Excited bottom and bottom-strange mesons in the quark model

Abstract

In order to understand the possible $q\bar{q}$ quark-model assignments of the $B_J(5840)$ and $B_J(5960)$ recently reported by the LHCb Collaboration, we evaluate mass spectra, strong decays, and radiative decays of bottom and bottom-strange mesons in a nonrelativistic quark model. Comparing these predictions with the relevant experimental results, we suggest that the $B_J(5840)$ and $B_J(5960)$ can be identified as the $B(2^1{S}_0)$ and $B(1^3{D}_3)$, respectively, and the $B(5970)$ reported by the CDF Collaboration can be interpreted as the $B(2^3{S}_1)$ or $B(1^3{D}_3)$. Further precise measurements of the width, spin and decay modes of the $B(5970)$ are needed to distinguish these two assignments. These predictions of bottom and bottom-strange mesons can provide useful information to further experimental investigations.

arXiv comment12 pages, 3 figures, version accepted by Phys. Rev. D

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• Triply charmed and bottom baryons in a constituent quark model
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• The analysis of the excited bottom and bottom strange states $B_1(5721)$, $B_2^{\ast }(5747)$, $B_{s1}(5830)$, $B_{s2}^{\ast }(5840)$, $B_J(5840)$ and $B_J(5970)$ in B meson family
• Assignments of the $Y(2040)$, $\rho (1900)$, and $\rho (2150)$ in the quark model
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• Placing the newly observed state $B_J(5840)$ in bottom spectra along with states $B_1(5721)$, $B_2^{\ast }(5747)$, $B_{s1}(5830)$, $B_{2s}^{\ast }(5840)$ and $B_J(5970)$
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• Strong decays of the low-lying doubly bottom baryons
• The assignments of the bottom mesons within the screened potential model and ${}^3{P}_0$ model
• Masses and radiative decay widths of the $D_{s0}^{\ast }(2317)$ and $D_{s1}^{\prime }(2460)$ and their bottom analogs
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• Highly excited $B$, $B_s$ and $B_c$ meson spectroscopy from lattice QCD
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