Two-Loop Four-Gluon Amplitudes from Numerical Unitarity

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

doi:10.1103/physrevlett.119.142001

Title: Two-Loop Four-Gluon Amplitudes from Numerical Unitarity

Journal Article · Thu Oct 05 00:00:00 EDT 2017 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.119.142001· OSTI ID:1541230

Abreu, S. ^[1]; Cordero, F. Febres ^[1]; Ita, H. ^[1]; Jaquier, M. ^[1]; Page, B. ^[1]; Zeng, M. ^[2]

Univ. of Freiburg (Germany). Inst. of Physics
Univ. of California, Los Angeles, CA (United States). Mani L. Bhaumik Inst. for Theoretical Physics. Dept. of Physics and Astronomy

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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Research Organization:: Univ. of California, Los Angeles, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: SC0009937

OSTI ID:: 1541230

Alternate ID(s):: OSTI ID: 1398151

Journal Information:: Physical Review Letters, Vol. 119, Issue 14; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 48 works

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