COVARIANT METHOD FOR CALCULATING HELICITY AMPLITUDES

Authors
VEGA R WUDKA J
Citation
R. Vega et J. Wudka, COVARIANT METHOD FOR CALCULATING HELICITY AMPLITUDES, Physical review. D. Particles and fields, 53(9), 1996, pp. 5286-5292
Citations number
22
Categorie Soggetti
Physics, Particles & Fields
Journal title
Physical review. D. Particles and fields → ACNP
ISSN journal
05562821
Volume
53
Issue
9
Year of publication
1996
Pages
5286 - 5292
Database
ISI
SICI code
0556-2821(1996)53:9<5286:CMFCHA>2.0.ZU;2-U
Abstract
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 a mplitudes. The final expressions involve only four-vector products and are independent of the basis for gamma matrices or specific form of t he spinors. We use tile method to obtain the helicity amplitudes for s everal processes involving top quark production.