The Heterotic Green-Schwarz Superstring on an N=(2,0) Super-Worldsheet

Abstract

By defining the heterotic Green-Schwarz superstring action on an N=(2,0) super-worldsheet, rather than on an ordinary worldsheet, many problems with the interacting Green-Schwarz superstring formalism can be solved. In the light-cone approach, superconformally transforming the light-cone super-worldsheet onto an N=(2,0) super-Riemann surface allows the elimination of the non-trivial interaction-point operators that complicate the evaluation of scattering amplitudes. In the Polyakov approach, the ten-dimensional heterotic Green-Schwarz covariant action defined on an N=(2,0) super-worldsheet can be gauge-fixed to a free-field action with non-anomalous N=(2,0) superconformal invariance, and integrating the exponential of the covariant action over all punctured N=(2,0) super-Riemann surfaces produces scattering amplitudes that closely resemble amplitudes obtained using the unitary light-cone approach.

33 pages

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