Constraining higher-spin S-matrices

A bstract There are various no-go theorems that tightly constrain the existence of local higher-spin theories with non-trivial S -matrix in flat space. Due to Yang-Mills theory scattering amplitudes, it makes sense revisit Weinberg’s soft theorem — a direct consequence Lorentz invariance does not take advantage unitarity and parity invariance. By working chiral representation originated from twistor theory, we show can be evaded is possible. In particular, more closely related number derivatives interactions rather than spins. We also observe all constraints imposed by gauge accompanied polynomials momentum emitted particle where zeroth order charge conservation law.