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arxiv 0704.2798 v2 pith:SOA7NRWI submitted 2007-04-20 hep-ph

On-Shell Methods in Perturbative QCD

classification hep-ph
keywords amplitudesmethodson-shellperturbativeaspectscollidercomputingconstruction
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We review on-shell methods for computing multi-parton scattering amplitudes in perturbative QCD, utilizing their unitarity and factorization properties. We focus on aspects which are useful for the construction of one-loop amplitudes needed for phenomenological studies at the Large Hadron Collider.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Perturbative construction of amplitudes from on-shell trees with vacuum pairs: the all-plus four-gluon amplitude through order $\boldsymbol{g}^{\boldsymbol{6}}$

    hep-th 2026-06 unverdicted novelty 7.0

    An on-shell construction using BCFW trees plus vacuum-pair phase-space integrals with inclusion-exclusion signs reproduces the known one- and two-loop all-plus four-gluon amplitudes.

  2. Two-loop all-plus helicity amplitudes for self-dual Higgs boson with gluons via unitarity cut constraints

    hep-ph 2025-11 unverdicted novelty 7.0

    Two-loop all-plus helicity amplitudes for self-dual Higgs plus gluons are obtained via four-dimensional unitarity cuts into one-loop and tree amplitudes plus finite-field tensor reduction.