| Abstract |
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Using 232 fb-1 of data collected by the BABAR detector, the Xic'+ and
Xic'0 baryons are reconstructed through the decays: Xic'+ -> Xic+ gamma
and Xic'0 -> Xic0 gamma, where Xic+ -> Xi- pi+ pi+ and Xic0 -> Xi- pi+.
By measuring the efficiency-corrected yields in different intervals of the
center-of-mass momentum, the production rates from B decays and from the
continuum are extracted. For production from B decays, the branching
fractions are found to be
B(B -> Xic'+ X) x B(Xic+ -> Xi- pi+ pi+) = [ 1.69 +- 0.17 (exp.) +- 0.10 (model) ] x 10^-4
and B(B -> Xic'0 X) x B(Xic0 -> Xi- pi+) = [ 0.67 +- 0.07 (exp.) +- 0.03 (model) ] x 10^-4.
For production from the continuum the cross-sections are found to be
sigma(e+ e- -> Xic'+ X) x B(Xic+ -> Xi- pi+ pi+) = 141 +- 24 (exp.) +- 19 (model) fb
and sigma(e+ e- -> Xic'0 X) x B(Xic0 -> Xi- pi+) = 70 +- 11 (exp.) +- 6 (model) fb.
The helicity angle distributions of Xic' decays are studied
and found to be consistent with J = 1/2.
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