Work

Color-factor symmetry and BCJ relations for QCD amplitudes

Year: 2016

Type: article

Abstract: Tree-level n-point gauge-theory amplitudes with n − 2k gluons and k pairs of (massless or massive) particles in the fundamental (or other) representation of the gauge group are invariant under a set of symmetries that act as momentum-dependent shifts on the color factors in the cubic decomposition of the amplitude. These symmetries lead to gauge-invariant constraints on the kinematic numerators. They also directly imply the BCJ relations among the Melia-basis primitive amplitudes previously obtained by Johansson and Ochirov.

Source: Journal of High Energy Physics

DOI: 10.1007/jhep11(2016)060

Authors: Robert W. Brown, Stephen G. Naculich

Institutions: Case Western Reserve University, Bowdoin College, University of Michigan

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: National Science Foundation, Simons Foundation, University of Michigan, Case Western Reserve University

Awards: RUI: Supersymmetric Gauge Theory and String Theory, PFI: BIC- Advancing a Magnetic Resonance Imaging (MRI) Design Discovery from Physics to the Emerging Imaging Marketplace, G6903808765