Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Brane - Antibrane as a Defect of Tachyon Condensation   In a tachyon effective field theory of a non-BPS brane, we construct a
classical solution representing a parallel brane-antibrane. The solution is
made of a kink and an antikink placed at antipodal points of S^1. Estimation of
the brane energy suggests an excitation of a string connecting the two branes,
even though the theory is Abelian. We performed fluctuation analysis around the
obtained solution, and find the structure of the supersymmetry breaking by the
co-existence of the brane and the antibrane. We discuss possible processes of
the pair-annihilation of the brane defect.

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The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: adap-org
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The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: nlin
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The categories of this paper are: cs
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph
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The categories of this paper are: math-ph