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- W3103671008 abstract "As shown recently (W. Kummer, H. Liebl, D.V. Vassilevich, Nucl. Phys. B 544 (1999) 403) 2d quantum gravity theories — including spherically reduced Einstein-gravity — after an exact path integral of its geometric part can be treated perturbatively in the loops of (scalar) matter. Obviously the classical mechanism of black hole formation should be contained in the tree approximation of the theory. This is shown to be the case for the scattering of two scalars through an intermediate state which by its effective black hole mass is identified as a “virtual black hole”. The present discussion is restricted to minimally coupled scalars without and with mass. In the first case the probability amplitude diverges, except the black hole is “plugged” by a suitable boundary condition. For massive scalars a finite S-matrix element is obtained." @default.
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- W3103671008 date "2000-07-01" @default.
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- W3103671008 title "The virtual black hole in 2d quantum gravity" @default.
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- W3103671008 doi "https://doi.org/10.1016/s0550-3213(00)00231-5" @default.
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