Eur. Phys. J. C (2013) 73: 2325
https://doi.org/10.1140/epjc/s10052-013-2325-x

Special Article - Tools for Experiment and Theory

Automated mass spectrum generation for new physics

¹ Institut Pluridisciplinaire Hubert Curien/Département Recherches Subatomiques, Université de Strasbourg/CNRS-IN2P3, 23 Rue du Loess, 67037, Strasbourg, France
² Interuniversity Institute for High Energies (IIHE), ELEM, and Theoretische Natuurkunde, Vrije Universiteit Brussel and The International Solvay Institutes, Pleinlaan 2, 1050, Brussels, Belgium
³ CERN, Theory Division, Physics Department, 1211, Geneva 23, Switzerland

^* e-mail: benjamin.fuks@iphc.cnrs.fr

Received: 28 January 2013
Published online: 26 February 2013

Abstract

We describe an extension of the FeynRules package dedicated to the automatic generation of the mass spectrum associated with any Lagrangian-based quantum field theory. After introducing a simplified way to implement particle mixings, we present a new class of FeynRules functions allowing both for the analytical computation of all the model mass matrices and for the generation of a C++ package, dubbed ASperGe. This program can then be further employed for a numerical evaluation of the rotation matrices necessary to diagonalize the field basis. We illustrate these features in the context of the Two-Higgs-Doublet Model, the Minimal Left-Right Symmetric Standard Model and the Minimal Supersymmetric Standard Model.