手性对称

Concepts of Elementary Particle Physics Pub Date : 2019-08-29 DOI:10.1093/oso/9780198812180.003.0014

M. Peskin

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引用次数: 0

摘要

本章介绍手性对称，当夸克的质量被设为零时，QCD获得的额外对称性。引入了自发对称性破缺的概念，并对QCD中手性对称性的自发破缺进行了解释。它引入了戈德斯通玻色子的概念，一种由于自发对称性破缺而质量为零的粒子，并解释了这个概念如何解释π和K介子的性质，并使我们能够确定夸克质量的潜在值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Chiral Symmetry

This chapter introduces chiral symmetry, the extra symmetry that QCD acquires when the masses of quarks are set to zero. It introduces the concept of spontaneous symmetry breaking and explains the spontaneous breaking of chiral symmetry in QCD. It introduces the concept of a Goldstone boson, a particle that has zero mass as the result of spontaneous symmetry breaking, and explains how this concept explains properties of the pi and K mesons and allows us to determine the underlying values of the quark masses.

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