Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-06-08
Phys.Rev.C62:054904,2000
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX, 14 pages with 8 Postscript figures. Discussion added in introduction and conclusion, Fig. 8 added, few more references
Scientific paper
10.1103/PhysRevC.62.054904
The effect of subcritical hadron bubbles on a first-order quark-hadron phase transition is studied. These subcritical hadron bubbles are created due to thermal fluctuations, and can introduce a finite amount of phase mixing (quark phase mixed with hadron phase) even at and above the critical temperature. For reasonable choices of surface tension and correlation length, as obtained from the lattice QCD calculations, we show that the amount of phase mixing at the critical temperature remains below the percolation threshold. Thus, as the system cools below the critical temperature, the transition proceeds through the nucleation of critical-size hadron bubbles from a metastable quark-gluon phase (QGP), within an inhomogeneous background populated by an equilibrium distribution of subcritical hadron bubbles. The inhomogeneity of the medium results in a substantial reduction of the nucleation barrier for critical bubbles. Using the corrected nucleation barrier, we estimate the amount of supercooling for different parameters controlling the phase transition, and briefly discuss its implications to cosmology and heavy-ion collisions.
Gleiser Marcelo
Gupta Kumar S.
Mohanty Ajaya K.
Shukla Prabodh
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