Light-by-light scattering in SANC
D. Bardin, L. Kalinovskaya, V. Kolesnikov, E. Uglov
Abstract
In this paper we describe the implementation of the QED process γγγγ through a fermion loop into the framework of SANC system. The computations of this process takes into account non-zero mass of loop-fermion. We briefly describe additional precomputation modules used for calculation of massive fermion-box diagrams. We present the covariant and helicity amplitudes for this process and also some particular cases of D0 and C0 Passarino-Veltman functions. Whenever possible, we compare the results with those existing in the literature.
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