scholarly journals A viscous blast-wave model for heavy-ion collisions

2017 ◽  
Vol 779 ◽  
pp. 012065 ◽  
Author(s):  
Amaresh Jaiswal ◽  
Volker Koch
Keyword(s):  
Blast Wave ◽  
Heavy Ion Collisions ◽  
Wave Model ◽  
Heavy Ion ◽  
Ion Collisions

Average transverse expansion velocities and global freeze-out temperatures in central Cu + Cu, Au + Au, and Pb + Pb collisions at high energies at RHIC and LHC

2020 ◽  
Vol 35 (14) ◽  
pp. 2050115 ◽  
Author(s):  
Khusniddin K. Olimov ◽  
Shakhnoza Z. Kanokova ◽  
Kosim Olimov ◽  
Kadyr G. Gulamov ◽  
Bekhzod S. Yuldashev ◽  
...  
Keyword(s):  
Blast Wave ◽  
Heavy Ion Collisions ◽  
Wave Model ◽  
Heavy Ion ◽  
Transverse Flow ◽  
Collision System ◽  
Transverse Expansion ◽  
Ion Collisions ◽  
Charged Pions ◽  
Freeze Out

The experimental invariant transverse momentum [Formula: see text] spectra of the charged pions and kaons, protons and antiprotons, produced at midrapidity in central (0–10%) Au[Formula: see text]Au collisions at [Formula: see text], central (0–10%) Cu[Formula: see text]Cu collisions at [Formula: see text], central (0–10%) Au[Formula: see text]Au collisions at [Formula: see text], and central (0–5%) Pb[Formula: see text]Pb collisions at [Formula: see text], measured by BRAHMS, STAR and ALICE collaborations, were analyzed using three different transverse expansion (blast-wave) models: Siemens–Rasmussen blast-wave model, Simple transverse flow model, and Simplified (hydro-inspired) blast-wave model of Schnedermann et al. Combined (simultaneous) minimum [Formula: see text] fits of the experimental invariant [Formula: see text] spectra of the charged pions and kaons, protons and antiprotons with the above three model functions were conducted, using the identical selected optimal fitting ranges in [Formula: see text] in each studied collision system, and the values of the average transverse expansion velocity [Formula: see text] and global kinetic freeze-out temperature [Formula: see text] and their dependencies on the collision system [Formula: see text] and [Formula: see text] were extracted. The combined (simultaneous) fits using Hagedorn formula with the (embedded) simple transverse flow describe well the experimental invariant [Formula: see text] spectra of the charged pions, kaons, protons and antiprotons in the whole measured range in region [Formula: see text] in the analyzed central heavy ion collisions at RHIC and LHC, reproducing qualitatively well all the established dependencies of the parameters [Formula: see text] and [Formula: see text] on the collision system [Formula: see text] and [Formula: see text]. The obtained results were compared with those of the previous analyses of high energy heavy ion collisions.

scholarly journals A Review of Elliptic Flow of Light Nuclei in Heavy-Ion Collisions at RHIC and LHC Energies

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Md. Rihan Haque ◽  
Chitrasen Jena ◽  
Bedangadas Mohanty
Keyword(s):  
Blast Wave ◽  
Heavy Ion Collisions ◽  
Elliptic Flow ◽  
Theoretical Models ◽  
Heavy Ion ◽  
Light Nuclei ◽  
Centrality Dependence ◽  
Ion Collisions ◽  
The Difference ◽  
Wave Models

We present a review of the measurements of elliptic flow (v2) of light nuclei (d, d¯, t, He3, and He¯3) from the RHIC and LHC experiments. Light (anti)nuclei v2 have been compared with that of (anti)proton. We observed a similar trend in light nuclei v2 to that in identified hadron v2 with respect to the general observations such as pT dependence, low pT mass ordering, and centrality dependence. We also compared the difference of nuclei and antinuclei v2 with the corresponding difference of v2 of proton and antiproton at various collision energies. Qualitatively they depict similar behavior. We also compare the data on light nuclei v2 to various theoretical models such as blast-wave and coalescence. We then present a prediction of v2 for He3 and He4 using coalescence and blast-wave models.

scholarly journals Vorticity and particle polarization in heavy ion collisions (experimental perspective)

2018 ◽  
Vol 171 ◽  
pp. 07002 ◽  
Author(s):  
Sergei A. Voloshin
Keyword(s):  
Heavy Ion Collisions ◽  
Wave Model ◽  
Heavy Ion ◽  
Beam Direction ◽  
Future Directions ◽  
Anisotropic Flow ◽  
Circular Pattern ◽  
Central Collisions ◽  
Ion Collisions ◽  
Vorticity Component

The recent measurements of the global polarization and vector meson spin alignment along the system orbital momentum in heavy ion collisions are briefly reviewed. A possible connection between the global polarization and the chiral anomalous effects is discussed along with possible experimental checks. Future directions, in particular those aimed on the detailed mapping of the vorticity fields, are outlined. The Blast Wave model is used for an estimate of the anisotropic flow effect on the vorticity component along the beam direction. We also point to a possibility of a circular pattern in the vorticity field in asymmetric, e.g. Cu+Au, central collisions.

scholarly journals Production of Kaon andΛin Nucleus-Nucleus Collisions at Ultrarelativistic Energy from a Blast-Wave Model

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
S. Zhang ◽  
Y. G. Ma ◽  
J. H. Chen ◽  
C. Zhong
Keyword(s):  
Blast Wave ◽  
Particle Production ◽  
Wave Model ◽  
Heavy Ion ◽  
Relativistic Energy ◽  
Ion Collisions ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra ◽  
Good Agreement ◽  
Freeze Out

The particle production of Kaon andΛis studied in nucleus-nucleus collisions at relativistic energy based on a chemical equilibrium blast-wave model. The transverse momentum spectra of Kaon andΛat the kinetic freeze-out stage from our model are in good agreement with the experimental results. The kinetic freeze-out parameters of temperatureTkinand radial flow parameterρ0are presented for the FOPI, RHIC, and LHC energies. And the resonance decay effect is also discussed. The systematic study for beam energy dependence of the strangeness particle production will help us to better understand the properties of the matter created in heavy-ion collisions at the kinetic freeze-out stage.

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