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The subleading eikonal in supergravity theories
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). University of Copenhagen, Denmark.
Number of Authors: 42018 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 10, article id 038Article in journal (Refereed) Published
Abstract [en]

In this paper we study the subleading contributions to eikonal scattering in (super)gravity theories with particular emphasis on the role of both elastic and inelastic scattering processes. For concreteness we focus on the scattering of various massless particles off a stack of Dp-branes in type II supergravity in the limit of large impact parameter b. We analyse the relevant field theory Feynman diagrams which naturally give rise to both elastic and inelastic processes. We show that in the case analysed the leading and subleading eikonal only depend on elastic processes, while inelastic processes are captured by a pre-factor multiplying the exponentiated leading and subleading eikonal phase. In addition to the traditional Feynman diagram computations mentioned above, we also present a novel method for computing the amplitudes contributing to the leading and subleading eikonal phases, which, in the large b limit, only involves knowledge of the onshell three and four-point vertices. The two methods are shown to give the same results. Furthermore we derive these results in yet another way, by computing various one-point amplitudes which allow us to extract the classical solution of the gravitational back reaction of the target Dp-branes. Finally we show how our expressions for the leading and subleading eikonal agree with the calculation of the metric and corresponding deflection angle for massless states moving along geodesics in the relevant curved geometry.

Place, publisher, year, edition, pages
2018. no 10, article id 038
Keywords [en]
Scattering Amplitudes, D-branes, Classical Theories of Gravity
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-163728DOI: 10.1007/JHEP10(2018)038ISI: 000452186200002OAI: oai:DiVA.org:su-163728DiVA, id: diva2:1277177
Available from: 2019-01-09 Created: 2019-01-09 Last updated: 2019-01-09Bibliographically approved

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