Analysis of the ${\frac{1}{2}}^{\pm }$ flavor antitriplet heavy baryon states with QCD sum rules

Abstract

In this article, we study the masses and pole residues of the ${\frac{1}{2}}^{\pm }$ flavor antitriplet heavy baryon states (${\Lambda }_c^{+}$, ${\Xi }_c^{+},{\Xi }_c^0)$ and (${\Lambda }_b^0$, ${\Xi }_b^0,{\Xi }_b^{-})$ by subtracting the contributions from the corresponding ${\frac{1}{2}}^{\mp }$ heavy baryon states with the QCD sum rules, and observe the masses are in good agreement with the experimental data and make reasonable predictions for the unobserved ${\frac{1}{2}}^{-}$ bottom baryon states. Once reasonable values of the pole residues ${\lambda }_{\Lambda }$ and ${\lambda }_{\Xi }$ are obtained, we can take them as basic parameters to study the revelent hadronic processes with the QCD sum rules.

Comments: 11 pages, 16 figures, published version