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arxiv: 1101.5981 · v8 · pith:2T5OZUOInew · submitted 2011-01-31 · ✦ hep-ph

Chinese Magic in Loop Integrals

classification ✦ hep-ph
keywords pointintegralsloopchinesefunctionmagicapproachargue
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We present an approach to higher point loop integrals using Chinese magic in the virtual loop integration variable. We show, using the five point function in the important e^+e^-\to f\bar{f}+\gamma process for ISR as a pedagogical vehicle, that we get an expression for it directly reduced to one scalar 5-point function and 4-, 3-, and 2- point integrals, thereby avoiding the computation of the usual three tensor 5-pt Passarino-Veltman reduction. We argue that this offers potential for greater numerical stability.

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