Measurement of the branching fraction of Ξ0c → Λ+ c π− at Belle

Abstrakt

Based on a data sample of 983 fb-1 collected with the Belle detector at theKEKBasymmetric-energy eþe- collider,we present the study of the heavy-flavor-conserving decay Ξ0c

RIGHTWARDS ARROW Λþcπ- withΛþc reconstructed via its pK-πþ decay mode. The branching fraction ratio BðΞ0c

RIGHTWARDS ARROW Λþc

π-Þ=BðΞ0c

RIGHTWARDS ARROW Ξ-πþÞ is measured to be 0.38 0.04 0.04. Combining with the world average value of BðΞ0c

RIGHTWARDS ARROW Ξ-πþÞ, the branching fraction

BðΞ0c

RIGHTWARDS ARROW Λþc

π-Þ is deduced to be ð0.54 0.05 0.05 0.12Þ%. Here, the uncertainties above are statistical, systematic, and from BðΞ0c

RIGHTWARDS ARROW Ξ-πþÞ, respectively

Klíčová slova

• Measurement
• branching
• fraction
• Ξ0c →
• Λ+ c
• Belle