Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stability of the B=2 hedgehog in the Skyrme model   We study the unstable modes of the baryon number two hedgehog of the Skyrme
model on a three dimensional spatial lattice. An expansion of the Skyrme
Lagrangian around the hedgehog configuration provides the equations of motion
for the fluctuation fields solvable numerically via a relaxation method. We
find the negative energy modes and, by evolving the excited hedgehog in time, a
breakup into two separated solitonic configurations is obtained. Different
paths of descent for the receding Skyrmions are presented and the possibility
of determining the metric structure of the collective-coordinate manifold is
discussed.

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The categories of this paper are: supr-con
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The categories of this paper are: acc-phys
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: mtrl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: econ
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The categories of this paper are: cond-mat
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The categories of this paper are: nlin
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph
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The categories of this paper are: physics
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The categories of this paper are: q-fin