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BPS spectra and non-perturbative gravitational couplings in N=2,4 supersymmetric string theories
We study the BPS spectrum in D=4, N=4 heterotic string compactifications, with some emphasis on intermediate N=4 BPS states. These intermediate states, which can become short in N=2 compactifications, are crucial for establishing an S-T exchange symmetry in N=2 compactifications. We discuss the impl...
| Autores principales: | , , , , |
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| Lenguaje: | eng |
| Publicado: |
1995
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/0550-3213(96)00069-7 http://cds.cern.ch/record/293243 |