Massive T-duality in six dimensions

TL;DR

This paper introduces a massive T-duality in six dimensions that relates K3 compactifications of Romans' theory and Type IIB theory through specific dimensional reductions, highlighting challenges in extending string-string duality.

Contribution

It presents a novel massive T-duality framework in six dimensions connecting two different string theory compactifications via Kaluza-Klein and Scherk-Schwarz reductions.

Findings

Maps Romans' theory to Type IIB on K3 via massive T-duality

Uses Kaluza-Klein and Scherk-Schwarz reductions to relate theories

Discusses difficulties in extending to massive string-string duality

Abstract

A massive version of T-duality in six dimensions is given, that maps the K3 compactification of Romans' theory onto the K3 compactification of Type IIB theory. This is done by performing a (standard) Kaluza-Klein reduction on six-dimensional massive Type IIA and a Scherk-Schwarz reduction on Type IIB, mapping both theories onto the same five-dimensional theory. We also comment shortly on the difficulties arising if one intends to construct a massive generalisation of the six-dimensional string-string duality.