Chen Ning Yang Retrospective

TL;DR

This paper reviews Chen-Ning Yang's pivotal contributions to statistical mechanics and particle physics, highlighting his role in developing models, theorems, and frameworks that underpin the Standard Model of particle interactions.

Contribution

It provides a comprehensive retrospective on Yang's groundbreaking work, emphasizing his novel theories and their influence on modern physics.

Findings

Yang's generalizations of the Bethe Ansatz advanced solvable models.

He established the Lee-Yang circle theorem in statistical mechanics.

Yang's work on non-Abelian gauge theories laid foundations for the Standard Model.

Abstract

Chen-Ning Yang made important contributions to the theory of solvable models in statistical mechanics, including generalizations of the Bethe Ansatz, magnetization in the Ising model, the Lee-Yang circle theorem, and the Yang-Baxter equation. Most famously, Yang made transformative contributions to the current Standard Model of elementary particle interactions. The proposal of Yang and T. D. Lee, that left-right symetry (parity) is violated in weak particle decays, established that the primary currents involved in weak interactions are left handed. The work of Yang and R. L. Mills gave a framework for force carriers coupling to these currents that are non-Abelian generalizations of the electromagnetic photon, which unlike the electrically neutral photon, carry ``charges'' to which they self-couple . Two decades of work by others on quantization and mass-generation mechanisms then culminated in the Standard Model.