On Fine Structure of Strings: The Universal Correction to the Veneziano Amplitude

TL;DR

This paper investigates the high-energy behavior of four-point scattering amplitudes in theories with higher spin particles, revealing a universal correction to the Veneziano amplitude using string models and theoretical techniques.

Contribution

It identifies and computes a universal sub-leading correction to the Veneziano amplitude at high energies, employing string models, holography, and bootstrap methods.

Findings

The first sub-leading correction to the Veneziano amplitude is universal.

The correction is computed using a relativistic string model with massive endpoints.

The correction's universality is supported by holography, effective string theory, and bootstrap techniques.

Abstract

We consider theories of weakly interacting higher spin particles in flat spacetime. We focus on the four-point scattering amplitude at high energies and imaginary scattering angles. The leading asymptotic of the amplitude in this regime is universal and equal to the corresponding limit of the Veneziano amplitude. In this paper, we find that the first sub-leading correction to this asymptotic is universal as well. We compute the correction using a model of relativistic strings with massive endpoints. We argue that it is unique using holography, effective theory of long strings and bootstrap techniques.