

SelectInterference = {qQCD -> 0};

Approximation = "lew";

(* ew corrections, no tau and nu_tau, no quarks in loop, no photon self-energies *)

lepew = {
  InsertFieldsOptions -> {Restrictions -> {ExcludeParticles -> {V[4 | 5],U[5],S[1 | 2 | 3], F[1, {3}], F[2, {3}], F[4, __], F[3, __]}}},
  SelectLoopDiagrams -> ( Not[ContainsFermionLoop[##] && NLegsOnLoop[2][##] && ParticlesOnLoop[V[1], 2][##]]  &),
  QED -> 0
};

SetParameters = JoinOptions[{MM -> MM, ME -> ME}];

(* eexaa *)    AddProcess[FeynArtsProcess -> {F[2,{1}], -F[2,{1}]} -> {V[1], V[1]}, Sequence @@ lepew];
(* eexaaa *)   AddProcess[FeynArtsProcess -> {F[2,{1}], -F[2,{1}]} -> {V[1], V[1], V[1]}, Sequence @@ lepew];
(* eexaaaa *)  AddProcess[FeynArtsProcess -> {F[2,{1}], -F[2,{1}]} -> {V[1], V[1], V[1], V[1]}, Sequence @@ lepew];
