Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical Electroweak Breaking: Issues and Challenges   After briefly remarking on alternatives for breaking the electroweak
symmetry, I discuss the implication that recent precision experiments at LEP
have for the symmetry breaking sector. The difficulties associated with
generating fermion masses when the electroweak symmetry is broken dynamically
are exposed and an alternative to the walking technicolor - extended
technicolor scenario is suggested, based on models of substructure. Failures
and lessons from trying to incorporate families and mixing in these latter
schemes are also discussed.

33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg