•Generation of coupling files

The amplitude is transformed to FeynArts notation:

mfa = FCToFA[melsimplified] ;

Terms are collected according to momenta:

mfacoll = Collect[Expand[mfa], {FourVector[__] * ParticleMass[__]^2, FourVector[__] * MomentaScalarProduct[__]}] ;

The coupling vectors for the FeynArts model files are generated and saved:

gencoup = GenericCoupling[mfacoll] ; gencoup

{p _ 2 _ μ _ 1 (p _ 2 ° p _ 3), p _ 3 _ μ _ 1 (p _ 2 ° p _ 3), p _ 2 _ μ _ 1 (p _ 1 ° p _ 3), p _ 3 _ μ _ 1 (p _ 1 ° p _ 2), p _ 2 _ μ _ 1 (m _ K^+^(ó  ))^2, p _ 3 _ μ _ 1 (m _ K^+^(ó  ))^2, p _ 2 _ μ _ 1 (m _ K^0^(ó  ))^2, p _ 3 _ μ _ 1 (m _ K^0^(ó  ))^2, p _ 2 _ μ _ 1 (m _ π^(ó  ))^2, p _ 3 _ μ _ 1 (m _ π^(ó  ))^2}

classcoup = ClassesCoupling[mfacoll] // Together ;

$VeryVerbose = 2 ;

CheckF[gencoup, XName[VertexFields -> {AxialVector[0][0], PhiMeson[0], PhiMeson[0]}, PerturbationOrder -> 4, PhiModel -> ChPTW3, XFileName -> Automatic] <> ".Gen"] ;

Using file name /home/fjob/.Mathematica/Applications/HighEnergyPhysics/Phi/CouplingVectors/ChPTW3A00P10P10o4.Gen

File exists, force evaluating

Saving

CheckF[classcoup, XName[VertexFields -> {AxialVector[0][0], PhiMeson[0], PhiMeson[0]}, PerturbationOrder -> 4, PhiModel -> ChPTW3, XFileName -> Automatic] <> ".Mod"] ;

Using file name /home/fjob/.Mathematica/Applications/HighEnergyPhysics/Phi/CouplingVectors/ChPTW3A00P10P10o4.Mod

File exists, force evaluating

Saving

$VeryVerbose = 0 ;

Converted by Mathematica  (July 10, 2003)