Abstract
It is shown how tree-level multi-gluon helicity amplitudes with an arbitrary number of off-shell external gluons can be calculated via BCFW recursion. Compact expressions for helicity amplitudes for scattering processes of three and four gluons, with up to three of them off-shell, are presented. Also, maximum-helicity-violating configurations are identified for up to two off-shell gluons, and the expressions for their helicity amplitudes for an arbitrary number of on-shell gluons are derived.
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ArXiv ePrint: 1404.7818
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van Hameren, A. BCFW recursion for off-shell gluons. J. High Energ. Phys. 2014, 138 (2014). https://doi.org/10.1007/JHEP07(2014)138
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DOI: https://doi.org/10.1007/JHEP07(2014)138