Charmed-Baryon Production in High-Energy Neutrino-Deuterium Interactions

Abstract

In a sample of ∼15000 charged current $\nu +d$ interactions from an exposure of the Fermilab 15-ft bubble chamber to a high-energy, wide-band neutrino beam, the production of the ${{\Lambda }_c}^{+}$ charmed baryon decaying into $\Lambda {\pi }^{+}$ and $K^{0}p$ is observed. The measured mass value is 2.275±0.010 GeV. The products of the production rate and the branching ratio for these channels are (1.8±0.9)×${10}^{-3\mathrm{}}$ and (3.5±2.0)×${10}^{-3\mathrm{}}$, respectively.