Supergravity from Bosonic String

TL;DR

This paper derives four-dimensional supergravity involving graviton and gravitino fields from the bosonic string action in 26 dimensions, utilizing the Principle of Equivalence.

Contribution

It presents a novel derivation of supergravity directly from bosonic string theory, connecting string actions to supergravity formulations.

Findings

Supergravity action obtained from bosonic string in 26 dimensions.

Explicit link established between string theory and supergravity.

Method demonstrates derivation of supergravity from fundamental string principles.

Abstract

Deser-Zumino supergravity action for the graviton and gravitino pair, in four dimensions is deduced from the Nambu-Goto string action of the 26 dimension using the Principle of Equivalence.