175 research outputs found
Jet Quenching in Heavy-Ion Collisions - The Transition Era from RHIC to LHC
A status report on the jet quenching physics in heavy-ion collisions is given
as it appears after more than 10 years of collecting and analysing data at the
Relativistic Heavy Ion Collider (RHIC) and ~1.5 years of physics at the Large
Hadron Collider (LHC). The (theoretical) predictions and expectations before
the start of the LHC program are contrasted with the most recent experimental
results, focussing on the nuclear modification factor R_{AA}, the elliptic flow
v_2 of high-p_T particles, and on the problem of initial conditions.Comment: 12 pages, 7 figures, review article in the "Topical Issue on
Relativistic Hydro- and Thermodynamics" EPJ
Deflected Jets or Hot Spots? Conical Correlations of Hard Trigger Particles
The double-peak structure observed in soft-hard dihadron correlations was
recently studied intensively in order to learn more about the jet-induced
medium excitation in ultrarelativistic heavy-ion collisions. Experimental data
shows that the double-peak structure obtained for soft trigger particles
coalesces into one peak for harder trigger particles. We demonstrate that this
effect occurs when averaging over many jet events in a transversally expanding
background, while a hot spot scenario always leads to two distinct peaks. This
suggests to study soft-hard correlations induced by heavy-flavor jets with
those generated by light-flavor jets at RHIC and LHC in order to really
disentangle medium effects from jets.Comment: 6 pages, 3 figures, to appear in the proceedings of the Workshop on
'Hot & Cold Baryonic Matter 2010' (HCBM 2010), Budapest (Hungary
Hydrodynamic Flow and Jet Induced Mach Shocks at RHIC and LHC
We discuss the present collective flow signals for the phase transition to
quark-gluon plasma (QGP) and the collective flow as a barometer for the
equation of state (EoS). A study of Mach shocks induced by fast partonic jets
propagating through the QGP is given. We predict a significant deformation of
Mach shocks in central Au+Au collisions at RHIC and LHC energies as compared to
the case of jet propagation in a static medium. Results of a hydrodynamical
study of jet energy loss are presented.Comment: 15 pages, 8 figure
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