Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The First Gauge Theory of Weak Interactions and the Prediction of Weak
  Neutral Currents   The three theoretical and historical components of the Standard Model are the
exact chiral gauge theory of weak interactions, electroweak unification, and
the Higgs mechanism for spontaneous symmetry breaking. I put into historical
perspective my 1958 invention of the first gauge theory of weak interactions,
predicting weak neutral currents, and show how the fundamental differences
between global and gauge symmetries and between partial flavour and exact gauge
symmetries, emerged in the strong and weak interactions. Although
renormalizability is necessary for theoretical consistency, electroweak
unification was not necessary, in principle. An interesting difference appears
between the $\sin^2{\theta_W}=0$ limit of the electroweak theory and the
original $SU(2)_W$ gauge theory of weak interactions. While the electroweak
mixing angle might have had any value (including zero), historically the value
$\sin^2{\theta_W} \sim 0.3$ actually observed in weak neutral currents gave
circumstantial support for the Standard Model and stimulated the search for
$W-$ and $Z-$mesons.

29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th