Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Supersymmetric D-branes on flux backgrounds   Several aspects concerning the physics of D-branes in Type II flux
compactifications preserving minimal N=1 supersymmetry in four dimensions are
considered. It is shown how these vacua are completely characterized in terms
of properly defined generalized calibrations for D-branes and the relation with
Generalized Complex Geometry is discussed. General expressions for
superpotentials and D-terms associated with the N=1 four-dimensional
description of space-time filling D-branes are presented. The massless spectrum
of calibrated D-branes can be characterized in terms of cohomology groups of a
differential complex canonically induced on the D-branes by the underlying
generalized complex structure.

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The categories of this paper are: stat
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
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The categories of this paper are: physics
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The categories of this paper are: eess
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The categories of this paper are: hep-ex
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: funct-an
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The categories of this paper are: econ
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The categories of this paper are: hep-ph
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The categories of this paper are: math-ph