Jet Physics in Heavy Ion Collisions with Compact Muon Solenoid detector at the LHC

The status of CMS jet simulations and physics analysis in heavy ion collisions is presented. Jet reconstruction and high transverse momentum particle tracking in the high multiplicity environment of heavy ion collisions at the LHC using the CMS calorimetry and tracking system are described. The Monte Carlo tools used to simulate jet quenching are discussed.Comment: Talk given at 5th International Conference on Physics and Astrophysics of Quark Gluon Plasma, Salt Lake City, Kolkata, India, February 8-12, 2005; 4 pages including 4 figures as EPS-files; prepared using LaTeX package for Journal of Physics

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

Jet quenching in heavy ion collisions at LHC

We discuss the potential information about highly excited QCD-matter provided by medium-induced partonic energy loss, known as ``jet quenching''. In particular, with its large acceptance hadronic and electromagnetic calorimetry, the Compact Muon Solenoid detector at LHC collider is a promising device to study these effects. We present physics simulations of observables such as the jet distribution with impact parameter, the azimuthal anisotropy of jet quenching, and the effects of b-quark energy loss on the high-mass dimuon continuum and secondary charmonium production.Comment: Talk given at XXXII International Symposium on Multiparticle Dynamics, Alushta, Crimea, September 7-13, 2002; 4 pages including 3 eps-figure

Rapidity-dependence of jet shape broadening and quenching

The jet shape modification due to partonic energy loss in the dense QCD matter is investigated by the help of the special transverse energy-energy correlator in the vicinity of maximum energy deposition of every event. In the accepted scenario with scattering of jet hard partons off comoving medium constituents this correlator is independent of the pseudorapidity position of a jet axis and becomes considerably broader (symmetrically over the pseudorapidity and the azimuthal angle) in comparison with $pp$-collisions. At scattering off "slow" medium constituents the broadening of correlation functions is dependent on the pseudorapidity position of a jet axis and increases noticeably in comparison with the previous scenario for jets with large enough pseudorapidities. These two considered scenarios result also in the different dependence of jet quenching on the pseudorapidity.Comment: 9 pages, 7 figures, 1 table, RevTex4, typos corrected, accepted for publication in Phys. Rev.