Studies of charmed strange baryons in the $\Lambda D$ final state at Belle

Abstract

We report the discovery of ${\Xi }_c(3055{)}^0$, observed by its decay into the final state $\Lambda D^0$, and present the first observation and evidence of the decays of ${\Xi }_c(3055{)}^{+}$ and ${\Xi }_c(3080{)}^{+}$ into $\Lambda D^{+}$. We also perform a combined analysis of the $\Lambda D^{+}$ with the ${\Sigma }_c^{++}{K}^{-}$ and ${\Sigma }_c^{\ast ++}{K}^{-}$ decay modes to measure the ratios of branching fractions, masses and widths with improved accuracy. We measure the ratios of branching fractions $\mathcal{B}({\Xi }_c(3055{)}^{+}\to \Lambda D^{+})/\mathcal{B}({\Xi }_c(3055{)}^{+}\to {\Sigma }_c^{++}{K}^{-})=5.09\pm 1.01\pm 0.76$, $\mathcal{B}({\Xi }_c(3080{)}^{+}\to \Lambda D^{+})/\mathcal{B}({\Xi }_c(3080{)}^{+}\to {\Sigma }_c^{++}{K}^{-})=1.29\pm 0.30\pm 0.15$, and $\mathcal{B}({\Xi }_c(3080{)}^{+}\to {\Sigma }_c^{\ast ++}{K}^{-})/\mathcal{B}({\Xi }_c(3080{)}^{+}\to {\Sigma }_c^{++}{K}^{-})=1.07\pm 0.27\pm 0.01$, where the uncertainties are statistical and systematic. The analysis is performed using a 980 fb${}^{-1}$ data sample collected with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider.

Submitted to PRD

References in corpus (3)

• Big-Bang Nucleosynthesis
• Strong Decays of Charmed Baryons in Heavy Hadron Chiral Perturbation Theory
• Measurement of masses of the ${\Xi }_c(2645)$ and ${\Xi }_c(2815)$ baryons and observation of ${\Xi }_c(2980)\to {\Xi }_c(2645)\pi$ %and observation of the ${\Xi }_c(2980)$ and observation of ${\Xi }_c(2980)\to {\Xi }_c(2645)\pi$

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