标题： 共振三体$B$衰变中的宽度效应 显示英文标题

标题： Width effects in resonant three-body $B$ decays

摘要： 对于通过中间共振介导的三体$B$衰变，我们展示了如何正确提取准二体衰变率，以便与相应的理论估计进行有意义的比较。 我们在QCD因子化方法中计算了有限宽度效应的修正因子，并与使用实验参数化的结果进行了比较，在该参数化中弱动力学中的动量依赖性缺失。 尽管对于张量和矢量共振子来说差异通常小于$10\%$，但对于标量共振子而言，差异可能高达$(25-40)\%$。 显示英文摘要

摘要： For three-body $B$ decays mediated by intermediate resonances, we show how to properly extract the quasi-two-body decay rates for a meaningful comparison with the corresponding theoretical estimates. We compute the correction factor from finite width effects in the QCD factorization approach, and make a comparison with that using the experimental parameterization in which the momentum dependence in the weak dynamics is absent. Although the difference is generally less than $10\%$ for tensor and vector resonances, it can be as large as $(25-40)\%$ for scalar resonances.