Summary
This book presents Chen-ning Yang's formulation of the theory of weak interactions, developed in collaboration with Tsung-Dao Lee. Its central thesis is the unification of electromagnetic and weak forces through a gauge theory incorporating a spontaneously broken symmetry mechanism. The work elaborates on the mathematical framework required for this unification, detailing the construction of the gauge group SU(2) x U(1) and the role of Higgs fields in generating masses for gauge bosons and fermions.
Readers gain a deep understanding of the theoretical underpinnings of electroweak unification, including the properties of W and Z bosons, and the mechanism by which elementary particles acquire mass. It lays out the mathematical machinery that successfully describes phenomena like beta decay and neutrino scattering within a coherent quantum field theory, providing foundational knowledge for further study in particle physics.
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Key concepts
- Electroweak Theory — A unified description of the electromagnetic and weak forces.
- Spontaneous Symmetry Breaking — A mechanism where the ground state of a system lacks the symmetry of its underlying equations.
- Higgs Mechanism — The process by which elementary particles acquire mass through interaction with a scalar field.
- Gauge Bosons — Force-carrying particles, including the W and Z bosons of the weak interaction and the photon of electromagnetism.
- SU(2) x U(1) Gauge Group — The specific mathematical group underpinning the electroweak interaction.