Name: Barry Holstein (email_not_shown)
Date: 07/01/05-04:56:56 PM Z


Hello Forum: My problem is that I need to use FourDivergence on quantities between Dirac spinors. For example, if I were analytically differentiating, I would find

      FourDivergence[ScalarProduct[p,w]*SpinorUBar[p2,m]
          .GS[w].SpinorU[p1,m], FV[w, a]]=

          FV[p,a]*SpinorUBar[p2,m].GS[w].SpinorU[p1,m]
          +ScalarProduct[p,w]*SpinorUBar[p2,m].GA[a].SpinorU[p1,m]

However, when doing this operation in FeynCalc, only the first of these terms arises----there is no differentiation inside the Dirac spinor piece. Is there a way around this? Thanks.

                           Barry Holstein



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