Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SO(N) gauge theories in 2+1 dimensions: glueball spectra and confinement   We calculate the spectrum of light glueballs and the string tension in a
number of SO(N) lattice gauge theories in 2+1 dimensions, with N in the range
from N=3 to N=16. After extrapolating to the continuum limit and then to N=oo
we compare to the spectrum and string tension of the SU(N=oo) gauge theory and
find that the most reliably and precisely calculated physical quantities are
consistent in that limit. We also compare the glueball spectra of those pairs
of SO(N) and SU(N') theories that possess the same Lie algebra, i.e. SO(3) and
SU(2), SO(4) and SU(2)xSU(2), SO(6) and SU(4), and find that for the very
lightest glueballs the spectra are consistent within each such pair, as are the
string tensions and the couplings. Where there are apparent discrepancies they
are typically for heavier glueballs, where the systematic errors are much
harder to control. We calculate the SO(N) string tensions with a particular
focus on the confining properties of SO(2N+1) theories which, unlike SO(2N)
theories, possess a trivial centre. We find that for both the light glueballs
and for the string tension SO(2N) and SO(2N+1) gauge theories appear to form a
single smooth sequence.

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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: eess
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: cond-mat
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The categories of this paper are: cs
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The categories of this paper are: hep-ex
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The categories of this paper are: solv-int
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The categories of this paper are: stat
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The categories of this paper are: q-bio
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The categories of this paper are: mtrl-th