Simulation of jet quenching at RHIC and LHC

The model to simulate jet quenching effect in ultrarelativistic heavy ion collisions is presented. The model is the fast Monte-Carlo tool implemented to modify a standard PYTHIA jet event. The model has been generalized to the case of the "full" heavy ion event (the superposition of soft, hydro-type state and hard multi-jets) using a simple and fast simulation procedure for soft particle production. The model is capable of reproducing main features of the jet quenching pattern at RHIC and is applyed to analyze novel jet quenching features at LHC.Comment: Talk given at 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions "Quark Matter 2006" (Shanghai, China, November 14-20, 2006); 4 pages including 2 figures as EPS-files; prepared using LaTeX package for Journal of Physics

Capabilities of the CMS detector for studies of hard probes in heavy ion collisions at the LHC

The capabilities of the CMS experiment to study properties of hot and dense QCD-matter created in heavy ion collisions at the CERN Large Hadron Collider with the perturbative processes (so-called "hard probes") are presented. Detailed studies from complete simulations of the CMS detectors in Pb+Pb collisions at $\sqrt{s}=5.5$ TeV per nucleon pair are presented in view of two hard probes: quarkonium and $\gamma$-jet production.Comment: Talk given at International Workshop "High-pT physics at LHC" (Tokaj, Hungary, March 16-19, 2008); 8 pages including 5 figures as 8 EPS-files; prepared using LaTeX package for publication in Proceedings of Science (PoS

A model of jet quenching in ultrarelativistic heavy ion collisions and high-pt hadron spectra at RHIC

The method to simulate the rescattering and energy loss of hard partons in ultrarelativistic heavy ion collisions has been developed. The model is a fast Monte-Carlo tool introduced to modify a standard PYTHIA jet event. The full heavy ion event is obtained as a superposition of a soft hydro-type state and hard multi-jets. The model is applied to analysis of the jet quenching pattern at RHIC.Comment: 16 pages including 4-eps figure

Fast simulation of flow effects in central and semi-central heavy ion collisions at LHC

The simple method for simulation of ``thermal'' hadron spectra in ultrarelativistic heavy ion collisions including longitudinal, transverse and elliptic flow is developed. The model is realized as fast Monte-Carlo event generator.Comment: 6 pages, LaTe

Nuclear geometry of jet quenching

The most suitable way to study the jet quenching as a function of distance traversed is varying the impact parameter b of ultrarelativistic nucleus-nucleus collision (initial energy density in nuclear overlapping zone is almost independent of b up to b R_A). It is shown that b-dependences of medium-induced radiative and collisional energy losses of a hard parton jet propagating through dense QCD-matter are very different. The experimental verification of this phenomenon could be performed for a jet with non-zero cone size basing on essential difference between angular distributions of collisional and radiative energy losses.Comment: LaTeX+7 figures, epsfig.st