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Production of $\Lambda(c$) With Large X(f) at the {ISR}

The R608 collaboration Chauvat, P. ; Cousins, R. ; Hayes, K. ; et al.
Phys.Lett.B 199 (1987) 304, 1987.
Inspire Record 250761 DOI 10.17182/hepdata.30058

We report results of an inclusive measurement of the charmed baryon, Λ c , in the forward direction of proton-proton interactions with s =63 GeV . The signal, seen in the final state Λ s π + π + π − , has 6.0 σ significance with about 620 events on a large background and corresponds to a cross section times branching ratio of 2.84±0.50±0.72 μ b for Feynman- x F > 0.5 in both hemispheres. Asymmetries are observed in the decay angular distributions which are characteristic of weak decays and have a combined 3.0 σ significance.

1 data table
Table 1

BR. RATIO WAS TAKEN TO BE 0.028+-0.007+-0.011.