scholarly journals Bottomonium Suppression in Nucleus-Nucleus Collisions Using Effective Fugacity Quasi-Particle Model

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Indrani Nilima ◽  
Vineet Kumar Agotiya
Keyword(s):  
Experimental Data ◽  
Equation Of State ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Particle Model ◽  
Quasi Particle ◽  
Cornell Potential ◽  
Ion Collisions ◽  
Debye Mass ◽  
Dissociation Temperature

We have studied the equation of state and dissociation temperature of bottomonium state by correcting the full Cornell potential in isotropic medium by employing the effective fugacity quasi-particle Debye mass. We had also calculated the bottomonium suppression in an expanding, dissipative strongly interacting QGP medium produced in relativistic heavy-ion collisions. Finally we compared our results with experimental data from RHIC 200GeV/nucleon Au-Au collisions, LHC 2.76 TeV/nucleon Pb-Pb, and LHC 5.02 TeV/nucleon Pb-Pb collisions as a function of number of participants.

scholarly journals Equation of States and Charmonium Suppression in Heavy-Ion Collisions

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Indrani Nilima ◽  
Vineet Kumar Agotiya
Keyword(s):  
Equation Of State ◽  
Heavy Ion ◽  
Particle Model ◽  
Quasi Particle ◽  
Ion Collisions ◽  
Debye Mass ◽  
Charmonium Suppression ◽  
Quark Potential ◽  
Heavy Quark Potential ◽  
Charmonium States

The present article is the follow-up of our work Bottomonium suppression in quasi-particle model, where we have extended the study for charmonium states using quasi-particle model in terms of quasi-gluons and quasi quarks/antiquarks as an equation of state. By employing medium modification to a heavy quark potential thermodynamic observables, viz., pressure, energy density, speed of sound, etc. have been calculated which nicely fit with the lattice equation of state for gluon, massless, and as well massive flavored plasma. For obtaining the thermodynamic observables we employed the debye mass in the quasi particle picture. We extended the quasi-particle model to calculate charmonium suppression in an expanding, dissipative strongly interacting QGP medium (SIQGP). We obtained the suppression pattern for charmonium states with respect to the number of participants at mid-rapidity and compared it with the experimental data (CMS JHEP) and (CMS PAS) at LHC energy (Pb+Pb collisions, sNN = 2.76 TeV).

scholarly journals Effect of Magnetic Field on Dilepton Production Rate in Relativistic Heavy Ion Collisions

2020 ◽  
Vol 12 (2) ◽  
pp. 215-221
Author(s):  
P. K. Sethy ◽  
Y. Kumar ◽  
S. S. Singh
Keyword(s):  
Magnetic Field ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Particle Model ◽  
Heavy Ion Collision ◽  
Dilepton Production ◽  
Quasi Particle ◽  
Ion Collisions ◽  
Ion Collision ◽  
Good Agreement

It is believed that a transient strong magnetic field is generated in heavy-ion collision. The strength of this field perpendicular to the reaction plane and is estimated to be around eB=0.03GeV2 at RHIC and eB=0.3GeV2 at LHC. We study the effect of this magnetic field on dilepton yield using a modified quasi particle model. The results show a clear enhancement in dilepton yield and our result is in good agreement with the recently reported results.

STRONGLY INTERACTING QGP AND QUARKONIUM SUPPRESSION AT RHIC AND LHC ENERGIES

2012 ◽  
Vol 27 (02) ◽  
pp. 1250009 ◽  
Author(s):  
VINEET AGOTIYA ◽  
LATA DEVI ◽  
UTTAM KAKADE ◽  
BINOY KRISHNA PATRA
Keyword(s):  
Equation Of State ◽  
Degrees Of Freedom ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Relativistic Heavy Ion Collisions ◽  
Strongly Coupled ◽  
Cornell Potential ◽  
Ion Collisions ◽  
Strongly Interacting ◽  
Strongly Coupled Plasma

We have developed an equation of state for strongly interacting quark–gluon plasma (QGP) in the framework of strongly coupled plasma with appropriate modifications to take account of color and flavor degrees of freedom and the interactions among themselves. For this purpose we used the effective potential to improve the plasma parameter (Γ) by correcting the full Cornell potential with a dielectric function embodying the effects of the deconfined medium and not its Coulomb part alone and obtain the equation of state in terms of Γ. Our results on thermodynamic observables viz. pressure, energy density, speed of sound etc. nicely fit to the results of lattice equation of state for gluon, massless as well massive flavored plasma. We have then employed our equation of state to estimate the quarkonium suppression in an expanding QGP produced in the relativistic heavy-ion collisions. We have found that our predictions matches with the recent PHENIX data on the centrality dependence of J/ψ suppression in Au+Au collisions at BNL RHIC within the limit of other uncertainties. We have also predicted for the ϒ suppression in Pb+Pb collisions at LHC energy which could be tested in the ALICE experiments at CERN LHC.

scholarly journals Viscous Hydrodynamic Model for Relativistic Heavy Ion Collisions

