Work

Covariant multiloop superstring amplitudes⁎⁎A more detailed version of these proceedings has been published in Journal for High Energy Physics 0409 (2004) 047.

Year: 2005

Type: article

Abstract: In this article, the multiloop amplitude prescription using the super-Poincaré 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. Also, R 4 terms receive no multiloop contributions in agreement with the Type IIB S -duality conjecture of Green and Gutperle.

Source: Comptes Rendus Physique

DOI: 10.1016/j.crhy.2004.12.009

Author: Nathan Berkovits

Institution: Universidade Estadual Paulista (Unesp)

Language: English

Topic: Black Holes and Theoretical Physics

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: Fundação de Amparo à Pesquisa do Estado de São Paulo, Conselho Nacional de Desenvolvimento Científico e Tecnológico

Award: Research and Instruction in String Theory