Interpretation of the newly observed ${\Sigma }_b(6097{)}^{\pm }$ and ${\Xi }_b(6227{)}^{-}$ states as the $P$-wave bottom baryons

Abstract

The strong decays of the $P$-wave ${\Sigma }_b$, ${\Xi }_b^{\prime }$ and ${\Omega }_b$ baryons are investigated with a constituent quark model in the $j$-$j$ coupling scheme. The results show that the newly observed ${\Sigma }_b(6097)$ and ${\Xi }_b(6227)$ states by the LHCb collaboration can be assigned as the $\lambda$-mode $P$-wave singly bottom baryons. Given the heavy quark symmetry, both the ${\Sigma }_b(6097)$ and ${\Xi }_b(6227)$ states favor the light spin $j=2$ states with spin-parity numbers $J^P=3/2^{-}$ or $J^P=5/2^{-}$. More $P$-wave singly bottom baryons are most likely to be observed in future experiments for their relatively narrow width.

7 pages. arXiv admin note: text overlap with arXiv:1709.04268