Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-09-22
Proceedings of Science EPS-HEP 2009(402) JINR 2009( 95)
Physics
High Energy Physics
High Energy Physics - Phenomenology
Work presented at: HEP 2009 16-22 July 2009, Krakow, Poland AND Dspin-09,Dubna,Russia,Septembre 1-5, 2009
Scientific paper
We re express the fermion's probability amplitude as a trace over spinor indices, which formulation surprisingly does not exist in literature. This formulation puts the probabilty amplitude and the the probabilty(squared amplitude) of a given process on equal footing at the compuational level and this is our principal motivation to write the present paper. We test the power of the trace formula in three applications: Calculation of the charge-current of fermions by using symbolic programs, which current so far was only computable by hand, analytic compuation of the quark dipole magnetic moment, rendered less cumbersome, and finally Fiertz rearrangement identities now made more transparent.
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