Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Split string field theory I   We describe projection operators in the matter sector of Witten's cubic
string field theory using modes on the right and left halves of the string.
These projection operators represent a step towards an analytic solution of the
equations of motion of the full string field theory, and can be used to
construct Dp-brane solutions of the string field theory when the BRST operator
Q is taken to be pure ghost, as suggested in the recent conjecture by Rastelli,
Sen and Zwiebach. We show that a family of solutions related to the sliver
state are rank one projection operators on the appropriate space of half-string
functionals, and we construct higher rank projection operators corresponding to
configurations of multiple D-branes.

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The categories of this paper are: stat
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: supr-con
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The categories of this paper are: funct-an
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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: hep-lat
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph