Artículos de revistas
Multiloop superstring amplitudes from non-minimal pure spinor formalism
Fecha
2006-12-01Registro en:
Journal of High Energy Physics. Trieste: Int School Advanced Studies, n. 12, 22 p., 2006.
1126-6708
1029-8479
WOS:000244081100030
2-s2.0-33846158840
Autor
Universidade Estadual Paulista (Unesp)
Inst Hautes Etud Sci
Institución
Resumen
Using the non-minimal version of the pure spinor formalism, manifestly super-Poincare covariant superstring scattering amplitudes can be computed as in topological string theory without the need of picture-changing operators. The only subtlety comes from regularizing the functional integral over the pure spinor ghosts. In this paper, it is shown how to regularize this functional integral in a BRST-invariant manner, allowing the computation of arbitrary multiloop amplitudes. The regularization method simplifies for scattering amplitudes which contribute to ten-dimensional F-terms, i.e. terms in the ten-dimensional superspace action which do not involve integration over the maximum number of theta's.