scholarly journals EFFECTS OF CURVATURE AND INTERACTIONS ON THE DYNAMICS OF THE DECONFINEMENT PHASE TRANSITION

2004 ◽  
Vol 19 (30) ◽  
pp. 5221-5235
Author(s):  
DEEPAK CHANDRA ◽  
ASHOK GOYAL
Keyword(s):  
Phase Transition ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Ion Collisions ◽  
Hadron Gas ◽  
Curvature Energy ◽  
Speed Up ◽  
Hadronization Process ◽  
Deconfinement Phase Transition ◽  
Tension Increase

We study the dynamics of first-order confinement-deconfinement phase transition through nucleation of hadronic bubbles in an expanding quark–gluon plasma in the context of heavy ion collisions for interacting quark and hadron gas and by incorporating the effects of curvature energy. We find that the interactions reduce the delay in the phase transition whereas the curvature energy has a mixed behavior. In contrast to the case of early Universe phase transition, here lower values of surface tension increase the supercooling and slow down the hadronization process. Higher values of bag pressure tend to speed up the transition. Another interesting feature is the start of the hadronization process as soon as the QGP is created.

CHARMONIUM PRODUCTION IN Pb–Pb COLLISIONS AT ALICE: FROM SUPPRESSION TO REGENERATION?

2013 ◽  
Vol 28 (21) ◽  
pp. 1330018 ◽  
Author(s):  
ENRICO SCOMPARIN
Keyword(s):  
Phase Transition ◽  
Cross Sections ◽  
Short Review ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Alice Experiment ◽  
Model Calculations ◽  
Ion Collisions ◽  
Quark Production ◽  
History Of

Heavy quarkonium states are considered as one of the key observables for the study of the phase transition from a system made of hadrons towards a Quark–Gluon Plasma (QGP). In the last 25 years, experiments at CERN and Brookhaven have studied collisions of heavy ions looking for a suppression of charmonia/bottomonia, considered as a signature of the phase transition. After an introduction to the main concepts behind these studies and a short review of the SPS and RHIC results, I will describe the results obtained in Pb – Pb collisions by the ALICE experiment at the LHC. The ALICE findings will be critically compared to those of lower energy experiments, to CMS results, and to model calculations. The large cross-sections for heavy-quark production at LHC energies are expected to induce a novel production mechanism for charmonia in heavy-ion collisions, related to a recombination of [Formula: see text] pairs along the history of the collision and/or at hadronization. The occurrence of such a process at the LHC will be discussed. Finally, prospects for future measurements will be shortly addressed.

INFLUENCE OF LONG-RANGE CORRELATION ON THE SCALING PROPERTIES OF THE NORMALIZED FACTORIAL CORRELATORS IN RELATIVISTIC HEAVY-ION COLLISIONS

2013 ◽  
Vol 22 (08) ◽  
pp. 1350059 ◽  
Author(s):  
X. Z. BAI ◽  
C. B. YANG
Keyword(s):  
Phase Transition ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Relativistic Heavy Ion Collisions ◽  
Ginzburg Landau ◽  
Scaling Properties ◽  
Ion Collisions ◽  
Range Correlation ◽  
Dynamical Fluctuations ◽  
Second Order Phase Transition

The effect of multiplicity correlation between two bins to the dynamical fluctuations is investigated for a second-order phase transition from quark–gluon plasma (QGP) to hadrons, within the Ginzburg–Landau description for the transition. Normalized factorial correlators are used to characterize the dynamical fluctuations. A scaling behavior among the correlators is found, and an approximate universal exponent is obtained with very weak dependence on the details of the phase transition.

ULTRARELATIVISTIC NUCLEAR PHYSICS: FROM BECOMING TO BEING

1989 ◽  
Vol 04 (15) ◽  
pp. 3717-3757 ◽  
Author(s):  
W. M. GEIST
Keyword(s):  
Phase Transition ◽  
Quark Gluon Plasma ◽  
Nuclear Physics ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Plasma Properties ◽  
Ion Collisions

Basic theoretical ideas on a phase transition in heavy ion collisions to a thermalized plasma of free quarks and gluons are outlined. Major experiments are then described which made use of oxygen and sulphur beams with moderate (BNL) or high (CERN) momenta. Representative results pertaining to both average event features and quark-gluon plasma properties are discussed in some detail. This review addresses also interested non-specialists.

scholarly journals Review of QCD, cosmological phase transitions, QGP, heavy quark meson production enhancement and suppression

