Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Negative Baryon density and the Folding structure of the B=3 Skyrmion   The Skyrme model is a non-linear field theory whose solitonic solutions, once
quantised, describe atomic nuclei. The classical static soliton solutions,
so-called Skyrmions, have interesting discrete symmetries and can only be
calculated numerically. Mathematically, these Skyrmions can be viewed as maps
between to two three-manifolds and, as such, their stable singularities can
only be folds, cusps and swallowtails. Physically, the occurrence of
singularities is related to negative baryon density. In this paper, we
calculate the charge three Skyrmion to a high resolution in order to examine
its singularity structure in detail. Thereby, we explore regions of negative
baryon density. We also discuss how the negative baryon density depends on the
pion mass.

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The categories of this paper are: physics
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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
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The categories of this paper are: cs
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: eess
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The categories of this paper are: math-ph
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The categories of this paper are: adap-org
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The categories of this paper are: q-fin
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The categories of this paper are: cond-mat
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The categories of this paper are: astro-ph
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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: dg-ga