Yang-Mills planar loop integrands admit an off-shell recursion that organizes the pure-gluon sector into matrix form and incorporates ghost contributions, yielding a concrete two-loop strategy.
Then do the replacement:A aℓµAbℓν → ηµν/l2 ℓ,c bℓ baℓ →1/l 2 ℓ, andb bℓ caℓ → −1/l 2 ℓ together withk aℓ =−k bℓ =l ℓ
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Off-shell recursion for all-loop planar integrands in Yang-Mills theory
Yang-Mills planar loop integrands admit an off-shell recursion that organizes the pure-gluon sector into matrix form and incorporates ghost contributions, yielding a concrete two-loop strategy.