English

S-matrix and Quantum Tunneling in Gravitational Collapse

High Energy Physics - Theory 2009-02-09 v1

Abstract

Using the recently introduced ACV reduced-action approach to transplanckian scattering of light particles, we show that the SS-matrix in the region of classical gravitational collapse is related to a tunneling amplitude in an effective field space. We understand in this way the role of both real and complex field solutions, the choice of the physical ones, the absorption of the elastic channel associated to inelastic multigraviton production and the occurrence of extra absorption below the critical impact parameter. We are also able to compute a class of quantum corrections to the original semiclassical SS-matrix that we argue to be qualitatively sensible and which, generally speaking, tend to smooth out the semiclassical results.

Keywords

Cite

@article{arxiv.0807.2117,
  title  = {S-matrix and Quantum Tunneling in Gravitational Collapse},
  author = {M. Ciafaloni and D. Colferai},
  journal= {arXiv preprint arXiv:0807.2117},
  year   = {2009}
}

Comments

19 pages, 4 figures, latex

R2 v1 2026-06-21T11:00:10.644Z