Two-Loop ${\varphi }^4$-Diagrams from String Theory

Abstract

Using the {\em cutting and sewing} procedure we show how to get Feynman diagrams, up to two-loop order, of ${\Phi }^4$-theory with an internal SU(N) symmetry group, starting from tachyon amplitudes of the open bosonic string theory. In a properly defined field theory limit, we easily identify the corners of the string moduli space reproducing the correctly normalized field theory amplitudes expressed in the Schwinger parametrization.

28 pages, 12 figures

References in corpus (2)

• String Theory and Noncommutative Geometry
• Consistent Off-Shell Tree String Amplitudes

Cited by in corpus (8)

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• Systematics of one-loop Yang-Mills diagrams from bosonic string amplitudes
• Non-Commutative Gauge Theories and the Cosmological Constant
• On the gauge chosen by the bosonic open string
• Two-loop Yang-Mills diagrams from superstring amplitudes