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Fusing Gauge Theory Tree Amplitudes Into Loop Amplitudes
Z. Bern, L. Dixon, D. C. Dunbar +1
We identify a large class of one-loop amplitudes for massless particles that can be constructed via unitarity from tree amplitudes, without any ambiguities. One-loop amplitudes for…
Recent Progress in One-Loop Multi-Parton Calculations
Z. Bern, L. Dixon, D. C. Dunbar +1
We describe techniques that simplify the calculation of one-loop QCD amplitudes with many external legs, which are needed for next-to-leading-order (NLO) corrections to multi-jet p…
One-Loop Corrections to Two-Quark Three-Gluon Amplitudes
Z. Bern, L. Dixon, D. A. Kosower
We present the one-loop QCD amplitudes for two external massless quarks and three external gluons (). This completes the set of one-loop amplitudes needed for the next…
One-Loop Gauge Theory Amplitudes with an Arbitrary Number of External Legs
Z. Bern, L. Dixon, D. Dunbar +1
We review recent progress in calculations of one-loop QCD amplitudes. By imposing the consistency requirements of unitarity and correct behavior as the momenta of two legs become c…
One-Loop n-Point Gauge Theory Amplitudes, Unitarity and Collinear Limits
Z. Bern, L. Dixon, D. C. Dunbar +1
We present a technique which utilizes unitarity and collinear limits to construct ansatze for one-loop amplitudes in gauge theory. As an example, we obtain the one-loop contributio…
One-Loop N Gluon Amplitudes with Maximal Helicity Violation via Collinear Limits
Z. Bern, G. Chalmers, L. Dixon +1
We present a conjecture for the -gluon one-loop amplitudes with maximal helicity violation. The conjecture emerges from the powerful requirement that the amplitudes have the cor…