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Observation of Cabibbo-suppressed and W-exchange Lambda_c^+ baryon decays
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Observation of Cabibbo-suppressed and W-exchange Lambda_c^+ baryon decays
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We present measurements of the Cabibbo-suppressed decays Lambda_c^+ --> Lambda0 K+ and Lambda_c^+ --> Sigma0 K+ (both first observations), Lambda_c^+ --> Sigma+ K+ pi- (seen with large statistics for the first time), Lambda_c^+ --> p K+ K- and Lambda_c^+ --> p phi (measured with improved accuracy). Improved branching ratio measurements for the decays Lambda_c^+ --> Sigma+ K+ K- and Lambda_c^+ --> Sigma+ phi, which are attributed to W-exchange diagrams, are shown. We also present the first evidence for Lambda_c^+ --> Xi(1690)^0 K+ and set an upper limit on the non-resonant decay Lambda_c^+ --> Sigma+ K+ K-. This analysis was performed using 32.6 fb^{-1} of data collected by the Belle detector at the asymmetric e+ e- collider KEKB.
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Cited by 1 Pith paper
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Hadron Spectroscopy: Experimental Overview
Hadron spectroscopy's experimental status is reviewed from PDG listings: the conventional and exotic meson and baryon spectrum through 2025-2026, with no new results reported.
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