The generalized Bergshoeff-de Roo identification

Abstract

Abstract There are two main approaches to duality covariant first order higher derivative corrections to the heterotic string, one extending the duality structure and the other deforming the gauge transformations. In this paper we introduce a framework from which both approaches can be derived, proving their equivalence and extending them to higher orders.

Keywords

• String Duality
• Supergravity Models
• Superstrings and Heterotic Strings