Regge behavior saves string theory from causality violations

TY - JOUR

T1 - Regge behavior saves string theory from causality violations

AU - di Vecchia, Paolo

AU - Giuseppe, D'Appollonio

AU - Russo, Rodolfo

AU - Veneziano, Gabriele

PY - 2015/5/1

Y1 - 2015/5/1

N2 - 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 ≤ ls (the string-length parameter) with ls ≫ Rp (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.

AB - 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 ≤ ls (the string-length parameter) with ls ≫ Rp (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.

U2 - 10.1007/jhep05(2015)144

DO - 10.1007/jhep05(2015)144

M3 - Journal article

SN - 1126-6708

VL - 2015

JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

IS - 05

M1 - 144

ER -