Measurement of the Decay Rate of Xi_c^0 --> pK^-K^-pi^+ Relative to Xi_c^0 --> Xi^-pi^+

TL;DR

This paper reports a measurement of the decay rate of Xi_c^0 to pK^-K^-pi^+ relative to Xi_c^0 to Xi^-pi^+ using the CLEOIII detector, including resonant substructure analysis and branching ratios.

Contribution

The study provides the first measurement of the branching ratio for Xi_c^0 decays to pK^-K^-pi^+ relative to Xi^-pi^+, and investigates its resonant substructure.

Findings

Branching ratio B(Xi_c^0 to pK^-K^-pi^+)/B(Xi_c^0 to Xi^-pi^+) = 0.35 ± 0.08 (stat) ± 0.05 (syst).

Evidence for Xi_c^0 decays to p K*(890) K^- with a measured ratio of 0.14 ± 0.04 (stat) ± 0.02 (syst).

Non-resonant decay ratio B(Xi_c^0 to pK^-K^-pi^+)/B(Xi_c^0 to Xi^-pi^+) = 0.21 ± 0.05 (stat) ± 0.03 (syst).

Abstract

Using the CLEOIII detector at CESR, we have measured the branching ratio of the decay Xic0 to pK-K-pi+ relative to Xic0 to Xi- pi+. We find B(Xic0 to pK-K-pi+)/B(Xic0 to Xi-pi+)= 0.35+/-$0.08(stat)+/-0.05(syst). In the resonant substructure of this mode, we find evidence for Xi_c0 decays to p K*(890)K-, and measure B(Xic0 to p K*(890) K^-).B(K*(890) to K-pi+) /B(Xic0 to Xi-pi+)=0.14+/-0.04(stat)+/-0.02(syst) and B(Xic0 to pK-K-pi+)/B(Xic0 to Xi-pi+)=0.21+/-0.05(stat)+/-0.03(syst) for the non-resonant Xic0 decays pK-K-pi+ decays.