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Higher-derivative couplings in string theory: Five-point contact terms
2021
Nuclear Physics B
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We compute the tree-level H 2 R 3 couplings of type II strings and provide some basic tests of the couplings by considering both K3 and Calabi-Yau threefold compactifications. Curiously, additional kinematical structures show up at tree level that are not present in the one-loop couplings. This has interesting implications for type II supersymmetry as well as SL(2, Z) duality in type IIB strings.
doi:10.1016/j.nuclphysb.2021.115386
fatcat:w3sgszqmz5f3tkmcadi4hh45z4