We report evidence for the Cabibbo-suppressed decay of the charm baryon Λc+ into the final state pK-K+. The analysis is performed on data collected by high energy photoproduction experiment E687 during the 1990-1991 Fermilab fixed target run. The branching ratio of the decay Λc+ → pK-K+ relative to the non-suppressed Λc+ → pK-π+ is measured to be BR(pK-K+/pK-π+) = 0.096 ± 0.029 ± 0.010. The upper limit of the decay into pø relative to the inclusive pK-K+ decay is measured to be BR(pø/pK-K+ < 58% at the 90% confidence level.
ASJC Scopus subject areas
- Nuclear and High Energy Physics