Experimental studies of the quantum chromodynamics phase diagram at the STAR experiment

Pramana ◽  
2015 ◽  
Vol 84 (5) ◽  
pp. 773-786 ◽  
Author(s):  
LOKESH KUMAR ◽  
DECLAN KEANE
Keyword(s):  
Phase Diagram ◽  
Quantum Chromodynamics ◽  
Experimental Studies ◽  
Star Experiment

Experimental Studies and Thermodynamic Modeling of the Interaction of O2 with SiC

2002 ◽  
Vol 742 ◽  
Author(s):  
Y. Song ◽  
F. W. Smith
Keyword(s):  
Phase Diagram ◽  
Thermal Decomposition ◽  
High Temperatures ◽  
Thermodynamic Modeling ◽  
Surface Segregation ◽  
Experimental Studies ◽  
Temperature Phase ◽  
Temperature Phase Diagram

ABSTRACTWe report on experimental studies and thermodynamic modeling of the reaction of O2 with the 4H- and 6H-SiC surfaces at high temperatures. This reaction leads to the growth of passivating SiO2 layers at high O2 pressures, etching of the surfaces at lower pressures, and enhancements of the surface segregation of carbon at still lower pressures. A pressure-temperature phase diagram for the oxidation of SiC is presented. Evidence for the thermal decomposition of the SiO2 layer on SiC is also presented.

scholarly journals Fluctuations in cool quark matter and the phase diagram of quantum chromodynamics

2019 ◽  
Vol 99 (7) ◽  
Author(s):  
Robert D. Pisarski ◽  
Vladimir V. Skokov ◽  
Alexei M. Tsvelik
Keyword(s):  
Phase Diagram ◽  
Quantum Chromodynamics ◽  
Quark Matter

Thermal Properties of CuGa2 Phase in Inert Atmosphere

2012 ◽  
Vol 326-328 ◽  
pp. 227-232 ◽  
Author(s):  
T.V. Kulikova ◽  
V.A. Bykov ◽  
K. Y. Shunyaev ◽  
A.B. Shubin
Keyword(s):  
Thermal Analysis ◽  
Phase Diagram ◽  
Thermal Decomposition ◽  
Heat Capacity ◽  
Thermal Expansion ◽  
Experimental Studies ◽  
Inert Atmosphere ◽  
Heat Conductivity Coefficient ◽  
Incongruent Melting ◽  
Modeling Methods

Thermal decomposition of copper digallide was studied using experimental (thermal analysis) and theoretical (thermodynamic modeling) methods. The temperatures of CuGa2incongruent melting are in satisfactory agreement between experimental and calculated values. Small differences with the phase diagram can be explained by minor non-stoichiometry of the alloy samples. The experimental studies of thermal diffusivity and thermal expansion of CuGa2were performed in the temperature range 298-500 K. The heat conductivity coefficient was further calculated using literary data concerning the density and heat capacity of the copper digallide.

Di-lepton production in heavy-ion collisions and the QCD phase diagram

Open Physics ◽  
2012 ◽  
Vol 10 (6) ◽  
Author(s):  
Yifei Zhang ◽  
Haojie Xu ◽  
Wangmei Zha ◽  
Qun Wang
Keyword(s):  
Phase Diagram ◽  
Mass Spectra ◽  
Heavy Ion ◽  
Mass Region ◽  
Lepton Production ◽  
Qcd Phase Diagram ◽  
Ion Collisions ◽  
200 Gev ◽  
Star Experiment ◽  
Low Mass

AbstractWe reproduce di-electron spectra in the region of 0 < m e+e < 4 GeV in both minimum bias and central Au+Au collisions at $\sqrt {s_{NN} } $ = 200 GeV measured by the STAR experiment. A cocktail simulation, incorporating STAR acceptance and detector responses, is able to describe the “enhancement” of the low mass region by including an in-medium modification of vector mesons and a thermal di-lepton calculation. We also predict the di-lepton mass spectra in RHIC lower energies via an extrapolation method. The evolution of Di-lepton mass spectra, effective temperature, and possible medium modifications versus colliding energies are studied to explore the QCD phase diagram.

Spiral Instabilities in a Reaction Diffusion System

2003 ◽  
Vol 17 (22n24) ◽  
pp. 4072-4085
Author(s):  
Lu-Qun Zhou ◽  
Chun-Xian Zhang ◽  
Qi Ouyang
Keyword(s):  
Phase Diagram ◽  
Experimental Studies ◽  
Reaction Diffusion ◽  
Theoretical Explanation ◽  
Spatiotemporal Chaos ◽  
Diffusion System ◽  
Bz Reaction ◽  
Long Wavelength ◽  
Spiral Dynamics ◽  
Chemical Turbulence

A series of experimental studies on spiral dynamics and instabilities in a spatial open reactor with the Belousov-zhabotinsky (BZ) reaction are reported. We present a phase diagram showing different spiral dynamic regimes. Two types of spiral instabilities, the Doppler instability and the long wavelength instability, are observed in the experiments. All these instabilities lead to a state of spatiotemporal chaos or chemical turbulence. Theoretical explanation are given for each instability.

scholarly journals Effects of droplet size and surfactants on anchoring in liquid crystal nanodroplets

Soft Matter ◽  
2019 ◽  
Vol 15 (19) ◽  
pp. 3914-3922 ◽  
Author(s):  
Zeynep Sumer ◽  
Alberto Striolo
Keyword(s):  
Phase Diagram ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Droplet Size ◽  
Experimental Studies ◽  
Coarse Grained ◽  
Coarse Grained Simulations

In an attempt to bridge the gap between computational and experimental studies, coarse-grained simulations are used to study nematic Liquid Crystal (LC) nanodroplets dispersed in water. A LC phase diagram is generated as a function of droplet size and temperature, and the effect of adding surfactants is quantified.

scholarly journals Aspects on Effective Theories and the QCD Transition

Symmetry ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 945
Author(s):  
Angel Gómez Nicola
Keyword(s):  
Phase Diagram ◽  
Perturbation Theory ◽  
Quantum Chromodynamics ◽  
Chiral Symmetry ◽  
Current Knowledge ◽  
Chiral Symmetry Restoration ◽  
Chiral Perturbation ◽  
Ward Identities ◽  
Hadron Gas ◽  
Effective Theories

We review recent advances in the understanding of the Quantum Chromodynamics (QCD) transition and its nature, paying special attention to the analysis of chiral symmetry restoration within different approaches based on effective theories. After presenting some of the main aspects of the current knowledge of the phase diagram from the theoretical, experimental and lattice sides, we discuss some recent problems where approaches relying on effective theories have been particularly useful. In particular, the combination of ideas such as Chiral Perturbation Theory, unitarity and Ward Identities allows us to describe successfully several observables of interest. This is particularly relevant for quantities expected to be dominated by the light meson components of the hadron gas such as the scalar and topological susceptibilities. In addition, ward identities and effective Lagrangians provide systematic results regarding chiral and U ( 1 ) A partner degeneration properties which are of great importance for the interplay between those two transitions and the nature of chiral symmetry restoration. Special attention is paid to the connection of this theoretical framework with lattice simulations.

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