Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: CP Violation and the Light Quark Sector   In view of the observed strong hierarchy of quark masses, we discuss a new
description of flavor mixing which is particularly suited for models of quark
mass matrices based on flavor symmetries. The necessary and sufficient
conditions for CP violation are clarified. The emergence of CP violation is
primarily linked to a large phase difference (near 90^{\circ}) in the light
quark sector. The unitarity triangle is determined by the mass ratios of the
light quarks. We conclude that the unitarity triangle should be close or
identical to a rectangular triangle, and CP violation is maximal in this sense.

35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph