Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electroweak Symmetry Breaking via a Technicolor Nambu--Jona-Lasinio
  Model   We consider a theory of gauge fields and fermions which we argue gives rise
to dynamics similar to that of the Nambu--Jona-Lasinio (NJL) model when a gauge
coupling constant is appropriately fine-tuned. We discuss the application of
this model to dynamical electroweak symmetry breaking by a top-quark
condensate. In this model, custodial symmetry is violated solely by
perturbatively weak interactions, and the top--bottom mass splitting is due to
the enhanced sensitivity to custodial symmetry violation near the critical
point. We also consider models in which electroweak symmetry is broken by new
strongly- interacting fermions with NJL-like dynamics. We argue that these
models require additional fine-tuning in order to keep corrections to the
electroweak $\rho$-parameter acceptably small.

24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat