di Vecchia, Paolo^{5}; Giuseppe, D'Appollonio^{6}; Russo, Rodolfo^{3}; Veneziano, Gabriele^{7}

Affiliations:

^{1} Theoretical Particle Physics and Cosmology, The Niels Bohr Institute, Faculty of Science, Københavns Universitet^{2} INFN^{3} Queen Mary College, London University^{4} CERN^{5} Theoretical Particle Physics and Cosmology, The Niels Bohr Institute, Faculty of Science, Københavns Universitet^{6} INFN^{7} CERN

DOI:

10.1007/JHEP05(2015)144

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 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.

Type:

Journal article

Language:

English

Published in:

Journal of High Energy Physics (online), 2015, Vol 2015, Issue 05