Simulating spin-3/2 particles at colliders

Support for interactions of spin- particles is implemented in the FeynRules and ALOHA packages and tested with the MadGraph 5 and CalcHEP event generators in the context of three phenomenological applications. In the first, we implement a spin- Majorana gravitino field, as in local supersymmetric models, and study gravitino and gluino pair-production. In the second, a spin- Dirac top-quark excitation, inspired from compositeness models, is implemented. We then investigate both top-quark excitation and top-quark pair-production. In the third, a general effective operator for a spin- Dirac quark excitation is implemented, followed by a calculation of the angular distribution of the s-channel production mechanism.