Elsevier

Nuclear Physics B

Volume 967, June 2021, 115386
Nuclear Physics B

Higher-derivative couplings in string theory: Five-point contact terms

https://doi.org/10.1016/j.nuclphysb.2021.115386Get rights and content
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Abstract

We compute the tree-level H2R3 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.

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