave bottom baryons
• Assigning the newly reported ${\Sigma }_b(6097)$ as a $P$-wave excited state and predicting its partners
• Strong coupling constants of light pseudoscalar mesons with heavy baryons in QCD
• Identification of the newly observed ${\Sigma }_b(6097{)}^{\pm }$ baryons from their strong decays
• ${\Sigma }_Q{\Lambda }_Q\pi$ Coupling Constant in Light Cone QCD Sum Rules

Cited by in corpus (23)

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• Strong decays of the higher excited ${\Lambda }_Q$ and ${\Sigma }_Q$ baryons
• Interpretation of the newly observed ${\Lambda }_b(6146{)}^0$ and ${\Lambda }_b(6152{)}^0$ states in a chiral quark model
• Decay properties of $P$-wave heavy baryons accompanied by vector mesons within light-cone sum rules
• Universal behavior of mass gaps existing in the single heavy baryon family
• Canonical interpretation of the newly observed ${\Lambda }_b(6146{)}^0$ and ${\Lambda }_b(6152{)}^0$ via strong decay behaviors
• Toward establishing the low-lying $P$-wave ${\Sigma }_b$ states
• Strong decays of the low-lying bottom strange baryons
• Systematic analysis of strange single heavy baryons ${\Xi }_c$ and ${\Xi }_b$
• Spectra and decay properties of ${\Lambda }_b$ and ${\Sigma }_b$ baryons
• Identifying the ${\Xi }_b(6100)$ as the $P$-wave bottom baryon of $J^P=3/2^{-}$
• ${\Lambda }_b(6146{)}^0$ state newly observed by LHCb
• The newly observed ${\Lambda }_b(6072{)}^0$ structure and its $\rho -$mode nonstrange partners
• New ${\Lambda }_b(6072{)}^0$ state as a $2S$ bottom baryon
• The $1D$, $2D$ ${\Xi }_b$ and ${\Lambda }_b$ baryons
• Identifying the ${\Lambda }_b(6146{)}^0$ and ${\Lambda }_b(6152{)}^0$ as $D$-wave bottom baryons
• The $\Lambda$-type P-wave bottom baryon states via the QCD sum rules
• Toward establishing the low-lying $P$-wave excited ${\Sigma }_c$ baryon states
• Strong decays of the low-lying $1P$- and $1D$-wave ${\Sigma }_c$ baryons
• Nucleon resonances with spin $\frac{3}{2}$ and isospin $\frac{1}{2}$
• Spectroscopic properties of $1F$-wave singly bottom baryons
• Baryons and baryoniums in the perspective of QCD sum rules
• Strange pentaquark molecules in QCD sum rules