The Ramond–Ramond sector of string theory beyond leading order

Kasper Peeters, Anders Westerberg
2004 Classical and quantum gravity  
Present knowledge of higher-derivative terms in string effective actions is, with a few exceptions, restricted to the NS-NS sector, a situation which prevents the development of a variety of interesting applications for which the RR terms are relevant. We here provide the formalism as well as efficient techniques to determine the latter directly from string-amplitude calculations. As an illustration of these methods, we compute the dependence of the type-IIB action on the three- and five-form
more » ... ee- and five-form RR field strengths at four-point, genus-one, order-(alpha')^3 level. We explicitly verify that our results are in accord with the SL(2,Z) S-duality invariance of type-IIB string theory. Extensions of our method to other bosonic terms in the type-II effective actions are discussed as well.
doi:10.1088/0264-9381/21/6/022 fatcat:x7fddyqxhraufhp5lcdosoak4y