Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmic Superstrings Stabilized by Fermions   We show that there exist massive perturbative states of the ten dimensional
Green-Schwarz closed superstring that are stabilized against collapse due to
presence of fermionic zero modes on its worldsheet. The excited fermionic
degrees of freedom backreact on the spacetime motion of the string in the same
way as a neutral persistent current would, rendering these string loops stable.
We point out that the existence of these states could have important
consequences as stable loops of cosmological size as well as long lived states
within perturbative string theory.

25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
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The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas