Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chern-Simons Diffusion Rate near the Electroweak Phase Transition for
  $m_H \approx m_W$   The rate of $B$-violation in the standard model at finite temperature is
closely related to the diffusion rate $\Gamma$ of Chern-Simons number. We
compute this rate for $m_H \approx m_W$ in the classical approximation in an
effective SU(2)-Higgs model, using Krasnitz's algorithm. The parameters in the
effective hamiltonian are determined by comparison with dimensional reduction.
In the high temperature phase we find $\Gamma/V (\alpha_W T)^4 \approx 1$,
neglecting a finite renormalization. In the low temperature phase near the
transition we find the rate to be much larger than might be expected from
previous analytic calculations based on the sphaleron.

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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: physics
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The categories of this paper are: math
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The categories of this paper are: cond-mat
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: econ
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The categories of this paper are: funct-an
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The categories of this paper are: q-fin
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The categories of this paper are: cs
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The categories of this paper are: quant-ph
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The categories of this paper are: eess