scholarly journals Dimuon and Diphoton Emission from Quark-Gluon Plasma in High-Energy Heavy-Ion Collisions: Effects of Longitudinal Flow

1990 ◽  
Vol 83 (6) ◽  
pp. 1165-1176
Author(s):  
R. Yoshida
Keyword(s):  
Quark Gluon Plasma ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
High Energy ◽  
Longitudinal Flow ◽  
Ion Collisions

scholarly journals On Pseudorapidity Distribution and Speed of Sound in High Energy Heavy Ion Collisions Based on a New Revised Landau Hydrodynamic Model

2015 ◽  
Vol 2015 ◽  
pp. 1-23 ◽  
Author(s):  
Li-Na Gao ◽  
Fu-Hu Liu
Keyword(s):  
Speed Of Sound ◽  
Hydrodynamic Model ◽  
Quark Gluon Plasma ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
High Energy ◽  
Relativistic Heavy Ion Collider ◽  
Central Source ◽  
Ion Collisions

We propose a new revised Landau hydrodynamic model to study systematically the pseudorapidity distributions of charged particles produced in heavy ion collisions over an energy range from a few GeV to a few TeV per nucleon pair. The interacting system is divided into three sources, namely, the central, target, and projectile sources, respectively. The large central source is described by the Landau hydrodynamic model and further revised by the contributions of the small target/projectile sources. The modeling results are in agreement with the available experimental data at relativistic heavy ion collider, large hadron collider, and other energies for different centralities. The value of square speed of sound parameter in different collisions has been extracted by us from the widths of rapidity distributions. Our results show that, in heavy ion collisions at energies of the two colliders, the central source undergoes a phase transition from hadronic gas to quark-gluon plasma liquid phase; meanwhile, the target/projectile sources remain in the state of hadronic gas. The present work confirms that the quark-gluon plasma is of liquid type rather than being of a gas type.

scholarly journals PROBING THE STATES OF MATTER IN QCD

2013 ◽  
Vol 28 (27) ◽  
pp. 1330043 ◽  
Author(s):  
HELMUT SATZ
Keyword(s):  
Critical Temperature ◽  
Quark Gluon Plasma ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
High Energy ◽  
Ideal Resonance ◽  
Ion Collisions ◽  
Quantum Numbers ◽  
Quark Deconfinement

The ultimate aim of high energy heavy ion collisions is to study quark deconfinement and the quark–gluon plasma predicted by quantum chromodynamics. This requires the identification of observables calculable in QCD and measurable in heavy ion collisions. I concentrate on three such phenomena, related to specific features of strongly interacting matter. The observed pattern of hadrosynthesis corresponds to that of an ideal resonance gas in equilibrium at the pseudo-critical temperature determined in QCD. The critical behavior of QCD is encoded in the fluctuation patterns of conserved quantum numbers, which are presently being measured. The temperature of the quark–gluon plasma can be determined by the dissociation patterns of the different quarkonium states, now under study at the LHC for both charmonia and bottomonia.

DILEPTONS AND PHOTONS IN HIGH ENERGY HEAVY ION REACTIONS: A REVIEW

1991 ◽  
Vol 06 (04) ◽  
pp. 517-558 ◽  
Author(s):  
SIBAJI RAHA ◽  
BIKASH SINHA
Keyword(s):  
Quark Gluon Plasma ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
High Energy ◽  
Direct Photons ◽  
Ion Collisions ◽  
State Of Matter ◽  
Ultrarelativistic Heavy Ion Collisions ◽  
New State Of Matter

We review the production of dilepton pairs, direct photons and diphoton pairs in ultrarelativistic heavy ion collisions, with special attention to the applicability of these particles as the signal for a new state of matter—the quark-gluon plasma.

scholarly journals Jet quenching in high-energy heavy-ion collisions

2015 ◽  
Vol 24 (11) ◽  
pp. 1530014 ◽  
Author(s):  
Guang-You Qin ◽  
Xin-Nian Wang
Keyword(s):  
Energy Loss ◽  
Quark Gluon Plasma ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
High Energy ◽  
Jet Quenching ◽  
Parton Energy Loss ◽  
Ion Collisions ◽  
Phenomenological Studies

Jet quenching in high-energy heavy-ion collisions can be used to probe properties of hot and dense quark–gluon plasma. We provide a brief introduction to the concept and framework for the study of jet quenching. Different approaches and implementation of multiple scattering and parton energy loss are discussed. Recent progresses in the theoretical and phenomenological studies of jet quenching in heavy-ion collisions at RHIC and LHC are reviewed.

Multipion correlations as a signal for quark-gluon plasma formation in high energy heavy ion collisions

1998 ◽  
Vol 58 (4) ◽  
pp. 2311-2315 ◽  
Author(s):  
W. N. Zhang ◽  
L. Huo ◽  
X. J. Chen ◽  
W. Wang ◽  
Y. M. Liu
Keyword(s):  
Quark Gluon Plasma ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
High Energy ◽  
Plasma Formation ◽  
Ion Collisions

scholarly journals HAS THE QUARK-GLUON PLASMA BEEN SEEN?

2006 ◽  
Vol 21 (08n09) ◽  
pp. 1750-1763 ◽  
Author(s):  
JOHANNA STACHEL
Keyword(s):  
Quark Gluon Plasma ◽  
Preliminary Data ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
High Energy ◽  
Ion Collisions

Data from the first three years of running at RHIC are reviewed and put into context with data obtained previously at the AGS and SPS and with the physics question of creation of a quark-gluon plasma in high energy heavy ion collisions. Also some very recent and still preliminary data from run are included.

THE QUEST FOR THE QUARK–GLUON PLASMA

1996 ◽  
Vol 11 (28) ◽  
pp. 4943-4967 ◽  
Author(s):  
MAURICE JACOB
Keyword(s):  
Quark Gluon Plasma ◽  
Heavy Ion Collisions ◽  
Present Situation ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
High Energy ◽  
Ion Collisions ◽  
Very High Energy ◽  
Very High

Heavy-ion collisions at very high energy offer conditions such that a quark–gluon plasma could be formed. Specific signals are used to probe what is actually happening. A first round of tests, with small- to medium-sized ions, has been completed. New rounds of tests using the heaviest ions and, later on, much higher energies, are proceeding. The present situation is assessed.

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