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

Journal Article · · Physical Review Letters
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We report the first observation of the decay Λ+c→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(Λ+c→pK+π-)/B(Λ+c→pK-π+)=(2.35±0.27±0.21)×10-3, where the uncertainties are statistical and systematic, respectively.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Organization:
Belle Collaboration
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1298392
Report Number(s):
PNNL-SA--120175; 45392; KA2201020
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 117; ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

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Cited By (7)

Three-body charmed baryon decays with SU(3) flavor symmetry journal April 2019
Production cross sections of hyperons and charmed baryons from e + e − annihilation near s = 10.52     GeV journal April 2018
Observation of the doubly Cabibbo-suppressed decay Ξ c +  → pϕ text January 2019
Visible narrow cusp structure in Λ c + → p K − π + enhanced by triangle singularity journal September 2019
Dalitz-plot decomposition for three-body decays journal February 2020
Observation of the doubly Cabibbo-suppressed decay Ξ c +  → pϕ journal April 2019
Hyperon production in Λ c + → K − p π + and Λ c + → K S 0 p π 0 journal August 2019

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