Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-Loop Calculation of the Anomalous Exponents in the
  Kazantsev--Kraichnan Model of Magnetic Hydrodynamics   The problem of anomalous scaling in magnetohydrodynamics turbulence is
considered within the framework of the kinematic approximation, in the presence
of a large-scale background magnetic field. Field theoretic renormalization
group methods are applied to the Kazantsev-Kraichnan model of a passive vector
advected by the Gaussian velocity field with zero mean and correlation function
$\propto \delta(t-t')/k^{d+\epsilon}$. Inertial-range anomalous scaling for the
tensor pair correlators is established as a consequence of the existence in the
corresponding operator product expansions of certain "dangerous" composite
operators, whose negative critical dimensions determine the anomalous
exponents. The main technical result is the calculation of the anomalous
exponents in the order $\epsilon^2$ of the $\epsilon$ expansion (two-loop
approximation).

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The categories of this paper are: patt-sol
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The categories of this paper are: quant-ph
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
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The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
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The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-ex