Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: T-duality and spacetime supersymmetry   We analyze in detail the possible breaking of spacetime supersymmetry under
T-duality transformations. We find that when appropiate world-sheet effects are
taken into account apparent puzzles concerning supersymmetry in spacetime are
solved. We study T-duality in general heterotic $\sigma$-models analyzing
possible anomalies, and we find some modifications of Buscher's rules. We then
work out a simple but representative example which contains most of the
difficulties. We also consider the issue of supersymmetry versus duality for
marginal deformations of WZW models and present a mechanism that restores
supersymmetry dynamically in the effective theory.

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The categories of this paper are: patt-sol
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin