The worldsheet low-energy limit of the AdS_4 x CP^3 superstring

TL;DR

This paper investigates the low-energy behavior of the AdS_4 x CP^3 superstring in a spinning string background, deriving a sigma-model that captures the dynamics of massless excitations relevant for infrared properties.

Contribution

It introduces a sigma-model with fermions for the massless modes of the superstring in the infinite spin limit, advancing understanding of the model's low-energy regime.

Findings

Derived a sigma-model describing massless excitations

Identified the infrared worldsheet properties of the superstring

Connected classical spinning solutions to low-energy effective theories

Abstract

We consider the AdS_4 x CP^3 IIA superstring sigma-model in the background of the "spinning string" classical solution, which possesses two Noether spins. In the limit when one of the spins is infinite there are massless excitations, which govern the infrared worldsheet properties of the model. We obtain a sigma-model of CP^3 with fermions, which describes the dynamics of these massless modes.