2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/186402In 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 $α'$ equivalent modulo field redefinitions to heterotic string effective actions computed by different methods.7 pagesHigh Energy Physics - Theorytext