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

Probing the medium-induced energy loss of bottom quarks by dimuon production in heavy ion collisions at LHC

The potential of coming experiments on Large Hadron Collider (LHC) to observe the rescattering and energy loss of heavy quarks in the dense matter created in heavy ion collisions is discussed. We analyze the sensitivity of high-mass mu+mu- pairs from BBbar semileptonic decays and secondary J/Psi from single B decays to the medium-induced bottom quark energy loss.Comment: LaTeX+3 figures, epsfig.st

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