论文标题
lattice QCD的包含半leptonic衰减
Inclusive semi-leptonic decays from lattice QCD
论文作者
论文摘要
我们开发了一种使用晶状体QCD模拟完全非扰动的黑龙的包含半静态衰减率的方法。所有可能的最终状态的总和是通过计算晶格上的前散射矩阵元素来实现的，并且使用它们对两个插入电流之间的时间分离的依赖性来评估相位空间积分。我们对b_s-> x_c l nu衰减执行了一个试验晶格计算，并具有非物理底部夸克质量，并将结果与相应的OPE计算进行比较。治疗晶格上包含过程的方法可以应用于其他过程，例如Lepton-Nucleon非弹性散射。
We develop a method to compute inclusive semi-leptonic decay rate of hadrons fully non-perturbatively using lattice QCD simulations. The sum over all possible final states is achieved by a calculation of the forward-scattering matrix elements on the lattice, and the phase-space integral is evaluated using their dependence on the time separation between two inserted currents. We perform a pilot lattice computation for the B_s -> X_c l nu decay with an unphysical bottom quark mass and compare the results with the corresponding OPE calculation. The method to treat the inclusive processes on the lattice can be applied to other processes, such as the lepton-nucleon inelastic scattering.
