Constraints on Tree-Level Higher Order Gravitational Couplings in Superstring Theory

We consider the scattering amplitudes of five and six gravitons at tree level in superstring theory. Their power series expansions in the Regge slope α' are analyzed through the order α'(8) showing some interesting constraints on higher order gravitational couplings in the effective supers...

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Bibliographic Details
Published in:Physical review letters Vol. 106; no. 11; p. 111601
Main Author: Stieberger, Stephan
Format: Journal Article
Language:English
Published: United States 18.03.2011
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ISSN:0031-9007, 1079-7114, 1079-7114
Online Access:Get full text
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