On R⁴ terms and MHV amplitudes in N = 5,6 supergravity vacua of Type II superstrings
classification
✦ hep-th
keywords
amplitudescorrectionssupergravitysuperstringstermstypevacuaasymmetric
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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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