First Observation of Inclusive $B$ Decays to the Charmed Strange Baryons $\Xi_{c}^{0}$ and $\Xi_{c}^{+}$

TL;DR

This paper reports the first observation of B mesons decaying into the charmed strange baryons Xi_c0 and Xi_c+ using data from the CLEO II detector, measuring their branching fractions.

Contribution

It provides the first experimental evidence of B decays to Xi_c0 and Xi_c+ baryons and measures their product branching fractions.

Findings

First observation of B decays to Xi_c0 and Xi_c+

Measured product branching fractions for these decays

Quantified the number of candidate events for each decay

Abstract

Using data collected in the region of the Upsilon(4S) resonance with the CLEO II detector operating at the Cornell Electron Storage Ring CESR, we present the first observation of B mesons decaying into the charmed strange baryons Xi_c0 and Xi_c+. We find 79 +/- 27 Xi_c0 and 125 +/- 28 Xi_c+ candidates from B decays, leading to product branching fractions of BR(Bbar -> Xi_c0 X)BR(Xi_c0 -> Xi- pi+) = (0.144 +/- 0.048 +/- 0.021) x 10^-3 and BR(Bbar -> Xi_c+ X)BR(Xi_c+ -> Xi- pi+ pi+) = (0.453 +/- 0.096 +0.085-0.065) x 10^-3.