BCFW recursion for off-shell gluons

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.

24 pages, report number corrected

References in corpus (9)

• Direct Proof Of Tree-Level Recursion Relation In Yang-Mills Theory
• New Recursion Relations for Tree Amplitudes of Gluons
• Multi-Parton Amplitudes in Gauge Theories
• High-Energy Factorization and Small-X Deep Inelastic Scattering Beyond Leading Order
• Gauge invariant effective action for high-energy processes in QCD
• Feynman rules for effective Regge action
• Helicity amplitudes for high-energy scattering
• Scattering amplitudes with off-shell quarks
• Multi-gluon helicity amplitudes with one off-shell leg within high energy factorization

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