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On $R^4$ terms and MHV amplitudes in N = 5,6 supergravity vacua of Type II superstrings
We compute one-loop threshold corrections to $R^4$ terms in N= 5,6 supergravity vacua of Type II superstrings. We then discuss non-perturbative corrections generated by asymmetric D-brane instantons. Finally we derive generating functions for MHV amplitudes at tree level in N = 5, 6 supergravities.
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| Formato: | info:eu-repo/semantics/article |
| Lenguaje: | eng |
| Publicado: |
Adv. High Energy Phys.
2010
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1155/2011/479038 http://cds.cern.ch/record/1302208 |