Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quark masses and mixings in the standard model with heavy vector-like
  families   The extension of the standard model with pairs of the vector-like families is
studied. The quark mixing matrices for the left- and right-handed charged
currents, as well as those for the flavour changing neutral currents, the Z and
Higgs mediated, are found. Both the model independent parametrization for an
arbitrary case and an explicit realization for the case with one pair of the
heavy vector-like families are presented. The extension opens new prospects for
studying deviations from the standard model in the future experiments at high
energies.

2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat