IR Constraints on Gyromagnetic Ratios

TL;DR

This paper investigates the gyromagnetic ratios of high-spin particles in string theories, revealing a universal coupling pattern linked to the particles' symmetry properties, using soft theorems and string techniques.

Contribution

It introduces a universal form for gyromagnetic couplings of massive high-spin states in string theories, connecting their symmetry structure to their magnetic properties.

Findings

Derived a universal gyromagnetic ratio form for high-spin states.

Linked the gyromagnetic ratios to the symmetry properties of the states.

Analyzed the couplings in various string theory frameworks.

Abstract

In Bosonic, Heterotic and Type II theories, by employing soft theorems and string techniques, we analyze the gyromagnetic ratios of massive high spin particles coupled to Abelian gauge fields arising from the compactification of the metric and Kalb-Ramond fields. We derive a universal form for such couplings showing that mixed symmetry states of the leading Regge-trajectory, described by a Young-tableau with two rows, have a gyromagnetic ratio associated with each row.