Dynamical Superfield Theory of Free Massive Superspin-1 Multiplet

TL;DR

This paper develops a supersymmetric Lagrangian model for a massive superspin-1 superfield, revealing its component fields and structure, and explores its massless limit relating to gravitino dynamics.

Contribution

It introduces a new dynamical superfield model for massive superspin-1 multiplets with a one-parameter family of actions and analyzes its massless limit.

Findings

The model includes spin-1/2, spin-3/2, and spin-1 fields.

The superfield action structure is explicitly presented.

The massless limit corresponds to gravitino and superhelicity-1/2 multiplets.

Abstract

We construct an N=1 supersymmetric Lagrangian model for the massive superspin-1 superfield. The model is described by a dynamical spinor superfield and an auxiliary chiral scalar superfield. On-shell this model leads to a spin-1/2, spin-3/2 and two spin-1 propagating component fields. The superfield action is given and its structure in the fermionic component sector is presented. We prove that the most general theory is characterized by a one parameter family of actions. The massless limit is shown to correspond to the dynamics of both the gravitino and superhelicity-1/2 multiplets.