Massive quark-gluon scattering amplitudes at tree level
- 14 January 2008
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 77 (2) , 025011
- https://doi.org/10.1103/physrevd.77.025011
Abstract
Results for four-, five-, and six-parton tree amplitudes for massive quark-antiquark scattering with gluons are calculated using the recursion relations of Britto, Cachazo, Feng, and Witten. The required diagrams are generated using shifts of the momenta of a pair of massless legs to complex values. Checks verifying the calculations are described, and a simple formula for the shifted spinors of an internal gluon is presented.Keywords
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