Name: ossama Date: 05/14/08-11:06:45 PM Z
hello,
i have:
Ma=SpinorUBar[k1,m].DiracMatrix[mu].SpinorU[p1,m].SpinorUBar[k2,m].DiracMatrix[mu].SpinorU[p2,m]
Mac=ComplexConjugate[Ma] /.mu->nu
amp=Ma Mac //Contract
amps=FermionSpinSum[amp]
but the output of FermionSpinSum does not has Traces, the above code is
for calculating the unpolorized feynman amplitude of the Moller
process.
can you help me