alpha'-Corrections to Heterotic Superstring Effective Action Revisited

Abstract

In this letter we establish that the supersymmetric R^2 effective action for the heterotic string, obtained from the supersymmetrisation of the Lorentz Chern-Simons term, is to order ${\alpha }^{\prime }$ equivalent modulo field redefinitions to heterotic string effective actions computed by different methods.

7 pages

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