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Phys. Rev. D 62, 092007 (2000) [12 pages]

Measurement of the product branching fraction B(cΘcXB(ΘcΛX)

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R. Ammar et al. (CLEO Collaboration)
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Received 28 April 2000; published 12 October 2000

Based on a high statistics e+e-cc̅ data sample, we report on the inclusive rate for charmed baryons to decay into Λ particles using charm-event tagging. We select e+e-cc̅ events which have a clear anti-charm tag and measure the Λ content in the hemisphere opposite the tag (charge conjugate modes are implicit). This allows us to determine the product branching fraction BΛ=B(cΘcXB(ΘcΛX), where Θc represents a sum over all charmed baryons produced in e+e- fragmentation at s=10.5 GeV, given our specific tags. We obtain BΛ=(1.87±0.03±0.33)%.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.62.092007
DOI:
10.1103/PhysRevD.62.092007
PACS:
13.30.-a, 13.60.Rj, 13.65.+i, 14.20.Lq