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Add BtoKpipigamma model in AmpGen

Preema Rennee Pais requested to merge ppais_BtoKpipig_AmpGen into Sim09

Updated Gen/AmpGen to:

  • include custom spin factors for B-> Kres gamma decays (this requires setting an additional parameter in the model .opt file, so would not affect any existing models/samples).
  • add a final state density matrix for cases in which there are two polarisation states.

Also added two B->Kpipigamma decay models in Gen/LbAmpGen.

To-do: Compare generated models against those produced with equivalent AmpGen fitter (based on GooFit/AmpGen)

Edited by Preema Rennee Pais

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