scholarly journals What the collective flow excitation function can tell about the quark–gluon plasma

2014 ◽  
Vol 931 ◽  
pp. 975-980
Author(s):  
Jussi Auvinen ◽  
Jan Steinheimer ◽  
Hannah Petersen
Keyword(s):  
Excitation Function ◽  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Collective Flow

scholarly journals Flow and correlation phenomena measurements in pp, pPb and PbPb collisions at CMS

2018 ◽  
Vol 172 ◽  
pp. 05005
Author(s):  
Sandra S. Padula
Keyword(s):  
Transverse Momentum ◽  
Collective Behavior ◽  
Quark Gluon Plasma ◽  
Frictional Resistance ◽  
Gluon Plasma ◽  
High Energy ◽  
Collective Flow ◽  
Particle Correlation ◽  
The Past ◽  
High Energy Collisions

The quark-gluon plasma created in high energy collisions of large nuclei exhibits strong anisotropic collective behavior as a nearly perfect fluid, flowing with little frictional resistance or viscosity. It has been investigated extensively over the past years employing two or more particle correlations. An overview of collective flow and particle correlation measurements at CMS as a function of transverse momentum, pseudorapidity, event multiplicity, for both charged hadrons or identified particles will be presented. These results are compared among pp, pPb and PbPb systems and several aspects of their intriguing similarities are discussed.

scholarly journals Heavy-quark dynamics in a hydrodynamically evolving medium

2018 ◽  
Vol 171 ◽  
pp. 04003
Author(s):  
Marlene Nahrgang ◽  
Jörg Aichelin ◽  
Pol Bernard Gossiaux ◽  
Klaus Werner
Keyword(s):  
Heavy Quark ◽  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Heavy Quarks ◽  
Collective Flow ◽  
Recent Advances

In this talk we will discuss the recent advances in describing heavy-quark dynamics in the quark-gluon plasma (QGP), which evolves hydrodynamically. Special emphasis is put on the collective flow of the heavy-quarks with the medium constituents, for which we present our latest results obtained within the MC@sHQ+EPOS2 model at √s = 5 TeV.

scholarly journals Directed flow from global symmetry and initial state Fluctuations

Open Physics ◽  
2012 ◽  
Vol 10 (6) ◽  
Author(s):  
Laszlo Csernai ◽  
Astrid Skålvik ◽  
D. Wang ◽  
Daniel Strottman ◽  
Csaba Anderlik ◽  
...  
Keyword(s):  
Quark Gluon Plasma ◽  
Initial Conditions ◽  
Gluon Plasma ◽  
Collective Flow ◽  
Global Symmetry ◽  
Initial State ◽  
Initial Development ◽  
Numerical Viscosity ◽  
Peripheral Collisions ◽  
Fluid Dynamical Model

AbstractCollective flow is studied in a 3+1D fluid dynamical model with globally symmetric, peripheral initial conditions, taking into account the shear flow. At $\sqrt {s_{NN} } $ = 2.76 TeV in semi-peripheral Pb+Pb collisions this leads to rotation, while at more peripheral collisions with high resolution and low numerical viscosity, the initial development of a Kelvin-Helmholz instability is observed. This effect provides a precision tool for studying the viscosity of Quark-Gluon Plasma.

Collective Flow Signals the Quark–Gluon Plasma

2005 ◽  
Vol 24 (1-4) ◽  
pp. 189-201
Author(s):  
E.L. Bratkovskaya ◽  
M. Bleicher ◽  
A. Muronga ◽  
K. Paech ◽  
al et
Keyword(s):  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Collective Flow

scholarly journals SLAVNOV–TAYLOR IDENTITY FOR NONEQUILIBRIUM QUARK–GLUON PLASMA

2001 ◽  
Vol 16 (08) ◽  
pp. 531-540 ◽  
Author(s):  
K. OKANO
Keyword(s):  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Polarization Tensor ◽  
Gluon Polarization ◽  
Time Path

Within the closed-time-path formalism of nonequilibrium QCD, we derive a Slavnov–Taylor (ST) identity for the gluon polarization tensor. The ST identity takes the same form in both Coulomb and covariant gauges. Application to quasi-uniform quark–gluon plasma (QGP) near equilibrium or nonequilibrium quasistationary QGP is made.

scholarly journals Quark Cluster Expansion Model for Interpreting Finite-T Lattice QCD Thermodynamics

Symmetry ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 514
Author(s):  
David Blaschke ◽  
Kirill A. Devyatyarov ◽  
Olaf Kaczmarek
Keyword(s):  
Lattice Qcd ◽  
Cluster Expansion ◽  
Quark Gluon Plasma ◽  
Degrees Of Freedom ◽  
Gluon Plasma ◽  
Polyakov Loop ◽  
Unified Approach ◽  
Narrow Temperature Interval ◽  
Levinson Theorem ◽  
Expansion Model

In this work, we present a unified approach to the thermodynamics of hadron–quark–gluon matter at finite temperatures on the basis of a quark cluster expansion in the form of a generalized Beth–Uhlenbeck approach with a generic ansatz for the hadronic phase shifts that fulfills the Levinson theorem. The change in the composition of the system from a hadron resonance gas to a quark–gluon plasma takes place in the narrow temperature interval of 150–190 MeV, where the Mott dissociation of hadrons is triggered by the dropping quark mass as a result of the restoration of chiral symmetry. The deconfinement of quark and gluon degrees of freedom is regulated by the Polyakov loop variable that signals the breaking of the Z(3) center symmetry of the color SU(3) group of QCD. We suggest a Polyakov-loop quark–gluon plasma model with O(αs) virial correction and solve the stationarity condition of the thermodynamic potential (gap equation) for the Polyakov loop. The resulting pressure is in excellent agreement with lattice QCD simulations up to high temperatures.

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