– Niels Bohr Institutet - Københavns Universitet

Regge behavior saves string theory from causality violations

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Paolo di Vecchia, D'Appollonio Giuseppe, Rodolfo Russo, Gabriele Veneziano

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 s (the string-length parameter) with l s ≫ R p (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.
TidsskriftJournal of High Energy Physics (Online)
Antal sider20
StatusUdgivet - 27 maj 2015

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