Two-Loop Four-Gluon Amplitudes from Numerical Unitarity

S. Abreu, F. Febres Cordero, H. Ita, M. Jaquier, B. Page, and M. Zeng
Phys. Rev. Lett. 119, 142001 – Published 5 October 2017

Abstract

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.

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  • Received 7 June 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.142001

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Particles & Fields

Authors & Affiliations

S. Abreu1, F. Febres Cordero1, H. Ita1, M. Jaquier1, B. Page1, and M. Zeng2

  • 1Physikalisches Institut, Albert-Ludwigs-Universität Freiburg D–79104 Freiburg, Germany
  • 2Mani L. Bhaumik Institute for Theoretical Physics, UCLA Department of Physics and Astronomy, Los Angeles, California 90095, USA

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Issue

Vol. 119, Iss. 14 — 6 October 2017

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