shenvitor
commented
1 month ago The notebooks introduced #17 and #18 only build a simple decay chain model, constructing pγ as a 'virtual' state (s channel) with single, fixed quantum numbers. This is not feasible for GlueX, where t channels dominate.
For this reason, a second set of project notebooks is developed in parallel that build the amplitude through pure SymPy (#13, see also ComPWA/RUB-EP1-AG#144). This does not use an amplitude builder for the decay chain, but should offer the flexibility to build up a correct formulation of the production mechanism. Additional constraints can be formulated from the final state in order to further simplify the amplitude model. As suggested by @bgrube, a nice example of this can be found in GlueX-doc-4788.
"Pomeron Exchange" 🤔
The notebooks introduced #17 and #18 only build a simple decay chain model, constructing $p\gamma$ as a 'virtual' state (s channel) with single, fixed quantum numbers. This is not feasible for GlueX, where t channels dominate.
For this reason, a second set of project notebooks is developed in parallel that build the amplitude through pure SymPy (#13, see also https://github.com/ComPWA/RUB-EP1-AG/issues/144). This does not use an amplitude builder for the decay chain, but should offer the flexibility to build up a correct formulation of the production mechanism. Additional constraints can be formulated from the final state in order to further simplify the amplitude model. As suggested by @bgrube, a nice example of this can be found in GlueX-doc-4788.