The PWA Expert System has been split up into QRules and AmpForm. Please use these packages instead!

By default, the dynamic terms in an amplitude model are set to \(1\) by the HelicityAmplitudeBuilder. The method set_dynamics() can then be used to set dynamics lineshapes for specific resonances.

In the following pages, we show how to insert custom dynamics and illustrate some of the lineshapes provided by the expertsystem.