Observation of Λ + c → Λ 0 K + , Λ + c → Σ 0 K + and Λ + c → Σ + K + π − decays
نویسندگان
چکیده
We present measurements of the Cabibbo-suppressed decays Λc → Λ 0K+ and Λc → Σ 0K+ (both first observations), Λc → Σ +K+π− (seen with large statistics for the first time), Λc → pK +K− and Λc → pφ (measured with improved accuracy). Improved branching ratio measurements for the decays Λc → Σ +K+K− and Λc → Σ +φ, which are attributed to W-exchange diagrams, are shown. We also present the first evidence for Λc → Ξ(1690)K + and set an upper limit on non-resonant Λc → Σ +K+K− decay. This analysis was performed using 23.6 fb−1 of data collected by the Belle detector at the e+e− asymmetric collider KEKB. Typeset using REVTEX
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