R-symmetry of heterotic N=2 supergravities

TL;DR

This paper investigates the R-symmetry in heterotic N=2 supergravities, focusing on topological twists, instanton equations, and quantum corrections to understand their symmetry properties.

Contribution

It analyzes the realization of R-symmetry in effective supergravities from heterotic compactifications and explores conditions under quantum corrections.

Findings

Derived instanton equations for topological gauge-fixings.

Identified conditions for R-symmetry in quantum-corrected theories.

Clarified the role of R-symmetry in topological twists of supergravities.

Abstract

The topological twist of N=2, D=4 matter-coupled supergravities requires a suitable R-symmetry. This symmetry is realised in the effective supergravities arising at tree level from certain heterotic compactifications. The set of instanton equations (topological gauge-fixings) is thus obtained. The conditions that R-symmetry should satisfy also when these theories are replaced by their ``exact'' quantum-corrected counterparts are investigated.