B−→K−χc0 decay from charmed meson rescattering
B−→K−χc0 decay from charmed meson rescattering
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DOI：
10.1016/s0370-2693(02)02306-7
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发表时间：
2002-07
影响因子：
4.4
通讯作者：
P. Colangelo;F. Fazio;T. Pham
中科院分区：
文献类型：
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作者：
P. Colangelo;F. Fazio;T. Pham
我们研究了考虑介子再散射效应的B−→K−χ过程。对于这种衰变模式，天真的因式分解ansatz将预测一个消失的振幅。我们估计了D(∗)SD(∗)→K−χC0)散射幅度的贡献，并与最近的实验测量结果进行了比较。我们发现，再散射效应能够产生与Belle合作测量结果一致的大分支率。我们还考虑了B−→K−J/ψ中的再散射效应，认为它们在为这种颜色抑制的衰变模式产生大的分枝比例方面起着类似的作用。
We study the process B−→K−χc0considering intermediate charmed meson rescattering effects. For this decay mode the naive factorization ansatz would predict a vanishing amplitude. We estimate contributions from the D(∗)sD(∗)→K−χc0rescattering amplitudes, and compare the result with recent experimental measurements. We find that rescattering effects are able to produce a large branching ratio consistent with measurements by Belle Collaboration. We also consider rescattering effects in B−→K−J/ψ, arguing that they play a similar role in producing a large branching fraction for this colour-suppressed decay mode.