2013 ◽  
Vol 2013 ◽  
pp. 1-25 ◽  
Author(s):  
A. K. Chaudhuri
Keyword(s):  
Experimental Data ◽  
Heavy Ion Collisions ◽  
Initial Conditions ◽  
Heavy Ion ◽  
High Energy ◽  
Relativistic Heavy Ion Collisions ◽  
Ion Collisions ◽  
Viscous Hydrodynamic ◽  
Recent Developments ◽  
Hydrodynamical Modeling

Viscous hydrodynamical modeling of relativistic heavy ion collisions has been highly successful in explaining bulk of the experimental data in RHIC and LHC energy collisions. We briefly review viscous hydrodynamics modeling of high energy nuclear collisions. Basic ingredients of the modeling, the hydrodynamic equations, relaxation equations for dissipative forces, are discussed. Hydrodynamical modeling being a boundary value problem, we discuss the initial conditions, freeze-out process. We also show representative simulation results in comparison with experimental data. We also discuss the recent developments in event-by-event hydrodynamics.

STUDY OF ISOSCALING PHENOMENA FOR PROJECTILE-LIKE FRAGMENTS

2006 ◽  
Vol 15 (08) ◽  
pp. 1803-1812
Author(s):  
Q. M. SU ◽  
D. Q. FANG ◽  
Y. G. MA ◽  
C. ZHONG ◽  
C. W. MA ◽  
...  
Keyword(s):  
Experimental Data ◽  
Equation Of State ◽  
Linear Dependence ◽  
Fermi Gas ◽  
Heavy Ion ◽  
Projectile Fragmentation ◽  
Reaction Systems ◽  
Nuclear Equation Of State ◽  
Ion Collisions ◽  
Grand Canonical

In the framework of a modified statistical abrasion-ablation (SAA) model, the isospin effect and isoscaling behavior in projectile fragmentation have been systematically investigated. The normalized peak differences and reduced isoscaling parameters are found to decrease with (Z proj -Z)/Z proj and have no significant dependence on the size of reaction systems. The linear dependence of α and |β| on [Formula: see text] or [Formula: see text] for projectile-like fragments is demonstrated, which is obtained for light fragments from multifragmentation in the grand-canonical limit. Assuming a Fermi-gas behavior, the excitation energy dependence of the symmetry energy coefficients are tentatively extracted from α and β which looks consistent with the experimental data. It is pointed out that the reduced isoscaling parameters can be used as an observable to study the excitation extent of system and asymmetric nuclear equation of state in heavy ion collisions.

scholarly journals Effects of equation of state on hydrodynamic expansion, spectra, flow harmonics and two-pion interferometry

2018 ◽  
Vol 27 (07) ◽  
pp. 1850058 ◽  
Author(s):  
Danuce M. Dudek ◽  
Wei-Liang Qian ◽  
Chen Wu ◽  
Otávio Socolowski ◽  
Sandra S. Padula ◽  
...  
Keyword(s):  
Equation Of State ◽  
Equations Of State ◽  
Initial Conditions ◽  
Heavy Ion ◽  
Baryon Density ◽  
Extensive Study ◽  
Relativistic Heavy Ion Collisions ◽  
Ion Collisions ◽  
Pion Interferometry ◽  
Hydrodynamic Evolution

We perform an extensive study of the role played by the equation of state (EoS) in the hydrodynamic evolution of the matter produced in relativistic heavy ion collisions. By using the same initial conditions and freeze-out scenario, the effects of different equations of state are compared by calculating their respective hydrodynamical evolution, particle spectra, harmonic flow coefficients [Formula: see text], [Formula: see text] and [Formula: see text] and two-pion interferometry radius parameters. The equations of state investigated contain distinct features, such as the nature of the phase transition, as well as strangeness and baryon density contents, which are expected to lead to different hydrodynamic responses. The results of our calculations are compared to the data recorded at two RHIC energies, 130[Formula: see text]GeV and 200[Formula: see text]GeV. The three equations of state used in the calculations are found to describe the data reasonably well. Differences can be observed among the studied observables, but they are quite small. In particular, the collective flow parameters are found not to be sensitive to the choice of the EOS, whose implications are discussed.

scholarly journals Searching for the QCD Critical Point with Net-Proton Number Fluctuations

2019 ◽  
Vol 64 (8) ◽  
pp. 766
Author(s):  
M. Szymański ◽  
M. Bluhm ◽  
K. Redlich ◽  
C. Sasaki
Keyword(s):  
Experimental Data ◽  
Critical Point ◽  
Beam Energy ◽  
Star Collaboration ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Critical Mode ◽  
Qcd Critical Point ◽  
Proton Number ◽  
Ion Collisions

Net-proton number fluctuations can be measured experimentally and, hence, provide a source of important information about the matter created during relativistic heavy ion collisions. Particularly, they may give us clues about the conjectured QCD critical point. In this work, the beam-energy dependence of ratios of the first four cumulants of the net-proton number is discussed. These quantities are calculated using a phenomenologically motivated model in which critical mode fluctuations couple to protons and antiprotons. Our model qualitatively captures both the monotonic behavior of the lowest-order ratio, as well as the non-monotonic behavior of higher-order ratios, as seen in the experimental data from the STAR Collaboration. We also discuss the dependence of our results on the coupling strength and the location of the critical point.

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