Computing the R^4 term at two Superstring Loops

Details Computing the R^4 term at two Superstring Loops Computing the R^4 term at two Superstring Loops

2002-02-09

arxiv.org/abs/hep-th/0202058v1

JHEP 0202 (2002) 035

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, Latex

Scientific paper

10.1088/1126-6708/2002/02/035

We use a previously derived integral representation for the four graviton amplitude at two loops in Superstring theory, whose leading term for vanishing momenta gives the two-loop contribution to the R^4 term in the Effective Action. We find by an explicit computation that this contribution is zero, in agreement with a general argument implying the vanishing of the R^4 term beyond one loop.

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