Sphere-level Ramond-Ramond couplings in Ramond-Neveu-Schwarz formalism
High Energy Physics - Theory
2015-06-18 v3
Abstract
We calculate in details the sphere-level scattering amplitude of two Ramond-Ramond (RR) and two Neveu-Schwarz-Neveu-Schwarz (NSNS) vertex operators in type II superstring theories in Ramond-Neveu-Schwarz (RNS) formalism. We then compare the expansion of this amplitude at order with the eight-derivative couplings of the gravity and B-field that have been recently found based on S-dual and T-dual Ward identities. We find exact agreement. Moreover, using the above S-matrix element, we have found various couplings involving the dilaton field, and shown that they are also fully consistent with these Ward identities.
Keywords
Cite
@article{arxiv.1312.4703,
title = {Sphere-level Ramond-Ramond couplings in Ramond-Neveu-Schwarz formalism},
author = {Hamid R. Bakhtiarizadeh and Mohammad R. Garousi},
journal= {arXiv preprint arXiv:1312.4703},
year = {2015}
}
Comments
34 pages, Latex file, no figure; v3: the version appears in npb