Interpretation of the observed ${\Lambda }_b(6146{)}^0$ and ${\Lambda }_b(6152{)}^0$ states as 1$D$ bottom baryons

Abstract

The measured masses and strong decays of ${\Lambda }_b(6146{)}^0$ and ${\Lambda }_b(6152{)}^0$ required us to decode them as the 1$D$ excited states with $J^P=3/2^{+}$ and $J^P=5/2^{+}$, respectively. Under the suggested assignment, the masses and total decay widths of ${\Lambda }_b(6146{)}^0$ and ${\Lambda }_b(6152{)}^0$ can be explained. As a $J^P=3/2^{+}$ state, the ${\Lambda }_b(6146{)}^0$ should mainly decay into ${\Sigma }_b(5815)\pi$. However, this theoretical result is in contradiction to the measurement since no significant ${\Lambda }_b(6146{)}^0\to {\Sigma }_b(5815{)}^{\pm }{\pi }^{\mp }$ signals were observed by the LHCb. The possible explanations to this difficulty are mentioned. For completeness, we present the prediction of masses and decay widths of other unseen 1$D$ bottom baryons in this work. Our results could provide some important clues for the upcoming experiments.

8 pages, 3 figures, 8 tables, matches published version

References in corpus (8)

• Heavy Baryons in a Quark Model
• Spectroscopy and Regge trajectories of heavy baryons in the relativistic quark-diquark picture
• Assignments of ${\Lambda }_Q$ and ${\Xi }_Q$ baryons in the heavy quark-light diquark picture
• Strong and radiative decays of the low-lying $S$- and $P$-wave singly heavy baryons
• Low-lying charmed and charmed-strange baryon states
• D-wave charmed and bottomed baryons from QCD sum rules
• Canonical interpretation of the newly observed ${\Lambda }_b(6146{)}^0$ and ${\Lambda }_b(6152{)}^0$ via strong decay behaviors
• Regge-like relation and a universal description of heavy-light systems

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• Heavy Flavour Physics and CP Violation at LHCb: a Ten-Year Review
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• Strong decays of the newly observed narrow ${\Omega }_b$ structures
• Strong decays of the low-lying bottom strange baryons
• Systematic analysis of strange single heavy baryons ${\Xi }_c$ and ${\Xi }_b$
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• ${\Lambda }_b(6146{)}^0$ state newly observed by LHCb
• Strong decay properties of single heavy baryons ${\Lambda }_Q$, ${\Sigma }_Q$ and ${\Omega }_Q$
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• 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
• 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 ${\Omega }_Q$
• Construction of Isoscalar $2^{-+}$ Mesonic States Inspired by the $X(2600)$ Discovery
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• Probing the inner structures of the observed ${\Xi }_b$ and ${\Xi }_b^{\prime }$ resonances
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