Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-03-06
Physics
High Energy Physics
High Energy Physics - Theory
8 pages, 8 figure.eps, JHEP.cls, talk given by R. Marotta at the TMR Conference "Quantum aspects of gauge theories, supersymme
Scientific paper
The {\em cutting and sewing} procedure is used for getting two-loop order
Feynman diagrams of $\Phi^{4}$-theory with an internal SU(N) symmetry group,
starting from tachyon amplitudes of the open bosonic string theory. In a
suitably defined field theory limit, we reproduce the field theory amplitudes
properly normalized and expressed in the Schwinger parametrization.
Marotta Raffaele
Pezzella Franco
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