Abstract
We compute the leading-color contributions to five-gluon scattering at two loops in massless QCD. The integrands of all independent helicity amplitudes are evaluated using d-dimensional generalized unitarity cuts and finite field reconstruction techniques. Numerical evaluation of the integral basis is performed with sector decomposition methods to obtain the first benchmark results for all helicity configurations of a 2→3 scattering process in QCD.
Highlights
Introduction.—As data continue to pour in from the Large Hadron Collider (LHC) experiments, the precision of many theoretical predictions for high-energy scattering processes is being challenged by experimental measurements
In this Letter, we demonstrate how new evaluation techniques based on generalized unitarity [6,7] and integrand reduction [8,9,10,11,12,13,14] can offer a solution to the traditional bottlenecks in these computations and present the first results for a complete set of planar five-gluon helicity amplitudes in QCD
The results extend previous results obtained for “all-plus” helicity amplitudes [15,16,17,18,19,20,21,22]
Summary
Introduction.—As data continue to pour in from the LHC experiments, the precision of many theoretical predictions for high-energy scattering processes is being challenged by experimental measurements. The integrands of all independent helicity amplitudes are evaluated using d-dimensional generalized unitarity cuts and finite field reconstruction techniques.
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