Covariant Multiloop Superstring Amplitudes

Details Covariant Multiloop Superstring Amplitudes Covariant Multiloop Superstring Amplitudes

2004-10-07

arxiv.org/abs/hep-th/0410079v1

Comptes Rendus Physique 6 (2005) 185-197

Physics

High Energy Physics

High Energy Physics - Theory

Strings 2004 talk

Scientific paper

10.1016/j.crhy.2004.12.009

In these proceedings, the multiloop amplitude prescription using the super-Poincare invariant pure spinor formalism for the superstring is reviewed. Unlike the RNS prescription, there is no sum over spin structures and surface terms coming from the boundary of moduli space can be ignored. Massless N-point multiloop amplitudes vanish for N<4, which implies (with two mild assumptions) the perturbative finiteness of superstring theory. And R^4 terms receive no multiloop corrections in agreement with the Type IIB S-duality conjecture of Green and Gutperle.

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