Spinors

Spinors are the mathematical objects describing fermion particles, with spin 1/2. There are several ways to think about them.

Papers on spinors

Andrew M. Steane, An Introduction to Spinors, undergraduate to starting graduate level

Discrete models of spin

Penrose's original paper on spin networks
Another early Penrose spin network paper

Education: videos

Mathematician Sir Michael Atiyah

Lex Friedman and Peter Woit

The Mystery of Spinors

Dirac Belt Trick

Dirac Belt Trick videos

Dirac belt trick, Topology, and Spin 1/2 particles

(This is really good!)