Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of universal extra dimensions on top-quark electromagnetic
  interactions   Universal extra dimensions, presumably observable at some high-energy scale,
would modify low-energy observables, being particularly relevant for physical
processes forbidden at tree level by the Standard Model. We address the
Kaluza-Klein contributions from the 5-dimensional Standard Model to the
anomalous magnetic moment and to branching ratios of electromagnetic decays of
the top quark. In accordance with present bounds on the compactification scale,
contributions to both quantities are found to be at least 3 orders of magnitude
below Standard-Model predictions.

3
The categories of this paper are: physics
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an