Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A tachyon lump in closed string field theory   We find a codimension one lump solution of closed bosonic string field
theory. We consider vertices up to quartic order and include in the string
field the tachyon, the ghost dilaton, and a metric fluctuation. While the
tachyon profile clearly is that of a lump, we observe that the ghost dilaton is
roughly constant in the direction transverse to the lump, equal to the value it
takes in the nonperturbative tachyon vacuum. We explain, with a simple model,
why this should be expected.

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The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
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The categories of this paper are: q-alg
2
The categories of this paper are: math
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: astro-ph
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The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an