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arXiv 1003.2824hep-ph
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NNLO胶子散射的天线减法

Antenna subtraction for gluon scattering at NNLO

E. W. N. Glover, Joao Pires

摘要:

我们利用天线减法分离出次-次-领先阶胶子散射振幅中的双实辐射红外奇异性。天线减法框架已成功地应用于计算电子正电子湮没中3-喷注截面和相关事件形状分布的NNLO修正。在这里,我们考虑在初始状态下的两种颜色的粒子的过程,特别是在强子对撞机,如大型强子对撞机(LHC)的双喷流生产。我们构造了一个减法项,描述了单和双未解决的贡献,从六胶子树级过程中使用天线功能与初始状态部分子和数值计算表明,减法项正确近似的矩阵元素在各种单和双未解决的配置。

英文摘要:

We use the antenna subtraction method to isolate the double real radiation infrared singularities present in gluonic scattering amplitudes at next-to-next-to-leading order. The antenna subtraction framework has been successfully applied to the calculation of NNLO corrections to the 3-jet cross section and related event shape distributions in electron-positron annihilation. Here we consider processes with two coloured particles in the initial state, and in particular two-jet production at hadron colliders such as the Large Hadron Collider (LHC). We construct a subtraction term that describes the single and double unresolved contributions from the six-gluon tree-level process using antenna functions with initial state partons and show numerically that the subtraction term correctly approximates the matrix elements in the various single and double unresolved configurations.

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