Name: Johan Date: 08/18/10-05:00:25 PM Z
Hi!
Could someone please help me to understand why this calculation doesn’t seem to work
<<HighEnergyPhysics`FeynCalc`
Amp=FVD[q,\[Mu]]
FVD[q,\[Nu]]FVD[q,\[Rho]]FVD[q,\[Sigma]]FAD[{q,m},{q+Subscript[k,
4],m},{q-Subscript[k,1]-Subscript[k,
2],m},{q-Subscript[k, 2],m}]
test=ReleaseHold[Isolate[Factor1@Collect2[TID[Amp,q],q]//FCE,q]]
when this similar amplitude is performed in a couple of seconds
<<HighEnergyPhysics`FeynCalc`
Amp=FVD[q,mu] FVD[q,nu] FVD[q,al]
FVD[q,be] FAD[{q,mD},{q,Lambda},
{q,Lambda}, {p3+q,m1},{q-p4,m2}]
test=ReleaseHold[Isolate[Factor1@Collect2[TID[Amp,q],q]//FCE,q]]
Thanks a lot,
Johan