Canonical interpretation of the newly observed ${\Lambda }_b(6146{)}^0$ and ${\Lambda }_b(6152{)}^0$ via strong decay behaviors

Abstract

Stimulated by the newly observed ${\Lambda }_b(6146{)}^0$ and ${\Lambda }_b(6152{)}^0$ resonances, we investigate the strong decays of the low-lying singly bottom baryons within the quark pair creation model. Considering their masses and decay modes, we tentatively assign these states as the $\lambda -$ mode ${\Lambda }_b(2S)$, ${\Lambda }_b(1D)$, ${\Sigma }_b(2S)$, and ${\Sigma }_b(1P)$ states, and then estimate their strong decay widths. Compared with the experimental total widths and decay modes measured by the LHCb Collaboration, the ${\Lambda }_b(6146{)}^0$ and ${\Lambda }_b(6152{)}^0$ can be reasonably clarified into the $J^P=5/2^{+}$ and $J^P=3/2^{+}$ ${\Lambda }_b(1D)$ sates respectively, while other canonical assignments are disfavored. Other low-lying bottom states are also presented, where various narrow states may have good potential to be observed in future LHCb experiments.

8 pages, 3 figures

References in corpus (16)

• Heavy Baryons in a Quark Model
• Spectroscopy and Regge trajectories of heavy baryons in the relativistic quark-diquark picture
• Masses of excited heavy baryons in the relativistic quark-diquark picture
• Faddeev study of heavy baryon spectroscopy
• Strong decays of charmed baryons
• 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
• Charmed baryon strong decays in a chiral quark model
• Low-lying charmed and charmed-strange baryon states
• Excited bottom and bottom-strange mesons in the quark model
• Understanding the charmed states recently observed by the LHCb and BaBar Collaborations in the quark model
• Identifying the ${\Xi }_b(6227)$ and ${\Sigma }_b(6097)$ as $P$-wave bottom baryons of $J^P=3/2^{-}$
• Strong Decays of observed ${\Lambda }_c$ Baryons in the ${}^3{P}_0$ Model
• Nature of charmed strange baryons ${\Xi }_c(3055)$ and ${\Xi }_c(3080)$
• Study of $2S$- and $1D$- excitations of observed charmed strange baryons
• Dipion decays of heavy baryons

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