On dilaton dependence of type II superstring action

TL;DR

This paper derives the type IIA superstring action from supermembrane theory, showing that background Ramond-Ramond fields include a dilaton-dependent exponential factor, highlighting the role of the dilaton in string interactions.

Contribution

It provides a derivation of the type IIA superstring action from supermembrane theory, emphasizing the dilaton dependence of Ramond-Ramond fields in the background.

Findings

Ramond-Ramond fields appear with an exponential dilaton factor

Superstring action derived via double dimensional reduction

Highlights dilaton's role in background fields

Abstract

The supersymmetric action of type IIA D=10 superstring in N=2a, D=10 supergravity background can be derived by double dimensional reduction of the action of supermembrane coupled to D=11 supergravity. We demonstrate that the background Ramond-Ramond fields appear in the resulting superstring action with an extra factor of exponential of the dilaton.