feynlag.parameters¶
Model parameters: external (experiment-fixed) vs internal (derived).
ExternalParameter: fixed by experiment (v,m_h,g…), carries a numeric value for benchmarks / UFO param cards.InternalParameter: derived from other parameters via a SymPy expression (tadpole solutions, mixing angles, inverted quartics). The expression may be assigned later by the pipeline.ParameterSet: dependency DAG over internal parameters with topological ordering, full symbolic resolution and numeric evaluation — exactly what a UFOparameters.pyneeds.
Classes
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Parameter fixed by experiment; input of the model. |
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Parameter derived from others via |
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Wraps a SymPy Symbol with physics metadata. |
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Collection of parameters with dependency resolution. |