Name: Vladyslav Shtabovenko Date: 11/12/14-09:20:17 AM Z
Hi Mario,
in general, it shouldn’t matter whether one applies DiracSimplify before OneLoop or afterwards.
However, I’m not sure that I can reproduce the behavior you describe.
I tested your code on FeynCalc 8.2 and on the latest development
snapshot on GitHub but in both cases I got an identical result for I3
and I3w, namely
I*Pi^2*PL^2*(PL - 2*sw^2)*B0[Pair[Momentum[p],
Momentum[p]] -
2*Pair[Momentum[p], Momentum[q]] +
Pair[Momentum[q],
Momentum[q]], mi^2,
mW^2]*dm[a]^2*dm[f]*(mi + ds[k])*
(ds[p] - ds[q])*(StandardMatrixElement[
Spinor[-Momentum[p] + Momentum[q], mb, 1] .
DiracGamma[6] .
Spinor[-Momentum[p], 0, 1]] +
StandardMatrixElement[
Spinor[-Momentum[p] + Momentum[q], mb, 1] .
DiracGamma[7] .
Spinor[-Momentum[p], 0, 1]])
What do you get?
Also, could you please give some details on your configuration: FeynCalc version, Mathematica version, and operating system? Are you loading any other packages together with FeynCalc?
Cheers,
Vladyslav