Continuous spin superparticle model

I. L. Buchbinder; S. A. Fedoruk

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arXiv · 2506.19709

Continuous spin superparticle model

I. L. Buchbinder·S. A. Fedoruk

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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.

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I. L. Buchbinder, S. A. Fedoruk. 2025-06-24. Continuous spin superparticle model. https://arxiv.org/abs/2506.19709

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