scholarly journals Transverse Energy Density Fluctuations in Heavy-Ion Collisions in a Gaussian Model

2012 ◽  
Vol 85 (11) ◽  
Author(s):  
Berndt Müller ◽  
Andreas Schäfer
Keyword(s):  
Energy Density ◽  
Heavy Ion Collisions ◽  
Transverse Energy ◽  
Gaussian Model ◽  
Heavy Ion ◽  
Density Fluctuations ◽  
Ion Collisions

Sudden increase in the degrees of freedom in dense QCD matter

2021 ◽  
Author(s):  
Aditya Nath Mishra ◽  
Guy Paić ◽  
C. Pajares ◽  
R. P. Scharenberg ◽  
B. K. Srivastava
Keyword(s):  
Charged Particle ◽  
Energy Density ◽  
Heavy Ion Collisions ◽  
Degrees Of Freedom ◽  
Initial Temperature ◽  
Heavy Ion ◽  
Particle Multiplicity ◽  
Sudden Increase ◽  
Alice Experiment ◽  
Ion Collisions

In this paper, we analyzed charged particle transverse momentum spectra in high multiplicity events in proton–proton and nucleus–nucleus collisions at LHC energies from the ALICE experiment using the color string percolation model (CSPM). The color reduction factor and associated string density parameters are extracted for various multiplicity classes in [Formula: see text] collisions and centrality classes for heavy-ion collisions at various LHC energies to study the effect of collision geometry and collision energy. These parameters are used to extract the thermodynamical quantities temperature and the energy density of the hot nuclear matter. A universal scaling is observed in initial temperature when studied as a function of charged particle multiplicity scaled by transverse overlap area. From the measured initial energy density [Formula: see text] and the initial temperature T, a dimensionless quantity [Formula: see text] is constructed which is used to obtain the degrees of freedom (DOF) of the deconfined phase. A two-step behavior and a sudden increase in DOF of [Formula: see text]47 for the ideal gas, above the hadronization temperature (T [Formula: see text] 210[Formula: see text]MeV), are observed in case of heavy-ion collisions at LHC energies.

scholarly journals Model comparison for initial density fluctuations in high-energy heavy-ion collisions

2020 ◽  
Vol 102 (5) ◽  
Author(s):  
Stefan Floerchinger ◽  
Eduardo Grossi ◽  
Kianusch Vahid Yousefnia
Keyword(s):  
Heavy Ion Collisions ◽  
Model Comparison ◽  
Initial Density ◽  
Heavy Ion ◽  
High Energy ◽  
Density Fluctuations ◽  
Ion Collisions
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