Universal Subleading Spectrum of Effective String Theory

TL;DR

This paper investigates the spectrum of an effective string model, revealing that the leading corrections beyond the Casimir term are universally determined by Poincare invariance, regardless of specific model details.

Contribution

It demonstrates the universal nature of subleading spectral terms in Poincare invariant effective string theories due to symmetry constraints.

Findings

Leading corrections are universal and follow from Poincare invariance.

Spectrum analysis confirms the universality of subleading terms.

Results apply to a broad class of effective string models.

Abstract

We analyse the spectrum of the D-dimensional Poincare invariant effective string model of Polchinski and Strominger. It is shown that the leading terms beyond the Casimir term in the long distance expansion of the spectrum have a universal character which follows from the constraint of Poincare invariance.