Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: BPS Mass, Dirichlet Boundary Condition, and the Isotropic Coordinate
  System   We consider test strings and test branes ending on D$p$-branes ($p\le 6$) and
NS5-branes in the background, for a heuristic understanding of the dynamics.
Whenever some supersymmetry is preserved, a simple BPS bound appears, but the
central charge in question is measured by certain isotropic coordinate system,
rather than by the actual spacetime geometry. This way, the ground state energy
is independent of the gravitational radii of the solitonic background.
Furthermore, a perturbation around the supersymmetric ground states reveals
that the appropriate Dirichlet boundary condition is dynamically induced. We
close with comments.

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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: chem-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: math
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The categories of this paper are: astro-ph
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: adap-org