3,390 research outputs found
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
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
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 TeV per nucleon pair are presented in view of two
hard probes: quarkonium and -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
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 -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.
Medium-modified fragmentation of b-jets tagged by a leading muon in ultrarelativistic heavy ion collisions
The possibility to observe the medium-modified fragmentation of hard b-quarks
tagged by a leading muon in ultrarelativistic heavy ion collisions is analyzed.
We have found that reasonable statistics, ~20000 events per 1 month of LHC run
with lead beams, can be expected for the realistic geometrical acceptance and
kinematic cuts. The numerical estimates on the effect of the medium-induced
softening b-jet fragmentation function are given.Comment: 12 pages in LaTeX (including 3 figures in EPS-format
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