Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: D-instanton Induced Superpotential   We use string field theory to fix the normalization of the D-instanton
corrections to the superpotential involving the moduli fields of type II string
theory compactified on an orientifold of a Calabi-Yau threefold in the absence
of fluxes. We focus on $O(1)$ instantons whose only zero modes are the four
bosonic modes associated with translation of the instanton in non-compact
directions and a pair of fermionic zero modes associated with the two
supercharges broken by the instanton. We work with a generic superconformal
field theory and express our answer in terms of the spectrum of open strings on
the instanton. We analyse the contribution of multi-instantons of this kind to
the superpotential and argue that it vanishes when background fluxes are
absent.

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The categories of this paper are: astro-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org
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The categories of this paper are: alg-geom
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The categories of this paper are: math
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The categories of this paper are: gr-qc
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The categories of this paper are: stat
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The categories of this paper are: eess
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The categories of this paper are: cond-mat