2004/10/31 by Ruth Britto, Freddy Cachazo, Bo Feng · 4 citations
Mathematics · Physics and Astronomy · #Amplitude #Anomaly (physics) #Artificial intelligence #Black Holes and Theoretical Physics #Class (philosophy) #Combinatorics #Computer science #Gluon #Helicity #Holomorphic function #Loop (graph theory) #Mathematical analysis #Mathematical physics #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Unitarity #hep-th
paper · pdf · doi:10.1103/physrevd.71.025012
published as Phys.Rev. D71 (2005) 025012 · 30 pages, harvmac, 2 figures. v2: Minor corrections, typos fixed, Appendix B added. v3: Note added at end of introduction, paragraph added in section 2
arxiv created 2004/11/05 · openalex publication_date 2005/01/31 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose a systematic way to carry out the method introduced in F. Cachazo, hep-th/0410077 for computing certain unitarity cuts of one-loop N=4 amplitudes of gluons. We observe that the class of cuts for which the method works involves all next-to-MHV n-gluon one-loop amplitudes of any helicity configurations. As an application of our systematic procedure, we obtain the complete seven-gluon one-loop leading-color amplitude A7;1(1^\ensuremath-,2^\ensuremath-,3^\ensuremath-,4+,5+,6+,7+).