On the Evaluation of Compton Scattering Amplitudes in String Theory

Details On the Evaluation of Compton Scattering Amplitudes in String Theory On the Evaluation of Compton Scattering Amplitudes in String Theory

1997-10-30

arxiv.org/abs/hep-th/9710237v1

Int.J.Mod.Phys. A13 (1998) 4717-4758

Physics

High Energy Physics

High Energy Physics - Theory

41 pages, Latex

Scientific paper

10.1142/S0217751X98002237

We consider the Compton amplitude for the scattering of a photon and a (massless) ``electron/positron'' at one loop (i.e. genus one) in a four-dimensional fermionic heterotic string model. Starting from the bosonization of the world-sheet fermions needed to explicitly construct the spin-fields representing the space-time fermions, we present all the steps of the computation which leads to the explicit form of the amplitude as an integral of modular forms over the moduli space.

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