We have studied the Cabibbo suppressed decay (\Lambda_{ c}^{ +}\to \Sigma ^{ +}K^{ *0}(892)) and the Cabibbo favored decays (\Lambda_{ c}^{ +}\to \Sigma ^{ +}K^{ +}K^{ -}), (\Lambda_{ c}^{ +}\to \Sigma ^{ +}\phi) and (\Lambda_{ c}^{ +}\to \Xi ^{ *0}(\Sigma^{ +}K^{ -})K^{ +}) and measured their branching ratios relative to (\Lambda_{ c}^{ +}\to \Sigma ^{ +}\pi ^{ +}\pi ^{ -}) to be ((7.8\pm 1.8\pm 1.3)%), ((7.1\pm 1.1\pm 1.1)%), ((8.7\pm 1.6\pm 0.6)%) and ((2.2\pm 0.6\pm 0.6)%), respectively. The first error is statistical and the second is systematic. We also report two 90% confidence level limits (\Gamma (\Lambda_{ c}^{ +}\to \Sigma ^{ -}K^{ +}\pi ^{ +})/\Gamma (\Lambda_{ c}^{ +}\to \Sigma^{ +}K^{ *0}(892))<35%) and (\Gamma (\Lambda_{ c}^{ +}\to \Sigma ^{ +}K^{ +}K^{ -})_{ NR}/\Gamma(\Lambda_{ c}^{ +}\to \Sigma ^{ +}\pi ^{ +}\pi ^{ -})<2.8%).

Categories: hep-ex

Measurements of Relative Branching Ratios of $\Lambda_{c}^{+}$ Decays into States Containing $\Sigma$