Towards an S-matrix Description of Gravitational Collapse

Simple item page
dc.creatorAmati, D.
dc.creatorCiafaloni, M.
dc.creatorVeneziano, G.
dc.date2007-12-07
dc.date2007-12-20
dc.date.accessioned2026-07-07T11:39:15Z
dc.date.available2026-07-07T11:39:15Z
dc.descriptionExtending our previous results on trans-Planckian ($Gs \gg \hbar$) scattering of light particles in quantum string-gravity we present a calculation of the corresponding S-matrix from the region of large impact parameters ($b \gg G\sqrt{s}>λ_s$) down to the regime where classical gravitational collapse is expected to occur. By solving the semiclassical equations of a previously introduced effective-action approximation, we find that the perturbative expansion around the leading eikonal result diverges at a critical value $b = b_c = O(G\sqrt{s})$, signalling the onset of a new (black-hole related?) regime. We then discuss the main features of our explicitly unitary S-matrix -- and of the associated effective metric -- down to (and in the vicinity of) $b = b_c$, and present some ideas and results on its extension all the way to the $ b \to 0$ region. We find that for $b<b_c$ the physical field solutions are complex-valued and the S-matrix shows additional absorption, related to a new production mechanism. The field solutions themselves are, surprisingly, everywhere regular, suggesting a quantum-tunneling -- rather than a singular-geometry -- situation.
dc.description39 pages, 5 figures; added discussion sect. 7, added references, acknowledgements
dc.identifierhttps://arxiv.org/abs/0712.1209
dc.identifierhttp://arxiv.org/abs/0712.1209
dc.identifierJHEP0802:049,2008
dc.identifierdoi:10.1088/1126-6708/2008/02/049
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/199847
dc.subjectHigh Energy Physics - Theory
dc.titleTowards an S-matrix Description of Gravitational Collapse
dc.typetext

Files

Collections

arXiv