Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The energy and stability of D-term strings   Cosmic strings derived from string theory, supergravity or any theory of
choice should be stable if we hope to observe them. In this paper we consider
D-term strings in D=4, N=1 supergravity with a constant Fayet-Iliopoulos term.
We show that the positive deficit angle supersymmetric D-term string is
non-perturbatively stable by using standard Witten-Nester techniques to prove a
positive energy theorem. Particular attention is paid to the negative deficit
angle D-term string, which is known to violate the dominant energy condition.
Within the class of string solutions we consider, this violation implies that
the negative deficit angle D-term string must have a naked pathology and
therefore the positive energy theorem we prove does not apply to it. As an
interesting aside, we show that the Witten-Nester charge calculates the total
gravitational energy of the D-term string without the need for a cut-off, which
may not have been expected.

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The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
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The categories of this paper are: funct-an
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
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The categories of this paper are: comp-gas
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The categories of this paper are: eess
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
3
The categories of this paper are: physics
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The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph