Name: Dimitry Fedorov Date: 12/20/09-03:02:35 PM Z

DiracSimplify[GA[\[Alpha]].(GS[p] + m).GA[\[Alpha]]] gives needed result.

Regards, Dimitry Fedorov.

-—- Original Message —–
From: “hrchang” <[noreply_at_HIDDEN-E-MAIL]>
To: <[feyncalc_at_HIDDEN-E-MAIL]>
Sent: Sunday, December 20, 2009 4:18 PM
Subject: Contractions of Gamma matrices with each other

> Hello,
>
> I wonder how to use mathematica to calculate the contractions of Gamma
> matrices with each other, such as GA[\[Alpha]].(GS[p]+m).GA[\[Alpha]].
>
> Pre-thanks
>
> H.R.Chang
>