dorsal/arxiv
View SchemaThe order, shape and critical point for the quark-gluon plasma phase transition
| Authors | Ismail Zakout, Carsten Greiner, Jurgen Schaffner-Bielich |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0605052 |
| URL | https://arxiv.org/abs/nucl-th/0605052 |
| DOI | 10.1016/j.nuclphysa.2006.10.064 |
| Journal | Nucl.Phys.A781:150-200,2007 |
Abstract
The order, shape and critical point for the phase transition between the hadronic matter and quark-gluon plasma are considered in a thermodynamical consistent approach. The hadronic phase is taken as Van der Waals gas of all the known hadronic mass spectrum particles $m_H\le 2.0$ GeV as well as Hagedorn bubbles which correspond hadronic states with mass spectrum $m_H> 2.0$ GeV. The density of states for Hagedorn bubbles is derived by calculating the microcanonical ensemble for a bag of quarks and gluons with specific internal color-flavor symmetry. The mixed-grand and microcanonical ensembles are derived for massless and massive flavors. We find Hagedorn bubbles are strongly suppressed in the dilute hadronic matter and they appear just below the line of the phase transition. The order of the phase transition depends on Hagedorn bubble's internal color-flavor structure and the volume fluctuation as well. On the other hand, the highly compressed hadronic matter undergoes a smooth phase transition from the gas of known mass spectrum hadrons to another one dominated by Hagedorn bubbles with specific internal color-flavor structure before the phase transition to quark-gluon plasma takes place at last. The phase transition is found a first order for the intermediate and large chemical potentials. The existence of the tri-critical point depends on the modification of the bubble's internal structure specified by a phenomenological parameter $\gamma\propto\mu_B$ in the medium.
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"abstract": "The order, shape and critical point for the phase transition between the\nhadronic matter and quark-gluon plasma are considered in a thermodynamical\nconsistent approach. The hadronic phase is taken as Van der Waals gas of all\nthe known hadronic mass spectrum particles $m_H\\le 2.0$ GeV as well as Hagedorn\nbubbles which correspond hadronic states with mass spectrum $m_H\u003e 2.0$ GeV. The\ndensity of states for Hagedorn bubbles is derived by calculating the\nmicrocanonical ensemble for a bag of quarks and gluons with specific internal\ncolor-flavor symmetry. The mixed-grand and microcanonical ensembles are derived\nfor massless and massive flavors. We find Hagedorn bubbles are strongly\nsuppressed in the dilute hadronic matter and they appear just below the line of\nthe phase transition. The order of the phase transition depends on Hagedorn\nbubble\u0027s internal color-flavor structure and the volume fluctuation as well. On\nthe other hand, the highly compressed hadronic matter undergoes a smooth phase\ntransition from the gas of known mass spectrum hadrons to another one dominated\nby Hagedorn bubbles with specific internal color-flavor structure before the\nphase transition to quark-gluon plasma takes place at last. The phase\ntransition is found a first order for the intermediate and large chemical\npotentials. The existence of the tri-critical point depends on the modification\nof the bubble\u0027s internal structure specified by a phenomenological parameter\n$\\gamma\\propto\\mu_B$ in the medium.",
"arxiv_id": "nucl-th/0605052",
"authors": [
"Ismail Zakout",
"Carsten Greiner",
"Jurgen Schaffner-Bielich"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/j.nuclphysa.2006.10.064",
"journal_ref": "Nucl.Phys.A781:150-200,2007",
"title": "The order, shape and critical point for the quark-gluon plasma phase transition",
"url": "https://arxiv.org/abs/nucl-th/0605052"
},
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