The $\mathcal {OSP}(2,2|16)$ superconformal theory is free!
arXiv:1208.1699 · doi:10.1007/JHEP11(2012)078
Abstract
The SuperConformal theory in three space-time dimensions with SO(16) $R$-symmetry, 128 bosons, and 128 fermions, cannot sustain interactions. This result is obtained using both light-cone superspace techniques which rely on algebraic consistency, and covariant methods which rely on SO(16) Fierz identities which fail to produce the desired algebra.
14 pages