A Covariant Method for Calculating Helicity Amplitudes

Details A Covariant Method for Calculating Helicity Amplitudes A Covariant Method for Calculating Helicity Amplitudes

1995-11-15

arxiv.org/abs/hep-ph/9511318v1

Phys.Rev. D53 (1996) 5286-5292; Erratum-ibid. D56 (1997) 6037-6038

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 2 postscript figures, uses Latex2e and associated macros. Tex and Postcript files available via anonymous ftp at f

Scientific paper

10.1103/PhysRevD.56.6037

We present an alternative approach for calculating helicity amplitudes for processes involving both massless and massive fermions. With this method one can easily obtain covariant expressions for the helicity amplitudes. The final expressions involve only four vector products and are independent of the basis for gamma matrices or specific form of the spinors. We use the method to obtain the helicity amplitudes for several processes involving top quark production.

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