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Regge behavior saves string theory from causality violations
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. University of Copenhagen, Denmark.
2015 (English)In: Journal of High Energy Physics (JHEP), ISSN 1029-8479, E-ISSN 1126-6708, Vol. 2015, no 5, 144Article in journal (Refereed) Published
Abstract [en]

Abstract: Higher-derivative corrections to the Einstein-Hilbert action are present in bosonic string theory leading to the potential causality violations recently pointed out by Camanho et al. [1]. We analyze in detail this question by considering high-energy string-brane collisions at impact parameters b ≤ l<inf>s</inf> (the string-length parameter) with l<inf>s</inf> ≫ R<inf>p</inf> (the characteristic scale of the Dp-brane geometry). If we keep only the contribution of the massless states causality is violated for a set of initial states whose polarization is suitably chosen with respect to the impact parameter vector. Such violations are instead neatly avoided when the full structure of string theory — and in particular its Regge behavior — is taken into account.

Place, publisher, year, edition, pages
2015. Vol. 2015, no 5, 144
Keyword [en]
Bosonic Strings, D-branes, Models of Quantum Gravity
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-170274DOI: 10.1007/JHEP05(2015)144ISI: 000355345100002ScopusID: 2-s2.0-84930225539OAI: diva2:833649

QC 20150630

Available from: 2015-06-30 Created: 2015-06-29 Last updated: 2015-08-17Bibliographically approved

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Di Vecchia, Paolo
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