玻色子和费米子散射振幅的张量分解
Tensor decomposition for bosonic and fermionic scattering amplitudes
摘要：
在本文中，我们详细说明了一种方法来分解成洛伦兹不变的形状因子，它利用了考虑四维外部状态所产生的简化多回路多腿散射振幅。我们提出了一个简单和通用的方法，适用于费米和玻色子振幅，并允许我们确定一个最小数量的物理相关的形状因子，这可以是相关的一对一的独立螺旋振幅。我们明确讨论其适用性的各种四点和五点散射振幅相关的大型强子对撞机物理。
英文摘要：
In this paper, we elaborate on a method to decompose multiloop multileg scattering amplitudes into Lorentz-invariant form factors, which exploits the simplifications that arise from considering four-dimensional external states. We propose a simple and general approach that applies to both fermionic and bosonic amplitudes and allows us to identify a minimal number of physically relevant form factors, which can be related one-to-one to the independent helicity amplitudes. We discuss explicitly its applicability to various four- and five-point scattering amplitudes relevant for LHC physics.
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