Two-loop scalar diagrams from string theory

Paolo Di Vecchia; Lorenzo Magnea; Alberto Lerda; Raffaele Marotta; Rodolfo Russo

doi:10.1016/0370-2693(96)01137-9

Two-loop scalar diagrams from string theory

Paolo Di Vecchia
, Lorenzo Magnea
, Alberto Lerda
, Raffaele Marotta
, Rodolfo Russo

Research output: Contribution to journal › Article › peer-review

Abstract

We show how to obtain correctly normalized expressions for the Feynman diagrams of Φ³ theory with an internal U (N) symmetry group, starting from tachyon amplitudes of the open bosonic string, and suitably performing the zero-slope limit by giving an arbitrary mass m to the tachyon. In particular we present explicit results for the two-loop amplitudes of Φ³ theory, in preparation for the more interesting case of multiloop amplitudes of non-abelian gauge theories.

Original language	English
Pages (from-to)	65-76
Number of pages	12
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	388
Issue number	1
DOIs	https://doi.org/10.1016/0370-2693(96)01137-9
Publication status	Published - 7 Nov 1996
Externally published	Yes

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10.1016/0370-2693(96)01137-9

Cite this

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abstract = "We show how to obtain correctly normalized expressions for the Feynman diagrams of Φ3 theory with an internal U (N) symmetry group, starting from tachyon amplitudes of the open bosonic string, and suitably performing the zero-slope limit by giving an arbitrary mass m to the tachyon. In particular we present explicit results for the two-loop amplitudes of Φ3 theory, in preparation for the more interesting case of multiloop amplitudes of non-abelian gauge theories.",

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AU - Di Vecchia, Paolo

AU - Magnea, Lorenzo

AU - Lerda, Alberto

AU - Marotta, Raffaele

AU - Russo, Rodolfo

PY - 1996/11/7

Y1 - 1996/11/7

N2 - We show how to obtain correctly normalized expressions for the Feynman diagrams of Φ3 theory with an internal U (N) symmetry group, starting from tachyon amplitudes of the open bosonic string, and suitably performing the zero-slope limit by giving an arbitrary mass m to the tachyon. In particular we present explicit results for the two-loop amplitudes of Φ3 theory, in preparation for the more interesting case of multiloop amplitudes of non-abelian gauge theories.

AB - We show how to obtain correctly normalized expressions for the Feynman diagrams of Φ3 theory with an internal U (N) symmetry group, starting from tachyon amplitudes of the open bosonic string, and suitably performing the zero-slope limit by giving an arbitrary mass m to the tachyon. In particular we present explicit results for the two-loop amplitudes of Φ3 theory, in preparation for the more interesting case of multiloop amplitudes of non-abelian gauge theories.

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U2 - 10.1016/0370-2693(96)01137-9

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SN - 0370-2693

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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Two-loop scalar diagrams from string theory

Abstract

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