Relations for Massive Spinors

TL;DR

This paper introduces a new notation for massive spinors using pairs of massless spinors, simplifying relations and discussing high-energy limits and recursion relations for massive particles.

Contribution

It presents a novel 2-vector representation of massive spinors that simplifies derivations and avoids complex spinor indices.

Findings

Derived simple relations between massive spinors using the new notation

Discussed the high energy limit of three-point amplitudes

Commented on recursion relations involving massive particles

Abstract

Recently introduced massive spinors are written as 2-vectors consisting of two massless spinors with opposite helicities. With this notation a couple of relations between them can be derived easily, entirely avoiding the spinor indices. The high energy limit of three point amplitudes is discussed shortly. Finally we add some comments on recursion relations with massive particles.