Measurements of ${\Xi }_c^{+}$ Branching Ratios

Abstract

Using data collected by the fixed target Fermilab experiment FOCUS, we measure the branching ratios of the Cabibbo favored decays ${\Xi }_c^{+}\to {\Sigma }^{+}{K}^{-}{\pi }^{+}$, ${\Xi }_c^{+}\to {\Sigma }^{+}{\bar{K}}^{\ast }(892{)}^0$, and ${\Xi }_c^{+}\to {\Lambda }^0{K}^{-}{\pi }^{+}{\pi }^{+}$ relative to ${\Xi }_c^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+}$ to be $0.91\pm 0.11\pm 0.04$, $0.78\pm 0.16\pm 0.06$, and $0.28\pm 0.06\pm 0.06$, 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 $0.16\pm 0.06\pm 0.01$. We also set 90% confidence level upper limits for ${\Xi }_c^{+}\to {\Sigma }^{+}\varphi$ and ${\Xi }_c^{+}\to {\Xi }^{\ast }(1690{)}^0({\Sigma }^{+}{K}^{-})K^{+}$ 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 ${\Xi }_c^{+}\to {\Sigma }^{\ast }(1385{)}^{+}{\bar{K}}^0$ 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 ${\Xi }_c^{+}\to {\Xi }^{\ast }(1530{)}^0{\pi }^{+}$ relative to ${\Xi }_c^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+}$ to be 0.10.

arXiv comment14 pages, 8 figures

References in corpus (9)

• Cerenkov Particle Identification in FOCUS
• Observation of Cabibbo-suppressed and W-exchange Lambda_c^+ baryon decays
• Study of the Cabibbo-suppressed decay modes D0-->Pi-pi+ and D0-->K-K+
• Reconstruction of Vees, Kinks, ${\Xi }^{-}$'s, and ${\Omega }^{-}$'s in the Focus Spectrometer
• A New Measurement of the Cascade(c)+ Lifetime
• Observation of the Cabibbo-suppressed decay Xi_c+ -> p K- pi+
• Cabibbo suppressed decays and the ${\Xi }_c^{+}$ lifetime
• Measurements of Relative Branching Ratios of ${\Lambda }_c^{+}$ Decays into States Containing $\Sigma$
• Observation of the ${\Xi }_c^{+}$ Charmed Baryon Decays to ${\Sigma }^{+}{K}^{-}{\pi }^{+}$, ${\Sigma }^{+}{\bar{K}}^{\ast 0}$, and $\Lambda K^{-}{\pi }^{+}{\pi }^{+}$

Cited by in corpus (6)

• Charmed Baryon Physics Circa 2021
• Two-body charmed baryon decays involving vector meson with $SU(3)$ flavor symmetry
• Charmed Baryon Weak Decays with Vector Mesons
• Nonleptonic three-body charmed baryon weak decays with H(15)
• Measurement of masses and branching ratios of ${\Xi }_c^{+}$ and ${\Xi }_c^0$ baryons
• First Observation of the Cabibbo-suppressed Decays Xi_c+ -> Sigma+ pi- pi+ and Xi_c+ -> Sigma- pi+ pi+ and Measurement of their Branching Ratios