Two-Loop Four-Gluon Amplitudes from Numerical Unitarity

Abreu, S.; Febres Cordero, F.; Ita, H.; Jaquier, M.; Page, B.; Zeng, M.

doi:10.1103/PhysRevLett.119.142001

Two-Loop Four-Gluon Amplitudes from Numerical Unitarity

Mar 15, 2017

6 pages

Published in:

Phys.Rev.Lett. 119 (2017) 14, 142001

Published: Oct 5, 2017

e-Print:

1703.05273 [hep-ph]

DOI:

10.1103/PhysRevLett.119.142001

Report number:

FR-PHENO-2017-007,
UCLA-17-TEP-103

View in:

ADS Abstract Service

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Abstract: (APS)

We present the first numerical computation of two-loop amplitudes based on the unitarity method. As a proof of principle, we compute the four-gluon process in the leading-color approximation. We discuss the new method, analyze its numerical properties, and apply it to reconstruct the analytic form of the amplitudes. The numerical method is universal, and can be automated to provide multiscale two-loop computations for phenomenologically relevant signatures at hadron colliders.

Note:

6 pages, 3 figures, Mathematica files for reconstructed analytic formulae

unitarity
quantum chromodynamics: correction
higher-order: 2
numerical calculations
numerical methods
CERN LHC Coll

References(55)

Figures(26)

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