论文标题
$ W^\pmγ+J $生产的两环领导色螺旋振幅
Two-loop leading colour helicity amplitudes for $W^\pmγ+j$ production at the LHC
论文作者
论文摘要
我们介绍了该过程$ pp \ to w（\ tolν）γ+j $的两循环领先QCD螺旋振幅。我们使用有限的字段算术进行了完全减少振幅的幅度，包括$ w $ -boson的松性衰变，并使用最近确定的特殊功能的基础提取分析有限的剩余。在考虑有理学运动学参数化和多元部分分数的排列后，获得了简化的分析表达式。我们证明了对两循环的颜色和螺旋性的有效数值评估，总结了物理运动学的有限剩余，因此对现象学应用的适用性。
We present the two-loop leading colour QCD helicity amplitudes for the process $pp\to W(\to lν)γ+j$. We implement a complete reduction of the amplitudes, including the leptonic decay of the $W$-boson, using finite field arithmetic, and extract the analytic finite remainders using a recently identified basis of special functions. Simplified analytic expressions are obtained after considering permutations of a rational kinematic parametrisation and multivariate partial fractioning. We demonstrate efficient numerical evaluation of the two-loop colour and helicity summed finite remainders for physical kinematics, and hence the suitability for phenomenological applications.
