An exact formula for the radiation of a moving quark in $\mathcal{N} = 4$ super Yang Mills
An exact formula for the radiation of a moving quark in $\mathcal{N} = 4$ super Yang Mills
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DOI：
10.1007/jhep06(2012)048
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发表时间：
2012-02
影响因子：
5.4
通讯作者：
D. Correa;J. Henn;J. Maldacena;A. Sever
中科院分区：
文献类型：
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作者：
D. Correa;J. Henn;J. Maldacena;A. Sever
导出了小角度尖点反常维数的精确公式。这是通过将后者与通过超对称定位执行的某些1/8 BPS Wilson循环的计算相关联来完成的。这个耦合函数还决定了超杨米尔斯中运动夸克的辐射功率以及Wilson环上位移算符两点函数的系数。用类似的方法计算了广义尖点反常维数的近BPS展开。
We derive an exact formula for the cusp anomalous dimension at small angles. This is done by relating the latter to the computation of certain 1/8 BPS Wilson loops which was performed by supersymmetric localization. This function of the coupling also determines the power emitted by a moving quark insuper Yang Mills, as well as the coefficient of the two point function of the displacement operator on the Wilson loop. By a similar method we compute the near BPS expansion of the generalized cusp anomalous dimension.