Continuous spin superparticle model

TL;DR

This paper develops a new superspace particle model for continuous spin representations of the Poincaré supergroup, including a detailed canonical formulation, constraint analysis, and quantization scheme.

Contribution

It introduces a novel superspace continuous spin superparticle model with a covariant constraint splitting and quantization approach.

Findings

Successfully constructed the superparticle model in 4D, N=1 superspace.

Derived a complete set of bosonic and fermionic constraints, with a covariant separation.

Quantized the model, obtaining superfield wave functions satisfying the continuous spin representation constraints.

Abstract

We construct a new model of a particle propagating in $4D$, ${\cal N}=1$ superspace that describes the dynamics of a continuous spin irreducible representation of the Poincar\'{e} supergroup. The model is characterized by two-component Weyl spinor additional even variables playing the role of extra coordinates. A canonical formulation, specific local fermionic $\kappa$-symmetry, and a compete system of bosonic and fermionic constraints are derived. All bosonic constrains are first-class, while fermionic constraints are a mixture of first and second classes. Using additional variables inherent in to the model, we split the fermionic constraints into first and second classes in a covariant way. Quantization of the model is carried out according to Dirac prescription imposing all the first-class constraints and half of the second-class constraints (Gupta-Bleuler procedure) on the wave function. At quantization, the fermionic constraints are written in terms of spinor supercovariant derivatives acting on superfields. The corresponding wave function, which is either a chiral or antichiral superfield, depends on additional variables and obeys the superfield constraints that define the continuous spin irreducible representation of the Poincar\'{e} supergroup in the superspace.