Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Dynamical Scheme for a Large CP-Violating Phase   A dynamical scheme where the third generation of quarks plays a distinctive
role is implemented. New interactions with a $\theta$ term induce the breaking
of the electroweak symmetry and the top-bottom mass splitting. A large
CP-violating phase naturally follows from the latter.

3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph