B. Barish et al., FIRST OBSERVATION OF INCLUSIVE B-DECAY TO THE CHARMED STRANGE BARYONSXI(0)(C) AND XI(+)(C), Physical review letters, 79(19), 1997, pp. 3599-3603
Using data collected in the region of the Upsilon(4S) resonance with t
he CLEO II detector operating at the Cornell Electron Storage Ring (CE
SR), we present the first observation of B mesons decaying into the ch
armed strange baryons Xi(c)(0) and Xi(c)(+). We find 79 +/- 27 Xi(c)(0
) and 125 +/- 28 Xi(c)(+) candidates from B decays, leading to product
branching fractions of B((B) over bar --> Xi(c)(0)X)B(Xi(c)(0) --> Xi
(-)pi(+)) = (0.144 +/- 0.048 +/- 0.021) X 10(-3) and B((B) over bar --
> Xi(c)(+)X)B(Xi(C)(+) --> Xi(-)pi(+)pi(+)) = (0.453 +/- 0.096(+0.085)
(-0.065)) X 10(-3). [S0031-9007(97)04481-5].