Work

KLT-type relations for QCD and bicolor amplitudes from color-factor symmetry

Year: 2018

Type: article

Abstract: Color-factor symmetry is used to derive a KLT-type relation for tree-level QCD amplitudes containing gluons and an arbitrary number of massive or massless quark-antiquark pairs, generalizing the expression for Yang-Mills amplitudes originally postulated by Bern, De Freitas, and Wong. An explicit expression is given for all amplitudes with two or fewer quark-antiquark pairs in terms of the (modified) momentum kernel. We also introduce the bicolor scalar theory, the “zeroth copy” of QCD, containing massless biadjoint scalars and massive bifundamental scalars, generalizing the biadjoint scalar theory of Cachazo, He, and Yuan. We derive KLT-type relations for tree-level amplitudes of biadjoint and bicolor theories using the color-factor symmetry possessed by these theories.

Source: Journal of High Energy Physics

DOI: 10.1007/jhep03(2018)057

Authors: Robert W. Brown, Stephen G. Naculich

Institutions: Case Western Reserve University, Bowdoin College

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, Case Western Reserve University

Awards: RUI: Amplitudes in Gauge theory and Gravity, PFI: BIC- Advancing a Magnetic Resonance Imaging (MRI) Design Discovery from Physics to the Emerging Imaging Marketplace