Abstract
Basing on the Slavnov-Taylor identities, we derive a new prescription to obtain gauge invariant tree-level scattering amplitudes for the process g * g → N g within high energy factorization. Using the helicity method, we check the formalism up to several final state gluons, and we present analytical formulas for the the helicity amplitudes for N = 2. We also compare the method with Lipatov’s effective action approach.
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van Hameren, A., Kotko, P. & Kutak, K. Multi-gluon helicity amplitudes with one off-shell leg within high energy factorization. J. High Energ. Phys. 2012, 29 (2012). https://doi.org/10.1007/JHEP12(2012)029
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DOI: https://doi.org/10.1007/JHEP12(2012)029