We compute one-loop threshold corrections to R-4 terms in N = 5, 6 supergravity vacua of Type II superstrings. We then discuss nonperturbative corrections generated by asymmetric D-brane instantons. Finally we derive generating functions for MHV amplitudes at tree level in N = 5, 6 supergravities.
Bianchi, M. (2011). On R^4 terms and MHV amplitudes in N = 5,6 supergravity vacua of type II superstrings. ADVANCES IN HIGH ENERGY PHYSICS [10.1155/2011/479038].
On R^4 terms and MHV amplitudes in N = 5,6 supergravity vacua of type II superstrings
Bianchi M.
2011-01-01
Abstract
We compute one-loop threshold corrections to R-4 terms in N = 5, 6 supergravity vacua of Type II superstrings. We then discuss nonperturbative corrections generated by asymmetric D-brane instantons. Finally we derive generating functions for MHV amplitudes at tree level in N = 5, 6 supergravities.File in questo prodotto:
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