Abstract
It is shown that for spinorial charges Q ( L) ) α ( α = 1, 2, L = 1, …, S) satisfying the commutation relations {Q (L) α, Q (M) β} = ε αβa LMQ, {Q (L) α, Q (M)+ β} = cσ μ αβP μδ LM, [Q (L)) α, P μ] = 0, where Q is a scalar charge commuting with the spinor charges as well aswith the energy- momentum vector Pμ, there can exist several different multiplets for free massive scalar and spinor fields.
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