Eur. Phys. J. C (2013) 73: 2580
https://doi.org/10.1140/epjc/s10052-013-2580-x

Special Article - Tools for Experiment and Theory

Simulating spin- particles at colliders

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 Universität München, James-Franck-Straße, 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

^* e-mail: kentarou.mawatari@vub.ac.be

Received: 20 August 2013
Published online: 1 October 2013

Abstract

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.