TASI Lectures on Flavor Physics

TL;DR

This review covers the current understanding of flavor physics, exploring theories beyond the standard model, flavor symmetries, mass hierarchies, grand unification, and potential new physics in B meson processes.

Contribution

It provides a comprehensive overview of various theoretical approaches to the flavor puzzle, including flavor symmetries, Froggatt-Nielsen mechanism, and grand unification, with insights into their implications.

Findings

Relation of quark masses and mixing angles via flavor symmetry

Explanation of mass hierarchy through Froggatt-Nielsen mechanism

Potential for new physics contributions in B meson processes

Abstract

This review is based on lectures on flavor physics given at TASI 2008. First I summarize our present knowledge on the fundamental parameters of the flavor sector. Then I discuss various scenarios going beyond the standard model which attempt to explain aspects of the "flavor puzzle". Relating quark masses and mixing angles via flavor symmetry is explored. Explaining the mass hierarchy via the Froggatt-Nielsen mechanism is reviewed and illustrated. Grand unification ideas are pursued to seek a pattern in the observed masses and mixings of quarks and leptons. Generating light fermion masses as radiative corrections is explained and illustrated. The popular solutions to the strong CP problem are summarized. Finally, specific processes in B meson system where significant new flavor contributions can arise are discussed.