3 papers
hep-th2021
Color-Kinematics Relation from the Feynman Diagram Perspective
C. S. Lam
Feynman diagrams for gluon tree amplitudes are studied in the Feynman gauge and in any number of spacetime dimensions. The color-kinematics combinations of numerato…
hep-th2020
CHY Theory for Several Fields
C. S. Lam
The Cachazo-He-Yuan (CHY) formula was originally proposed to describe on-shell scattering of particles from a single massless field. We present a method to modify it to include sev…
hep-th2018
Pfaffian Diagrams for Gluon Tree Amplitudes
C. S. Lam
Pfaffian diagrams are formulated to represent gluon amplitudes computed from the Cachazo-He-Yuan (CHY) formula. They may be regarded as a systematic regrouping of Feynman diagrams…