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Simulating spin-frac{3}{2} particles at colliders |
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| Authors: | N. D. Christensen P. de Aquino N. Deutschmann C. Duhr B. Fuks C. Garcia-Cely O. Mattelaer K. Mawatari B. Oexl Y. Takaesu |
| Affiliation: | 1. PITTsburgh Particle physics, Astrophysics and Cosmology Center (PITT PACC), University of Pittsburgh, Pittsburgh, PA, 15260, USA 2. Theoretische Natuurkunde and IIHE/ELEM, Vrije Universiteit Brussel, and International Solvay Institutes, Pleinlaan 2, 1050, Brussels, Belgium 3. Université de Lyon, 69622, Lyon, France 4. Institut de Physique Nucléaire de Lyon, UMR5822, Université Lyon 1/CNRS/IN2P3, 4, rue Enrico Fermi, 69622, Villeurbanne Cedex, France 5. Institute for Theoretical Physics, ETH Zurich, 8093, Zurich, Switzerland 6. Institute for Particle Physics Phenomenology, University of Durham, Durham, DH1 3LE, UK 7. Theory Division, Physics Department, CERN, 1211, Geneva 23, Switzerland 8. Institut Pluridisciplinaire Hubert Curien/Département Recherches Subatomiques, Université de Strasbourg/CNRS-IN2P3, 23 Rue du Loess, 67037, Strasbourg, France 9. Physik-Department T30d, Technische Universit?t München, James-Franck-Stra?e, 85748, Garching, Germany 10. Centre for Cosmology, Particle Physics and Phenomenology (CP3), Université Catholique de Louvain, 1348, Louvain-la-Neuve, Belgium 11. Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA 12. Department of Physics and Astronomy, Seoul National University, Seoul, 151-742, Korea 13. School of Physics, Korea Institute for Advanced Study (KIAS), Seoul, 130-722, Korea |
| Abstract: | Support for interactions of spin- $frac{3}{2}$ 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- $frac{3}{2}$ Majorana gravitino field, as in local supersymmetric models, and study gravitino and gluino pair-production. In the second, a spin- $frac{3}{2}$ 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- $frac{3}{2}$ Dirac quark excitation is implemented, followed by a calculation of the angular distribution of the s-channel production mechanism. |
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