Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the evaluation of universal non-perturbative constants in O(N) sigma
  models   We investigate the relation between on-shell and zero-momentum
non-perturbative quantities entering the parametrization of the two-point
Green's function of two-dimensional non-linear O(N) sigma models. We present
accurate estimates of ratios of mass-scales and renormalization constants,
obtained by an analysis of the strong-coupling expansion of the two-point
Green's function. These ratios allow to connect exact known on-shell results
with typical zero-momentum lattice evaluations. Our results are supported by
the 1/N-expansion.

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The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
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The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
2
The categories of this paper are: math
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys