Y, Li and Y B, Li and Giri, Anjan Kumar and et al, .
(2019)
Measurements of the branching fractions B (B→ Λ cΞc′0), B (B→ Λ cΞc (2645)0) and B (B→ Λ cΞc (2790)0) MEASUREMENTS of the BRANCHING FRACTIONS.
Physical Review D, 100 (11).
ISSN 24700010
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Abstract
Using the data sample of 711 fb1 of Ï'(4S) onresonance data taken by the Belle detector at the KEKB asymmetricenergy electronpositron collider, we present the first measurements of branching fractions of the decays B→ΛcΞc′0, B→ΛcΞc(2645)0, and B→ΛcΞc(2790)0. The signal yields for these decays are extracted from the recoil mass spectrum of the system recoiling against Λcbaryons in selected Bcandidates. The branching fraction of B→ΛcΞc(2790)0 is measured to be (1.1±0.4±0.2)×103, where the first uncertainty is statistical and the second is systematic. The 90% credibility level upper limits on B(B→ΛcΞc′0) and B(B→ΛcΞc(2645)0) are determined to be 6.5×104 and 7.9×104, respectively.
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