Gomez, Humberto [UNESP]2013-09-302014-05-202013-09-302014-05-202012-09-01Fortschritte Der Physik-progress of Physics. Weinheim: Wiley-v C H Verlag Gmbh, v. 60, n. 9-10, p. 1030-1037, 2012.0015-8208http://hdl.handle.net/11449/24166Using the results recently obtained for computing integrals over (non-minimal) pure spinor superspace, we compute the coefficient of the massless two-loop four-point amplitude from first principles. This proceeding is a very short summary on the paper [arXiv:1003.0678 [hep-th]], which was done with the collaboration of Carlos R. Mafra.1030-1037engScattering amplitudespure spinor formalismtopological stringArtigo10.1002/prop.201200031WOS:000308301500013Acesso restrito