Scalar field theory limits of bosonic string amplitudes

Details Scalar field theory limits of bosonic string amplitudes Scalar field theory limits of bosonic string amplitudes

1999-12-20

arxiv.org/abs/hep-th/9912183v2

Nucl.Phys. B579 (2000) 379-410

Physics

High Energy Physics

High Energy Physics - Theory

35 pages, LaTeX with epsf, 11 figures. Misprints corrected, version to be published on Nucl. Phys. B

Scientific paper

10.1016/S0550-3213(00)00200-5

We describe in detail the techniques needed to compute scattering amplitudes for colored scalars from the infinite tension limit of bosonic string theory, up to two loops. These techniques apply both to cubic and quartic interactions, and to planar as well as non-planar diagrams. The resulting field theories are naturally defined in the space-time dimension in which they are renormalizable. With a careful analysis of string moduli space in the Schottky representation we determine the region of integration for the moduli, which plays a crucial role in the derivation of the correct combinatorial and color factors for all diagrams.

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