FeynRules 2.0 - A complete toolbox for tree-level phenomenology (1310.1921v2)

Abstract: FeynRules is a Mathematica-based package which addresses the implementation of particle physics models, which are given in the form of a list of fields, parameters and a Lagrangian, into high-energy physics tools. It calculates the underlying Feynman rules and outputs them to a form appropriate for various programs such as CalcHEP, FeynArts, MadGraph, Sherpa and Whizard. Since the original version, many new features have been added: support for two-component fermions, spin-3/2 and spin-2 fields, superspace notation and calculations, automatic mass diagonalization, completely general FeynArts output, a new universal FeynRules output interface, a new Whizard interface, automatic 1 to 2 decay width calculation, improved speed and efficiency, new guidelines for validation and a new web-based validation package. With this feature set, FeynRules enables models to go from theory to simulation and comparison with experiment quickly, efficiently and accurately.

• The paper introduces an updated software suite that automates tree-level mass diagonalization and extends particle support, including supersymmetric models and higher-spin particles.
• The paper leverages advanced supersymmetric computations and streamlined interfaces with major Monte Carlo event generators to bridge theory with experimental data.
• The paper demonstrates improved efficiency and robust validation processes that transform theoretical particle physics models into practical simulation frameworks.

Overview of " 2.0 - A Complete Toolbox for Tree-Level Phenomenology"

The academic paper introduces version 2.0 of , a software suite that facilitates the implementation and analysis of particle physics models at the tree level. This updated version provides an extensive array of tools designed to transition theoretical models into simulations, enabling efficient comparison with experimental data. It builds upon the original release by incorporating numerous enhancements, including support for new particle types and interactions, automatic processes for mass diagonalization, and validation mechanisms.

Key Features and Enhancements

The enhancements in version 2.0 of are extensive, catering to a broad audience within the high-energy physics community:

1. Extended Particle Support: The software now supports two-component fermions, as well as particles with spins of 3/2 and 2. This flexibility allows for the modeling of more complex particles beyond the Standard Model.
2. Advanced Supersymmetric Calculations: includes a module for handling supersymmetric models directly using superfields and the ability to automatically perform superspace computations. This streamlines the process for users involved in supersymmetric model analysis.
3. Automatic Mass Diagonalization: A critical update is the ability to automatically derive tree-level mass matrices, progressing towards the automatic mass diagonalization of models. This aids in the precise calculation of the particle spectrum.
4. Enhanced Interfaces: The suite provides updated interfaces to major Monte Carlo event generators such as , , and , alongside a novel Universal Output format for broad compatibility.
5. Validation and Efficiency: comes with improved computational efficiency and new guidelines for model validation, including a web-based validation package facilitating cross-verification of model implementations between theorists and experimentalists.
6. User-Friendly Model Building: With features like automated calculations for basic decay processes and expanded index management, users can swiftly develop and test theoretical models with nuanced control over model parameters and interactions.

Practical and Theoretical Implications

The advancements in allow researchers to more effectively bridge the gap between theoretical particle physics and experimental verification. By simplifying the transition from abstract models to interpretable data through simulations, the tool accelerates the identification of new particles and interactions. Furthermore, its capabilities in handling complex gauge theories and supersymmetric conditions make it indispensable in exploring physics beyond the Standard Model, including challenges related to dark matter and neutrino masses.

Future Prospects

While primarily targeted at tree-level phenomenologies, the modular nature of suggests potential expansions into higher-order computations, paving the way for even more precise theoretical predictions. The ongoing development of interfaces with next-generation simulation frameworks, combined with broadening support for diverse model classes, indicates a persistent commitment to enhancing the tool’s utility in predicting new physics scenarios.

Overall, version 2.0 of provides a comprehensive environment that empowers physicists to conduct more efficient and reliable theoretical explorations. As the field of high-energy physics pushes into new territories, such tools will remain critical in bridging theory with empirical discovery.