Recursive equations for Majorana currents

TL;DR

This paper develops a systematic recursive method for computing scattering amplitudes involving Majorana fermions, addressing the challenge of defining fermion flow in off-shell current formalism.

Contribution

It introduces a formalism with explicit reversal of fermion currents for consistent recursive calculations with Majorana particles.

Findings

Provides a systematic recursive approach for Majorana fermions

Ensures consistent fermion flow in off-shell current calculations

Facilitates accurate amplitude computations involving Majorana fermions

Abstract

A recursive computation of scattering amplitudes including Majorana fermions requires a consistent definition of the fermion flow, which is introduced by Denner et al. in a diagrammatic setting. A systematic treatment in the off-shell current formalism is proposed, which involves explicit reversal of fermion currents.