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

TL;DR

This paper measures the relative branching ratios of various $\Lambda_c^+$ decays involving $\Sigma$ states, providing new experimental data on decay probabilities and limits for suppressed decay modes.

Contribution

It reports the first measurements of several $\Lambda_c^+$ decay branching ratios into $\Sigma$ states, including suppressed modes, with statistical and systematic uncertainties.

Findings

Measured branching ratios for four $\Lambda_c^+$ decay modes.

Established 90% confidence level upper limits for two suppressed decay modes.

Provided systematic and statistical uncertainties for all measurements.

Abstract

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%).