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| 1 | We present a new theory for free massive superspin Y = 3/2 irreducible representation of the 4D, N = 1 Super-Poincar´e group, which has linearized non-minimal supergravity (superhelicity Y = 3/2) as its massless limit. The theory is being described in terms of a real bosonic superfield Hαα˙ and two fermionic ones χα , uα. The new results will illuminate the underlying structure of auxiliary superfields required for the description of higher massive superspin systems. Keywords: superspin, superspace | 1320 | ||||