•Generation of coupling files

mfacoll = MomentaCollect[melsimplified // Expand, ParticlesNumber -> 6, PerturbationOrder -> 3]

(e^( ))^2 g^(μ _ 5 μ _ 6) ((7 i δ _ (3 I _ 3)^(2) δ _ (3 I _ 4)^(2) δ _ (I _ 1 I _ 2)^(2))/(4 (f _ π^(ó  ))^2) - (37 i δ _ (I _ 3 I _ 4)^(2) δ _ (I _ 1 I _ 2)^(2))/(12 (f _ π^(ó  ))^2) + (4 i δ _ (3 I _ 2)^(2) δ _ (3 I _ 4)^(2) δ _ (I _ 1 I _ 3)^(2))/(3 (f _ π^(ó  ))^2) + (11 i δ _ (3 I _ 2)^(2) δ _ (3 I _ 3)^(2) δ _ (I _ 1 I _ 4)^(2))/(12 (f _ π^(ó  ))^2) + (11 i δ _ (3 I _ 1)^(2) δ _ (3 I _ 4)^(2) δ _ (I _ 2 I _ 3)^(2))/(12 (f _ π^(ó  ))^2) - (9 i δ _ (I _ 1 I _ 4)^(2) δ _ (I _ 2 I _ 3)^(2))/(4 (f _ π^(ó  ))^2) + (4 i δ _ (3 I _ 1)^(2) δ _ (3 I _ 3)^(2) δ _ (I _ 2 I _ 4)^(2))/(3 (f _ π^(ó  ))^2) - (8 i δ _ (I _ 1 I _ 3)^(2) δ _ (I _ 2 I _ 4)^(2))/(3 (f _ π^(ó  ))^2) + (7 i δ _ (3 I _ 1)^(2) δ _ (3 I _ 2)^(2) δ _ (I _ 3 I _ 4)^(2))/(4 (f _ π^(ó  ))^2) + (5 i f _ (3 I _ 1 I _ 4)^(2) f _ (3 I _ 2 I _ 3)^(2))/(24 (f _ π^(ó  ))^2) + (5 i f _ (3 I _ 1 I _ 3)^(2) f _ (3 I _ 2 I _ 4)^(2))/(24 (f _ π^(ó  ))^2) + (5 i f _ (3 I _ 1 I _ 2)^(2) f _ (3 I _ 3 I _ 4)^(2))/(24 (f _ π^(ó  ))^2))

gencoup = GenericCoupling[mfacoll]

{(e^( ))^2 g^(μ _ 5 μ _ 6)}

classcoup = ClassesCoupling[mfacoll] // Together ; classcoup // StandardForm

{{(i (5 SU2F[3, I1, I4] SU2F[3, I2, I3] + 5 SU2F[3, I1, I3] SU2F[3, I2, I4] + 5 SU2F[3, I1, I2] SU2F[3, I3, I4] + 42 SUNDelta[3, I3] SUNDelta[3, I4] SUNDelta[I1, I2] + 32 SUNDelta[3, I2] SUNDelta[3, I4] SUNDelta[I1, I3] + 22 SUNDelta[3, I2] SUNDelta[3, I3] SUNDelta[I1, I4] + 22 SUNDelta[3, I1] SUNDelta[3, I4] SUNDelta[I2, I3] - 54 SUNDelta[I1, I4] SUNDelta[I2, I3] + 32 SUNDelta[3, I1] SUNDelta[3, I3] SUNDelta[I2, I4] - 64 SUNDelta[I1, I3] SUNDelta[I2, I4] + 42 SUNDelta[3, I1] SUNDelta[3, I2] SUNDelta[I3, I4] - 74 SUNDelta[I1, I2] SUNDelta[I3, I4]))/(24 DecayConstant[PseudoScalar[2], RenormalizationState[0]]^2)}}

$VeryVerbose = 2 ;

CheckF[gencoup, XName[VertexFields -> {Pion[0], Pion[0], Pion[0], Pion[0], Photon[0], Photon[0]}, PerturbationOrder -> 2, PhiModel -> ChPTPhoton2, XFileName -> Automatic] <> ".Gen"] ;

Using file name D:\\Program Files\\Wolfram Research\\Mathematica\\4.1\\AddOns\\Applications\\HighEnergyPhysics\\Phi\\CouplingVectors\\ChPTPhoton2P20P20P20P20V10V10o2.Gen

File does not exist, evaluating

Saving

CheckF[classcoup, XName[VertexFields -> {Pion[0], Pion[0], Pion[0], Pion[0], Photon[0], Photon[0]}, PerturbationOrder -> 2, PhiModel -> ChPTPhoton2, XFileName -> Automatic] <> ".Mod"] ;

Using file name D:\\Program Files\\Wolfram Research\\Mathematica\\4.1\\AddOns\\Applications\\HighEnergyPhysics\\Phi\\CouplingVectors\\ChPTPhoton2P20P20P20P20V10V10o2.Mod

File does not exist, evaluating

Saving

$VeryVerbose = 0 ;

Converted by Mathematica  (July 10, 2003)