Gia Dvali on "Power of macro black holes, and micro black holes at LHC"

by All (CERN)

Monday 7 Apr 2008, 14:00 → 15:00 Europe/Zurich

1/1-025 (CERN)

The schedule for this Journal Club on String Theory will be as follows: 1) The latest news in the world of strings Please bring papers that caught your recent attention and briefly summarize motivations, methods and results. 2) "Power of macro black holes, and micro black holes at LHC", discussion led by Gia Dvali Abstract: I will discuss some recent progress in constraining the short distance particle physics from the large distance black hole dynamics, and its implications for fundamental theories, cosmology and phenomenology. There emerge the consistency bounds on the quantum gravity scale and the particle masses, in terms of the number of existing particle species and/or the largeness of the allowed exact symmetries of nature. When generalized to deSitter type vacua, these bounds severely restrict properties of the inflationary vacua on the string landscape. For phenomenology, these bounds imply that the class of theories that solve the hierarchy problem by lowering the quantum gravity scale is potentially much wider than what was previously though, and is not a priory limited by large extra dimensions scenarios. In particular, the above class includes theories with many particle species and/or large discrete symmetries, regardless of their extra dimensional origin. The model-independent predictions of these theories are strong gravity and production of mini black holes in particle collisions around the TeV energies. The effective field theory consistency arguments severely constrain properties of the mini black holes, and imply that they are qualitatively different from the large ones. In particular, the small black holes carry hair. Hope to see you all!! Gabriele Honecker Fernando Marchesano Nikolaos Prezas References: arXiv:0801.1287, 0712.3170, 0710.4344, 0706.2050 [hep-th]