scholarly journals Effect of colour singletness of quark-gluon plasma in quark-hadron phase transition

1998 ◽  
Vol 5 (4) ◽  
pp. 711 ◽  
Author(s):  
Munshi Golam Mustafa ◽  
Dinesh Kumar Srivastava ◽  
Bikash Sinha
Keyword(s):  
Phase Transition ◽  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Hadron Phase

Effect of colour singletness of quark-gluon plasma in quark-hadron phase transition

1998 ◽  
Vol 5 (4) ◽  
pp. 711-718 ◽  
Author(s):  
Munshi Golam Mustafa ◽  
Dinesh Kumar Srivastava ◽  
Bikash Sinha
Keyword(s):  
Phase Transition ◽  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Hadron Phase

scholarly journals QCD PHASE TRANSITION IN DGP BRANE COSMOLOGY

2012 ◽  
Vol 21 (08) ◽  
pp. 1250069 ◽  
Author(s):  
K. ATAZADEH ◽  
A. M. GHEZELBASH ◽  
H. R. SEPANGI
Keyword(s):  
Phase Transition ◽  
Energy Density ◽  
Early Universe ◽  
Effective Temperature ◽  
Quark Gluon Plasma ◽  
Friedmann Equation ◽  
Gluon Plasma ◽  
High Energy ◽  
Brane World ◽  
High Energy Density

In the standard picture of cosmology it is predicted that a phase transition, associated with chiral symmetry breaking after the electroweak transition, has occurred at approximately 10μ seconds after the Big Bang to convert a plasma of free quarks and gluons into hadrons. We consider the quark-hadron phase transition in a Dvali, Gabadadze and Porrati (DGP) brane world scenario within an effective model of QCD. We study the evolution of the physical quantities useful for the study of the early universe, namely, the energy density, temperature and the scale factor before, during and after the phase transition. Also, due to the high energy density in the early universe, we consider the quadratic energy density term that appears in the Friedmann equation. In DGP brane models such a term corresponds to the negative branch (ϵ = -1) of the Friedmann equation when the Hubble radius is much smaller than the crossover length in 4D and 5D regimes. We show that for different values of the cosmological constant on a brane, λ, phase transition occurs and results in decreasing the effective temperature of the quark-gluon plasma and of the hadronic fluid. We then consider the quark-hadron transition in the smooth crossover regime at high and low temperatures and show that such a transition occurs along with decreasing the effective temperature of the quark-gluon plasma during the process of the phase transition.

scholarly journals FUSION OF STRINGS VS. PERCOLATION AND THE TRANSITION TO THE QUARK–GLUON PLASMA

1999 ◽  
Vol 14 (17) ◽  
pp. 2689-2704 ◽  
Author(s):  
M. A. BRAUN ◽  
C. PAJARES ◽  
J. RANFT
Keyword(s):  
Phase Transition ◽  
Quark Gluon Plasma ◽  
Critical Density ◽  
Gluon Plasma ◽  
Second Order ◽  
Plasma State ◽  
Hadronic Collisions

In most of the models of hadronic collisions, the number of exchanged color strings grows with energy and atomic numbers of the projectile and target. At high string densities interaction between them becomes important, which should melt them into the quark–gluon plasma state in the end. It is shown that under certain reasonable assumptions about the string interaction, a phase transition to the quark–gluon plasma indeed takes place in the system of many color strings. It may be of the first or second order, depending on the particular mechanism of the interaction. The critical string density is about unity in both cases. In the latter case the percolation of strings occurs above the critical density. The critical density may have already been reached in central Pb–Pb collisions at 158A GeV.

scholarly journals Phase transition of a finite quark-gluon plasma

1998 ◽  
Vol 57 (2) ◽  
pp. 908-915 ◽  
Author(s):  
C. Spieles ◽  
H. Stöcker ◽  
C. Greiner
Keyword(s):  
Phase Transition ◽  
Quark Gluon Plasma ◽  
Gluon Plasma

Hadronization during quark-gluon plasma phase transition

1996 ◽  
Vol 53 (2) ◽  
pp. 887-895 ◽  
Author(s):  
A. K. Mohanty ◽  
S. K. Kataria
Keyword(s):  
Phase Transition ◽  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
Plasma Phase
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