The Manifestly Sl(2;Z)-covariant Superstring

TL;DR

This paper introduces a superstring action that explicitly maintains Sl(2;Z) symmetry for type IIB superstrings and verifies its consistency with supergravity backgrounds.

Contribution

It provides the first manifestly Sl(2;Z)-covariant formulation of the type IIB superstring and demonstrates its kappa-symmetry on-shell.

Findings

Successfully constructs the covariant superstring action.

Proves kappa-symmetry in supergravity backgrounds.

Enhances understanding of duality symmetries in string theory.

Abstract

We present a manifestly Sl(2;Z)-covariant action for the type IIB superstring, and prove kappa-symmetry for on-shell IIB supergravity backgrounds.