What is a parton shower?
What is a parton shower?
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什么是帕顿淋浴？
作者：
Z. Nagy;D. Soper
我们考虑理想的部分阵雨事件生成器，它精确地处理部分自旋和颜色，而不考虑自旋和颜色的实际近似选择。我们研究了这种部分子阵雨发生器的结构与QCD结构的关系。我们认为具有与αs成比例的分裂函数的部分子阵雨不仅可以被视为一个模型，而且可以被视为在任何微扰阶上定义的阵雨的最低阶近似。为了支持这一论点，我们提出了一个对于任意k的αsk阶部子阵雨的公式。由于所需的一些输入函数是由它们的性质指定的，但没有计算，因此该公式不能为αsk阶部子阵雨算法提供有用的配方。然而，在这个公式中，我们看到产生阵雨的算子与指定QCD的红外奇点的算子是如何相关的。
We consider idealized parton shower event generators that treat parton spin and color exactly, leaving aside the choice of practical approximations for spin and color. We investigate how the structure of such a parton shower generator is related to the structure of QCD. We argue that a parton shower with splitting functions proportional to αs can be viewed not just as a model, but as the lowest order approximation to a shower that is defined at any perturbative order. To support this argument, we present a formulation for a parton shower at order αsk for any k. Since some of the input functions needed are specified by their properties but not calculated, this formulation does not provide a useful recipe for an order αsk parton shower algorithm. However, in this formulation we see how the operators that generate the shower are related to operators that specify the infrared singularities of QCD.
影响因子：
5.4
作者：
R. Frederix;K. Hamilton
通讯作者：
R. Frederix;K. Hamilton