Measurements of Xi(c)+ branching ratios

Journal Article · Thu May 01 04:00:00 EDT 2003 · Phys.Lett.B

DOI:https://doi.org/10.1016/S0370-2693(03)00809-8· OSTI ID:1893386

Link, J. M.

Using data collected by the fixed target Fermilab experiment FOCUS, we measure the branching ratios of the Cabibbo favored decays $$\Xi_c^+ \to \Sigma^+K^-\pi^+$$, $$\Xi_c^+ \to \Sigma^+ \bar{K}^{*}(892)^0$$, and $$\Xi_c^+ \to \Lambda^0K^-\pi^+\pi^+$$ relative to $$\Xi_c^+ \to \Xi^-\pi^+\pi^+$$ to be $$0.91\pm0.11\pm0.04$$, $$0.78\pm0.16\pm0.06$$, and $$0.28\pm0.06\pm0.06$$, respectively. We report the first observation of the Cabibbo suppressed decay $$\Xi_c^+ \to \Sigma^+K^+K^-$$ and we measure the branching ratio relative to $$\Xi_c^+ \to \Sigma^+K^-\pi^+$$ to be $$0.16\pm0.06\pm0.01$$. We also set 90% confidence level upper limits for $$\Xi_c^+ \to \Sigma^+ \phi$$ and $$\Xi_c^+ \to \Xi^*(1690)^0(\Sigma^+ K^-) K^+$$ relative to $$\Xi_c^+ \to \Sigma^+K^-\pi^+$$ to be 0.12 and 0.05, respectively. We find an indication of the decays $$\Xi_c^+ \to \Omega^-K^{+}\pi^+$$ and $$\Xi_c^+ \to \Sigma^{*}(1385)^+ \bar{K}^0$$ and set 90% confidence level upper limits for the branching ratios with respect to $$\Xi_c^+ \to \Xi^-\pi^+\pi^+$$ to be 0.12 and 1.72, respectively. Finally, we determine the 90% C.L. upper limit for the resonant contribution $$\Xi_c^+ \to \Xi^{*}(1530)^0 \pi^+$$ relative to $$\Xi_c^+ \to \Xi^-\pi^+\pi^+$$ to be 0.10.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Contributing Organization: FOCUS
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1893386
• Report Number(s): FERMILAB-PUB-03-134-E; arXiv:hep-ex/0305038; oai:inspirehep.net:618864
• Journal Information: Phys.Lett.B, Journal Name: Phys.Lett.B Vol. 571
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS