Four Dimensional String-String Solutions and Symmetries of String Effective Action

TL;DR

This paper explores four-dimensional string solutions derived from a ten-dimensional effective action, analyzing their symmetries and demonstrating how $O(d,d)$ transformations generate new background configurations.

Contribution

It introduces a method to generate new string backgrounds in four dimensions using $O(d,d)$ symmetry transformations on solutions.

Findings

String-like solutions are obtained from the reduced effective action.

Symmetry properties of the four-dimensional action are analyzed.

New background configurations are generated via $O(d,d)$ transformations.

Abstract

A string action is considered in four spacetime dimensions which is obtained by dimensionally reducing the ten dimensional effective action. The equations of motion admit string like solutions. The symmetry properties of the four dimensional action is discussed. It is shown that new background configurations can be generated by implementing suitable $O(d,d)$ transformations.