Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Variational study of mass generation and deconfinement in Yang-Mills
  theory   A very simple variational approach to pure SU($N$) Yang-Mills theory is
proposed, based on the Gaussian effective potential in a linear covariant
gauge. The method provides an analytical variational argument for mass
generation. The method can be improved order by order by a perturbative massive
expansion around the optimal trial vacuum. At finite temperature, a weak
first-order transition is found (at $T_c\approx 250$ MeV for $N=3$) where the
mass scale drops discontinuously. Above the transition the optimal mass
increases linearly as expected for deconfined bosons. The equation of state is
found in good agreement with the lattice data.

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The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