Observation of X(3872) in B→X(3872)Kπ decays
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?(772×106BBˉ?pairs) collected at the?Υ(4S)resonance with the Belle detector at the KEKB collider.
We report the first observation ofB0X(3872)(K+)and evidence forB+X(3872)(K0+). We measure the product of branching fractions for the former to beB(B0X(3872)(K+))B(X(3872)J/+)=(7.91.3(stat.)0.4(syst.))106and find thatB0X(3872)K(892)0does not dominate theB0X(3872)K+decay mode. We also measureB(B+X(3872)(K0+))B(X(3872)J/+)=(10.63.0(stat.)0.9(syst.))106. This study is based on the full data sample of 711~fb1(772106BBpairs) collected at the(4S)resonance with the Belle detector at the KEKB collider.
Bala, A. and others
物理学粒子探测技术、辐射探测技术、核仪器仪表
BelleX(3872)
Bala, A. and others.Observation of X(3872) in B→X(3872)Kπ decays[EB/OL].(2016-09-07)[2025-08-05].https://chinaxiv.org/abs/201609.00150.点此复制
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