First Observation of the Doubly Cabibbo-Suppressed Decay of a Charmed Baryon: Λc+ →pK+π-

Belle Collaboration

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Abstract

We report the first observation of the decay Λc+→pK+π- using a 980 fb-1 data sample collected by the Belle detector at the KEKB asymmetric-energy e+e- collider. This is the first observation of a doubly Cabibbo-suppressed decay of a charmed baryon. We measure the branching ratio of this decay with respect to its Cabibbo-favored counterpart to be B(Λc+→pK+π-)/B(Λc+→pK-π+)=(2.35±0.27±0.21)×10-3, where the uncertainties are statistical and systematic, respectively.

Original languageEnglish
Article number011801
JournalPhysical Review Letters
Volume117
Issue number1
DOIs
Publication statusPublished - 2016 Jun 27

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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