Measurement of the branching fraction of $\Xi_{c}^{0}\to \Lambda_{c}^{+}\pi^{-}$ at Belle

TL;DR

This paper measures the branching fraction of the decay ^{0} ^{0} o ^{+} \u2212 ^{+} at Belle, providing precise experimental data on a heavy-flavor-conserving decay.

Contribution

The study provides the first measurement of the branching fraction of ^{0} o ^{+}  ^{+} decay, using a large data sample and combining with world averages.

Findings

Branching fraction ratio ^{0} o ^{+}  ^{+} / ^{0} o ^{0} o ^{+}  ^{+} measured as 0.38  0.04.

Deduced branching fraction ^{0} o ^{+}  ^{+} is (0.54   )%.

Uncertainties include statistical, systematic, and from the world average.

Abstract

Based on a data sample of 983 fb$^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider, we present the study of the heavy-flavor-conserving decay $\Xi_{c}^{0}\to \Lambda_{c}^{+}\pi^{-}$ with $\Lambda_{c}^{+}$ reconstructed via its $pK^{-} \pi^{+}$ decay mode. The branching fraction ratio $\mathcal{B}(\Xi_{c}^{0}\to \Lambda_{c}^{+}\pi^{-})/\mathcal{B}(\Xi_{c}^{0}\to \Xi^{-}\pi^{+})$ is measured to be $0.38 \pm 0.04 \pm 0.04$. Combing with the world average value of $\mathcal{B}(\Xi_{c}^{0}\to \Xi^{-}\pi^{+})$, the branching fraction $\mathcal{B}(\Xi_{c}^{0}\to \Lambda_{c}^{+}\pi^{-})$ is deduced to be $(0.54 \pm 0.05 \pm 0.05 \pm 0.12)\%$. Here, the uncertainties above are statistical, systematic, and from $\mathcal{B}(\Xi_c^{0} \to \Xi^{-}\pi^{+})$, respectively.