Investigation of ${\Xi }_c^0$ in a chiral quark model

Abstract

Recently, three new states of ${\Xi }_c^0$ were observed in the invariant mass spectrum of ${\Lambda }_c^{+}{K}^{-}$ by LHCb collaboration. In this work, we use a chiral quark model to investigate these three exited states with the help of Gaussian expansion method both in three-quark structure and in five-quark structure with all possible quantum numbers $I{J}^P=\frac{1}{2}(\frac{1}{2}{)}^{-}$, $\frac{1}{2}(\frac{3}{2}{)}^{-}$, $\frac{1}{2}(\frac{5}{2}{)}^{-}$, $\frac{3}{2}(\frac{1}{2}{)}^{-}$, $\frac{3}{2}(\frac{3}{2}{)}^{-}$ and $\frac{3}{2}(\frac{5}{2}{)}^{-}$ . The calculations shows that the 2$S$ states of ${\Xi }_c^{\prime }(2579{)}^0$ and ${\Xi }_c(2645{)}^0$ are comparable to experimental results; In addition, the resonance states of five-quark configuration are possible candidates of these new states with negative parity by using the real scaling method and their decay width are also given.

9 pages, 5 figures

References in corpus (5)

• Constituent quark model study of the meson spectra
• Quark-model study of few-baryon systems
• The Flavor Structure of the Excited Baryon Spectra from Lattice QCD
• ${\Xi }_c$ and ${\Xi }_b$ excited states within a ${\mathrm{SU}(6)}_{\mathrm{lsf}}\times$HQSS model
• Understanding the newly observed ${\Xi }_c^0$ states through their decays

Cited by in corpus (5)

• An updated review of the new hadron states
• Analysis of $\Omega (2012)$ as a molecule in the chiral quark model
• Strong decays of the low-lying $1P$- and $1D$-wave ${\Sigma }_c$ baryons
• Toward establishing the low-lying $P$-wave excited ${\Sigma }_c$ baryon states
• ${\Xi }_c(3055)$ as a scaling point to establish the excited ${\Xi }_c^{(\prime )}$ family