Consistency Conditions on the S-Matrix of Massless Particles
| dc.creator | Benincasa, Paolo | |
| dc.creator | Cachazo, Freddy | |
| dc.date | 2007-05-29 | |
| dc.date | 2008-01-17 | |
| dc.date.accessioned | 2026-07-07T08:54:42Z | |
| dc.date.available | 2026-07-07T08:54:42Z | |
| dc.description | We introduce a set of consistency conditions on the S-matrix of theories of massless particles of arbitrary spin in four-dimensional Minkowski space-time. We find that in most cases the constraints, derived from the conditions, can only be satisfied if the S-matrix is trivial. Our conditions apply to theories where four-particle scattering amplitudes can be obtained from three-particle ones via a recent technique called BCFW construction. We call theories in this class constructible. We propose a program for performing a systematic search of constructible theories that can have non-trivial S-matrices. As illustrations, we provide simple proofs of already known facts like the impossibility of spin $s > 2$ non-trivial S-matrices, the impossibility of several spin 2 interacting particles and the uniqueness of a theory with spin 2 and spin 3/2 particles. | |
| dc.description | 30 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/0705.4305 | |
| dc.identifier | http://arxiv.org/abs/0705.4305 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/146034 | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Consistency Conditions on the S-Matrix of Massless Particles | |
| dc.type | text |