Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generation non-universality and flavor changing neutral currents in the
  331 model   The 331 model, an extension of the standard electroweak theory to
$SU(3)_L\times U(1)_X$, naturally predicts three families of quarks and leptons
via the requirement of anomaly cancellation. This is accomplished by making one
of the quark families transform differently from the other two, thus leading to
flavor changing neutral currents. Using experimental input on neutral meson
mixing, we show that the third family must be the one that is singled out, at
least up to small family mixing. We additionally describe a convenient way to
parametrize the new mixing matrix that plays a role in the gauge interactions
of the ordinary quarks with the new 331 quarks.

16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom