According to the superconformal algebra with N supersymmetries in 3+1 dimensions is given by the bosonic generators P μ μ , D , M μ μ ν ν , K μ μ , the U(1) R-symmetry A , the SU(N) R-symmetry T j i and the fermionic generators Q α α i , Q ¯ ¯ i α α ˙ ˙ , S i α α and S ¯ ¯ α α ˙ ˙ i . Here, μ μ , ν ν , ρ ρ , … … denote spacetime indices; α α , β β , … … left-handed Weyl spinor indices; α α ˙ ˙ , β β ˙ ˙ , … … right-handed Weyl spinor indices; and i , j , … … the internal R-symmetry indices.