Observation of X(3872) in B→X(3872)Kπ decays

Subjects: Physics >> Nuclear Physics submitted time 2016-09-07

Bala, A. and others

Abstract： We report the first observation of B0→X(3872)(K+π−) and evidence for B+→X(3872)(K0π+). We measure the product of branching fractions for the former to be B(B0→X(3872)(K+π−))×B(X(3872)→J/ψπ+π−)=(7.9±1.3(stat.)±0.4(syst.))×10−6and find that B0→X(3872)K∗(892)0 does not dominate the B0→X(3872)K+π− decay mode. We also measure B(B+→X(3872)(K0π+))×B(X(3872)→J/ψπ+π−)=(10.6±3.0(stat.)±0.9(syst.))×10−6. This study is based on the full data sample of 711~fb−1 (772×106BB¯ pairs) collected at the Υ(4S)resonance with the Belle detector at the KEKB collider.

Peer Review Status:Awaiting Review

 Hits 635  Downloads 362  Comment