Lorentz-Covariant Green-Schwarz Superstring Amplitudes

Details Lorentz-Covariant Green-Schwarz Superstring Amplitudes Lorentz-Covariant Green-Schwarz Superstring Amplitudes

1992-11-04

arxiv.org/abs/hep-th/9211025v1

Phys.Lett.B300:53-60,1993

Physics

High Energy Physics

High Energy Physics - Theory

11 pages plain Tex, KCL-TH-92-6

Scientific paper

10.1016/0370-2693(93)90748-7

In a recent paper, the BRST formalism for the gauge-fixed N=2 twistor-string was used to calculate Green-Schwarz supersring scattering amplitudes with an arbitrary number of loops and external massless states. Although the gauge-fixing procedure preserved the worldsheet N=2 superconformal invariance of the twistor-string, it broke the target-space SO(9,1) super-Poincar\'e invariance down to an SU(4)xU(1) subgroup. In this paper, generators for the SO(9,1) super-Poincar\'e transformations, as well as manifestly covariant vertex operators, are explicitly constructed out of the gauge-fixed matter fields. The earlier calculated amplitudes are then expressed in manifestly Lorentz-covariant notation.

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