Automated mass spectrum generation for new physics

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.

11 pages, 1 table; version accepted by EPJC

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• Event generation with SHERPA 1.1
• Herwig++ Physics and Manual
• FeynRules - Feynman rules made easy
• MadAnalysis 5, a user-friendly framework for collider phenomenology
• Basis-independent methods for the two-Higgs-doublet model II. The significance of tan(beta)
• Beyond the Minimal Supersymmetric Standard Model: from theory to phenomenology
• SLHAplus: a library for implementing extensions of the standard model

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