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.~cite{Camanho:2014apa}. We analyze in detail this question by considering high-energy string-brane collisions at impact parameters $b le l_s$ (the string-length parameter) with $l_s gg R_p$ (the characteristic scale of the D$p$-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-- i...
AbstractUsing standard techniques in string/D-brane scattering amplitude computations, we evaluate t...
We study string loop corrections to the gravity kinetic terms in type IIB com- pactifications on Cal...
Black holes are interesting astrophysical objects that have been studied as systems sensitive to qua...
Higher-derivative corrections to the Einstein-Hilbert action are present in bosonic string theory le...
Higher-derivative corrections to the Einstein-Hilbert action are present in bosonic string theory le...
Higher-derivative corrections to the Einstein-Hilbert action are present in bosonic string theory ...
Higher-derivative corrections to the Einstein-Hilbert action are present in bosonic string theory le...
We consider higher derivative corrections to the graviton three-point coupling within a weakly coup...
We study the spectrum of semiclassical rotating strings in de Sitter space and its consistency. Even...
We consider the high-energy behaviour of processes involving Kaluza-Klein (KK) gravitons of weak-sca...
G.D. thanks the Galileo Galilei Institute for Theoretical Physics for hospitality and the INFN for p...
We argue that certain apparently consistent low-energy erective field theories described by local, L...
A toy calculation of string/D-particle interactions within a world-sheet approach indicates that qua...
We consider some consequences of describing the gauge and matter degrees of freedom in our universe...
We present a generalization of the string's Polyakov action that describes a conformally invariant f...
AbstractUsing standard techniques in string/D-brane scattering amplitude computations, we evaluate t...
We study string loop corrections to the gravity kinetic terms in type IIB com- pactifications on Cal...
Black holes are interesting astrophysical objects that have been studied as systems sensitive to qua...
Higher-derivative corrections to the Einstein-Hilbert action are present in bosonic string theory le...
Higher-derivative corrections to the Einstein-Hilbert action are present in bosonic string theory le...
Higher-derivative corrections to the Einstein-Hilbert action are present in bosonic string theory ...
Higher-derivative corrections to the Einstein-Hilbert action are present in bosonic string theory le...
We consider higher derivative corrections to the graviton three-point coupling within a weakly coup...
We study the spectrum of semiclassical rotating strings in de Sitter space and its consistency. Even...
We consider the high-energy behaviour of processes involving Kaluza-Klein (KK) gravitons of weak-sca...
G.D. thanks the Galileo Galilei Institute for Theoretical Physics for hospitality and the INFN for p...
We argue that certain apparently consistent low-energy erective field theories described by local, L...
A toy calculation of string/D-particle interactions within a world-sheet approach indicates that qua...
We consider some consequences of describing the gauge and matter degrees of freedom in our universe...
We present a generalization of the string's Polyakov action that describes a conformally invariant f...
AbstractUsing standard techniques in string/D-brane scattering amplitude computations, we evaluate t...
We study string loop corrections to the gravity kinetic terms in type IIB com- pactifications on Cal...
Black holes are interesting astrophysical objects that have been studied as systems sensitive to qua...