The Problem of Mass and Mass Generation

TL;DR

This paper discusses the unresolved problem of fermion mass origin in particle physics, exploring attempts to explain the hierarchical mass spectrum through symmetries and their relation to flavor mixing angles.

Contribution

It reviews existing approaches to explaining fermion mass hierarchies and highlights the unresolved nature of the mass problem within the Standard Model.

Findings

Fermion masses remain unexplained within current frameworks.

Symmetry-based models attempt to relate mass eigenvalues to flavor mixing.

The origin of fermion mass hierarchy is still an open problem.

Abstract

The mass problem in particle physics for other fields is discussed. While the problem of the nuclear masses has been resolved within the QCD framework, 3 parameters of the ``Standard Model'' are related to the fermion sector. The origin of the ferion masses remains unresolved. We discuss attempts to explain the observed hierarchical features of the mass spectrum by a symmetry. relating the mass eigenvalues to the flavor mixing angles.