Analysis of the ${1\over2}^{\pm}$ flavor antitriplet heavy baryon states with QCD sum rules

Abstract

In this article, we study the masses and pole residues of the ${1\over2}^{\pm}$ flavor antitriplet heavy baryon states ($\varLambda _{c}^{+}$, $\varXi _{c}^{+},\varXi _{c}^{0})$ and ($\varLambda _{b}^{0}$, $\varXi _{b}^{0},\varXi _{b}^{-})$ by subtracting the contributions from the corresponding ${1\over2}^{\mp}$ heavy baryon states with the QCD sum rules, and observe that the masses are in good agreement with the experimental data and make reasonable predictions for the unobserved ${1\over2}^{-}$ bottom baryon states. Once reasonable values of the pole residues λ _Λ and λ _Ξ are obtained, we can take them as basic parameters to study the relevant hadronic processes with the QCD sum rules.