MG12 - Talk detail |
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Participant |
Colferai, Dimitri | |
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Institution |
University of Firenze and INFN - Via Sansone 1 - Sesto Fiorentino - - Italy | |
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Session |
Talk |
Abstract |
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BHT5 |
S-matrix and quantum tunneling in gravitational collapse |
Using the recently introduced ACV reduced-action approach to transplanckian scattering of light particles, we show that the S-matrix in the region of classical gravitational collapse is related to a quantum-tunneling amplitude in an effective field space. We understand in this way the role of both real and complex field solutions, the absorption of the elastic channel associated to inelastic multigraviton production and the occurrence of extra absorption below the critical impact parameter. Some unitarity properties of the quantum-mechanical effective model are presented and discussed. |