2017 ◽  
Vol 32 (15) ◽  
pp. 1730008 ◽  
Author(s):  
Leonard S. Kisslinger
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Heavy Quark ◽  
Quark Gluon Plasma ◽  
Meson Production ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Relativistic Heavy Ion Collisions ◽  
Ion Collisions ◽  
Present Universe

This review of the quantum chromodynamics (QCD), the early universe cosmological phase transition from the quark–gluon plasma (QGP) to our present universe (QCDPT), relativistic heavy ion collisions (RHIC) which can produce the QGP, the possible detection of the QGP produced by the production of mixed hybrid heavy quark mesons. We also review the recent studies of the production of mixed heavy quark hybrids via RHIC and heavy quark meson suppression in p-Pb and Pb–Pb collisions.

scholarly journals Monte-Carlo simulation of the 1st order hadron-QGP phase transition in heavy ion collisions using a parton model

2020 ◽  
Vol 56 (1) ◽  
pp. 84-91
Author(s):  
Yu. A. Rusak ◽  
L. F. Babichev
Keyword(s):  
Phase Transition ◽  
Monte Carlo ◽  
Heavy Ion Collisions ◽  
Parton Model ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Heavy Nuclei ◽  
Total N ◽  
Ion Collisions ◽  
Probabilistic Process

Quark gluon plasma (QGP) is a special state of nuclear matter where quarks and gluons behave like free particles. Recently, a number of investigations of this state with high temperature and/or density have been conducted using collisions of relativistic and ultra-relativistic heavy nuclei. It is accepted that depending on the temperature and density, 1st or the 2nd order phase transitions take place in hadron matter during the formation of QGP. Herein, we have modeled heavy ion collisions using a HIJING Monte-Carlo generator, taking into account the description of the 1st order phase transition as a probabilistic process. We analyzed the behavior of the fluctuations of the total (N = N+ – N–) and resultant (Q = N+ – N–) electric charges of the system. Different phases were introduced using the BDMPS (Baier – Dokshitzer – Mueller – Piegne – Schiff) model of parton energy loss during crossing through a dense nuclear medium.

scholarly journals Dilepton flow and deconfinement phase transition in heavy ion collisions

2011 ◽  
Vol 701 (5) ◽  
pp. 581-586 ◽  
Author(s):  
Jian Deng ◽  
Qun Wang ◽  
Nu Xu ◽  
Pengfei Zhuang
Keyword(s):  
Phase Transition ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Ion Collisions ◽  
Deconfinement Phase Transition

scholarly journals DECONFINEMENT, MONOPOLES AND NEW PHENOMENA IN HEAVY ION COLLISIONS

2010 ◽  
Vol 25 (02n03) ◽  
pp. 532-542 ◽  
Author(s):  
EDWARD SHURYAK
Keyword(s):  
Electric Fields ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Flux Tubes ◽  
Influence Propagation ◽  
Ion Collisions ◽  
Magnetic Screening ◽  
Small Density ◽  
Deconfinement Phase Transition ◽  
New Phenomena

We discuss various manifestations of the "magnetic scenario" for the quark-gluon plasma viewed as a mixture of two plasmas, of electrically (quark and gluons) as well as magnetically charged quasiparticles. Near the deconfinement phase transition, T ≈ Tc very small density of free quarks should lead to negligible screening of electric field while magnetic screening remains strong. The consequence of this should be existence of a "corona" of the QGP, in a way similar to that of the Sun, in which electric fields influence propagation of perturbations and even form metastable flux tubes. The natural tool for its description is (dual) magnetohydrodynamics: among observable consequences is splitting of sound into two modes, with larger and smaller velocity. The latter can be zero, hinting for formation of pressure-stabilized flux tubes. Remarkably, recent experimental discoveries at RHIC show effects similar to expected for "corona structures". In dihadron correlation function with large-pt trigger there are a "cone" and a "hard ridge", while the so called "soft ridge" is a similar structure seen without hard trigger. They seem to be remnants of flux tubes, which – contrary to naive expectations – seem to break less often in near-Tc matter than do confining strings in vacuum.

scholarly journals Study of Deconfinement Phase Transition in Heavy Ion Collisions at BNL Energies

2013 ◽  
pp. 289-292 ◽  
Author(s):  
M. Ayaz Ahmad ◽  
Mir H. Rasool ◽  
Shafiq Ahmad ◽  
Jamal B. H. Madani ◽  
Rachid Ayad
Keyword(s):  
Phase Transition ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Ion Collisions ◽  
Deconfinement Phase Transition
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