“…Yet very little is known at the dynamical level [19,20]. BH production and evaporation in high energy scattering [21,22,23,24,25,26] has been addressed by several groups [27,28,29,30,31,32,33], but a complete unitary S-matrix description is still missing that is expected to include gravitational bremsstrahlung. In particular it would be extremely interesting to derive string corrections to the GW signals predicted by General Relativity [34,35,36,37,38,39,40,41].…”