Göttingen 2012 – wissenschaftliches Programm
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GR: Fachverband Gravitation und Relativitätstheorie
GR 5: Schwarze Löcher – Lösungen I
GR 5.2: Vortrag
Dienstag, 28. Februar 2012, 08:50–09:10, ZHG 002
Phenomenology of quantum gravity black holes — •Piero Nicolini1, Jonas Mureika2, Euro Spallucci3, and Elizabeth Winstanley4 — 1Johann Wolfgang Goethe Universität, Frankfurt am Main, Germany — 2Loyola Marymount University, Los Angeles, CA, USA — 3Università di Trieste and INFN, Sezione di Trieste, Trieste, Italy — 4The University of Sheffield, Sheffield, United Kingdom
In this contribution we present a new scenario for the production and the evaporation of microscopic black holes in the presence of a quantum gravity induced fundamental length. After a brief analysis of the existing families of quantum gravity improved black hole geometries, we focus on their common thermodynamic behavior, namely the presence of a phase transition to a positive heat capacity cooling down in the final stages of the evaporation even in the non-rotating, neutral case. This fact has important repercussions of the evaporation spectra in terms of new profiles of grey body factors. Quantum gravity black holes would emit soft particles mainly on the brane, a distinctive signatures in marked contrast to results obtained with classical metrics. Then we present a first step in modeling black hole production in a post-semiclassical limit, by employing an effective ultraviolet cut off. We show that the new cross sections approach the usual ``black disk'' form at high energy, while they differ significantly near the fundamental scale. If this behavior is confirmed by all the class of quantum gravity black holes, such novel phenomenology is beyond the reach of current accelerators experiments, but is still potentially observable in ultra-high energy cosmic ray collisions.