MHV Vertices and Fermionic Scattering Amplitudes in Gauge Theory with Quarks and Gluinos

TL;DR

This paper extends the MHV vertex approach to gauge theories including quarks and gluinos, computing various scattering amplitudes and confirming their consistency with known results, thus broadening the applicability of this method.

Contribution

It introduces an extension of the Cachazo-Svrcek-Witten approach to include fermionic particles like quarks and gluinos in gauge theories.

Findings

All googly amplitudes with quarks and gluinos computed and verified.

Agreement with previously known results for these amplitudes.

Brief discussion on non-MHV amplitudes, including purely fermionic cases.

Abstract

The Cachazo-Svrcek-Witten approach to perturbative gauge theory is extended to gauge theories with quarks and gluinos. All googly amplitudes with quark-antiquark pairs and gluinos are computed and shown to agree with the previously known results. The computations of the non-MHV or non-googly amplitudes are also briefly discussed, in particular the purely fermionic amplitude with 3 quark-antiquark pairs.