New Model of Higher-Spin Particle

TL;DR

This paper introduces a new higher-spin particle model that unifies previous formulations, revealing a master system with complex HS fields and a U(1) charge, and develops its twistorial representation.

Contribution

It presents a novel master model of higher-spin particles that unifies unfolded and supersymmetric formulations, with a twistorial approach and a characterization via U(1) charge.

Findings

Physical states are massless HS multiplets with a U(1) charge.

The model unifies different HS particle formulations as gauges of a master system.

Twistorial formulation and symmetry analysis of HS multiplets are developed.

Abstract

We elaborate on a new model of the higher-spin (HS) particle which makes manifest the classical equivalence of the HS particle of the unfolded formulation and the HS particle model with a bosonic counterpart of supersymmetry. Both these models emerge as two different gauges of the new master system. Physical states of the master model are massless HS multiplets described by complex HS fields which carry an extra U(1) charge q. The latter fully characterizes the given multiplet by fixing the minimal helicity as q/2. We construct the twistorial formulation of the master model and discuss symmetries of the new HS multiplets within its framework.