Abstract
 

Di-Jet suppression plus monojet emission - one signal for Quark-Gluon Plasma and LXD-Black Holes at the LHC
(oral presentation)
Horst Stoecker
Johann Wolfgang Goethe-University

 

The production of Large Extra Dimension (LXD) Black Holes (BHs), with a new, fundamental mass scale of Mf = 1 TeV, has been predicted to occur at the Large Hadron Collider, LHC, with the formidable rate of 10^8 per year in p-p collisions at full energy, 14 TeV, and at full luminosity. We show that such LXD-BH formation will be experimentally observable at the LHC by the complete disappearance of all very high pt (> 500 GeV) back-to-back correlated Di-Jets of total mass M > Mf = 1 TeV, in the large detectors ALICE, ATLAS and CMS. We suggest to complement this clear cut-off signal at M > 2*500 GeV in the di-jet-correlation function by detecting the subsequent, hard Hawking-decayproducts of the LXD-BHs, namely multiple high energy (> 100 GeV) SM Mono-Jets (i.e. away-side jet missing), sprayed off the evaporating BHs into all directions. With Heavy Ion beams at the LHC, strong Di-Jet suppression is also expected, but here due to Quark-Gluon-Plasma- induced jet attenuation, at medium to low jet energies, pt < 200 GeV. The (Mono-)Jets in these events can be used to trigger for tsunami-emission of secondary compressed QCD-matter at well defined Mach-angles, both at the trigger side and at the awayside jet, thus allowing for a direct measurement of the equation of state EoS and the speed of sound Cs of the primordial "big bang" matter at the LHC. We discuss the importance of the underlying strong collective motion - the gluon storm - of the QCD- matter for the formation and evolution of these Mach cones. We predict a significant deformation of Mach shocks from the gluon storm in central Au+Au collisions at RHIC and LHC energies as compared to the case of jet propagation in a static medium. Complete stopping of 50 GeV jets at the LHC in 2-3 fm yields nonlinear high density tsunami-like shocks in the quark gluon plasma, which will be clearly visible in the disintegration pattern of the matter in crescents of revolution, with complex emission patterns. We report on strong effects of a first order phase transition in the EoS for the dynamics and geometrical evolution of the QCD- matter and the tsunami shock emission, as studied in a full 3-dimensional fluid dynamical model.

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