Chinese Magic in Loop Integrals

Details Chinese Magic in Loop Integrals Chinese Magic in Loop Integrals

2011-01-31

arxiv.org/abs/1101.5981v8

Phys. Rev. D 83 (2011) 113014

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 1 figure; improved figure, improved text and references;added CERN report number;extended text; corrected misprint;

Scientific paper

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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