Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Heavy Top Quark and the $Zb\bar{b}$ Vertex in Non-Commuting Extended
  Technicolor   We explore corrections to electroweak parameters in the context of Extended
Technicolor (ETC) models in which the ETC gauge-boson which generates the
top-quark mass carries weak $SU(2)$ charge. For $m_t \sim 150$ GeV there exist
potentially large corrections to the $Z$ decay width to $b$-quarks.
Interestingly, in contrast to the situation in ETC models where the gauge-boson
which generates the top-quark mass is a weak $SU(2)$ singlet, the corrections
may {\it increase} the $Z \to b \bar{b}$ branching ratio.

1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin