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Simulating spin- $\frac{3}{2}$ particles at colliders

2013; Springer Science+Business Media; Volume: 73; Issue: 10 Linguagem: Inglês

10.1140/epjc/s10052-013-2580-x

1434-6052

Neil D. Christensen, Priscila de Aquino, Nicolas Deutschmann, Claude Duhr, Benjamin Fuks, Camilo García-Cely, Olivier Mattelaer, Kentarou Mawatari, Bettina Oexl, Yoshitaro Takaesu,

Black Holes and Theoretical Physics

Support for interactions of spin-3/2 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-3/2 Majorana gravitino field, as in local supersymmetric models, and study gravitino and gluino pair-production. In the second, a spin-3/2 Dirac top-quark excitation, inspired from compositness 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-3/2 Dirac quark excitation is implemented, followed by a calculation of the angular distribution of the s-channel production mechanism.