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Paper IPM / P / 16846  


Abstract:  
We construct, for the first time, an offshell supersymmetric continuous spin gauge theory in fourdimensional Minkowski spacetime, in both constrained and unconstrained Lagrangian formulations. As an extension to the onshell description \cite{Najafizadeh:2019mun}, we employ an auxiliary field to close the algebra of supersymmetry transformations offshell. The 4D $\mathcal{N}=1$ massless continuous spin supermultiplet is then denoted by $(\mathrm{\Phi}, \mathrm{H} \,; \mathrm{\Psi})$, comprised of a dynamical and a nondynamical complex scalar continuous spin gauge fields $\mathrm{\Phi}$ and $\mathrm{H}$, as well as a Dirac continuous spin gauge field $\mathrm{\Psi}$. In particular, we demonstrate that the continuous spin supermultiplet, in a limit, reproduces offshell supersymmetry transformations of the scalar (chiral) supermultiplet $(\,{\scriptstyle 0}\,,\, {\scriptstyle 1/2}\,)$, all integerspin supermultiplets $(\,s\,,\, s\, {\scriptstyle +\, 1/2}\,),\, s\geqslant1$, and all halfinteger spin supermultiplets $(\, s\, {\scriptstyle \, 1/2}\,,\, s \,\,),\, s\geqslant1$.
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