Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The standard model and the constituents of leptons and quarks   A complete set of postulates of the standard model of the electroweak
interaction and mass generation is formulated and confirmed deriving the
Lagrangian for the standard model. A massive fermion is formed by a
right-handed and a left-handed elementary massless fermion, exchanging a scalar
doublet. The elementary massless fermions forming leptons belong to an
approximate SU(3) octet. The charges are quantised due to this symmetry.

12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas