Particle production in central Pb–Pb collisions at high energy

2002 ◽  
Vol 80 (8) ◽  
pp. 883-891
Author(s):  
F -H Liu
Keyword(s):  
Experimental Data ◽  
Transverse Momentum ◽  
Particle Production ◽  
High Energy ◽  
Recent Experimental Data ◽  
Na49 Collaboration ◽  
Momentum Distributions ◽  
Cylinder Model

The rapidity and transverse-momentum distributions of particles produced in central Pb–Pb collisions at high energy are analyzed by the thermalized cylinder model. The calculated results are compared and found to be in agreement with the recent experimental data of the NA49 Collaboration. PACS Nos.: 25.75-q, 24.10Pa

Production of negatively charged particles in nucleus–nucleus collisions at 200A GeV

2002 ◽  
Vol 80 (5) ◽  
pp. 525-532
Author(s):  
F -H Liu
Keyword(s):  
Experimental Data ◽  
Transverse Momentum ◽  
Charged Particles ◽  
High Energy ◽  
Momentum Distributions

Three isotropic emission fireballs are used to describe the rapidity (or pseudorapidity) and transverse momentum distributions of negatively charged particles produced in nucleus–nucleus collisions at high energy. The calculated results are compared and shown to be in agreement with the experimental data of 16O–Au, 32S–S, and 32S–Ag collisions at 200A GeV. PACS Nos.: 25.75-q, 24.10Pa

scholarly journals On J/ψ and Υ Transverse Momentum Distributions in High Energy Collisions

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Bao-Chun Li ◽  
Ting Bai ◽  
Yuan-Yuan Guo ◽  
Fu-Hu Liu
Keyword(s):  
Transverse Momentum ◽  
Particle Production ◽  
High Energy ◽  
Energy Collision ◽  
Collision System ◽  
High Energy Collision ◽  
Final State ◽  
Momentum Distributions ◽  
High Energy Collisions ◽  
Good Agreement

The transverse momentum distributions of final-state particles are very important for high energy collision physics. In this work, we investigate J/ψ and Υ meson distributions in the framework of a particle-production source, where Tsallis statistics are consistently incorporated. The results are in good agreement with the experimental data in p-p and p-Pb collisions at LHC energies. The temperature of the emission source and the nonequilibrium degree of the collision system are extracted.

Analysis of transverse momentum distributions of charged particles produced in CC interactions at 4.2 A GeV/c

2019 ◽  
Vol 34 (23) ◽  
pp. 1950187
Author(s):  
A. R. Gilani ◽  
Z. Wazir ◽  
M. K. Suleymanov ◽  
S. Kanwal ◽  
S. M. Aslam ◽  
...  
Keyword(s):  
Experimental Data ◽  
Transverse Momentum ◽  
Bubble Chamber ◽  
Nuclear Research ◽  
Cascade Model ◽  
Model Data ◽  
Simulation Data ◽  
The Third ◽  
Momentum Distributions ◽  
Number Of Particles

In this paper, the transverse momentum and maximum transverse momentum distributions of protons and pions produced in an event for CC collisions at 4.2 A GeV/c have been analyzed. This analysis is based on experimental data obtained from 2 m propane bubble chamber at Joint Institute for Nuclear Research, Dubna, Russia and simulation data obtained from Dubna cascade code. We observed three disparate zones for the transverse momentum distribution of the produced particles. The third zone where transverse momentum is greater than 0.375 GeV/c is restricted only for pions with transverse momentum approximately equal to 1 GeV/c, and for protons the restricted value of [Formula: see text] is [Formula: see text][Formula: see text]1.5 GeV/c. So contribution of pions to this region is less and decreases sharply than the contribution of protons. The results of cascade model are not fully compatible with the experimental results in the third [Formula: see text] region, as this region contains less number of particles for model data as compared with experimental data but is compatible in the case of [Formula: see text].

Transverse momentum and nuclear modification factor distributions of charged particles in p + Pb and p+p collisions at s NN = 5.02 TeV

2019 ◽  
Vol 34 (16) ◽  
pp. 1950120 ◽  
Author(s):  
Q. Ali ◽  
Y. Ali ◽  
M. Haseeb ◽  
M. Ajaz
Keyword(s):  
Experimental Data ◽  
Transverse Momentum ◽  
Charged Particles ◽  
Momentum Range ◽  
Nuclear Modification Factor ◽  
Nuclear Modification ◽  
Model Distribution ◽  
Momentum Distributions ◽  
Modification Factor ◽  
Good Agreement

Transverse momentum distributions and nuclear modification factor of integrated charged particles yield produced in p[Formula: see text]+[Formula: see text]Pb collisions at [Formula: see text] = 5.02 TeV are investigated in mid-rapidity regions of [Formula: see text] at one event multiplicity class 0–5% in the transverse momentum range of [Formula: see text]20 GeV/c. Simulations with EPOS-1.99, EPOS-LHC and QGSJETII-04 are compared with the ALICE data. All three models are in good agreement with each other up to [Formula: see text]3 GeV/c for transverse momentum distributions but after that QGSJETII-04 overpredicts the experimental data. EPOS-LHC seems to describe the experimental data quite well as compared to the other two models. The ratios of the kaons to pions and protons to pions are also presented where again EPOS-LHC provides good agreement with the ALICE data. In case of the nuclear modification factor, for (anti) pions and (anti) kaons, the model distribution is around 1, whereas it is greater than 1 in case of (anti) protons which shows Cronin enhancement.

DESCRIPTION OF (PSEUDO-)RAPIDITY DENSITY AND TRANSVERSE MOMENTUM DISTRIBUTIONS IN A WIDE ENERGY RANGE $(\sqrt{s} = 22.4\hbox{--}7000~{\rm GeV})$

2012 ◽  
Vol 27 (09) ◽  
pp. 1250043 ◽  
Author(s):  
AKINORI OHSAWA ◽  
EDISON HIROYUKI SHIBUYA ◽  
MASANOBU TAMADA
Keyword(s):  
Transverse Momentum ◽  
Energy Dependence ◽  
Particle Production ◽  
Center Of Mass ◽  
Wide Energy Range ◽  
Charged Multiplicity ◽  
Mass System ◽  
Rapidity Density ◽  
Momentum Distributions ◽  
Multiple Particle Production

The rapidity density and transverse momentum distributions of produced particles in multiple particle production are formulated assuming that the produced particles are emitted isotropically from several emitting centers. The energy distribution of produced particles in the rest frames of respective emitting centers is that of the Tsallis statistics. The distribution of emitting centers is flat with slanting cuts at both shoulders on the rapidity axis in the center of mass system. The formulation includes six adjustable parameters, among which four are energy dependent and more important and are determined so that the transverse momentum and the (pseudo-)rapidity density distributions fit to the data at various energies. The energy dependences of the four parameters, determined empirically, reproduce quite well the energy dependence of the average transverse momentum, that of the pseudo-rapidity density at η* = 0 and that of the charged multiplicity. The energy dependence of the inelasticity is either increasing or decreasing from the assumed value of K = 0.5 at [Formula: see text], due to lack of experimental data at the most-forward rapidity region. The pseudo-rapidity density distribution at LHC energy [Formula: see text] expected by the present formulation is compared with those by the other models.

Transverse-Momentum Distributions in High-Energy Collisions

1973 ◽  
Vol 7 (1) ◽  
pp. 133-139
Author(s):  
L. M. Saunders ◽  
Davison E. Soper
Keyword(s):  
Transverse Momentum ◽  
High Energy ◽  
Momentum Distributions ◽  
High Energy Collisions

scholarly journals Freeze-Out Parameters in Heavy-Ion Collisions at AGS, SPS, RHIC, and LHC Energies

2015 ◽  
Vol 2015 ◽  
pp. 1-20 ◽  
Author(s):  
Sandeep Chatterjee ◽  
Sabita Das ◽  
Lokesh Kumar ◽  
D. Mishra ◽  
Bedangadas Mohanty ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
High Energy ◽  
Particle Multiplicity ◽  
Charged Particle Multiplicity ◽  
Ion Collisions ◽  
Momentum Distributions ◽  
Chemical Freeze ◽  
Freeze Out

We review the chemical and kinetic freeze-out conditions in high energy heavy-ion collisions for AGS, SPS, RHIC, and LHC energies. Chemical freeze-out parameters are obtained using produced particle yields in central collisions while the corresponding kinetic freeze-out parameters are obtained using transverse momentum distributions of produced particles. For chemical freeze-out, different freeze-out scenarios are discussed such as single and double/flavor dependent freeze-out surfaces. Kinetic freeze-out parameters are obtained by doing hydrodynamic inspired blast wave fit to the transverse momentum distributions. The beam energy and centrality dependence of transverse energy per charged particle multiplicity are studied to address the constant energy per particle freeze-out criteria in heavy-ion collisions.

scholarly journals On Particle Production in Lead-Gold Collision and Azimuthal Anisotropy at Top SPS Energy

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Bao-Chun Li ◽  
Zhao Zhang
Keyword(s):  
Transverse Momentum ◽  
Thermal Model ◽  
Particle Production ◽  
Elliptic Flow ◽  
High Energy ◽  
Azimuthal Anisotropy ◽  
Evolution Process ◽  
High Energy Collisions

In a multisource thermal model, we analyze the dependence of elliptic flowv2on the transverse momentumPT. The model results are compared with the data ofπ-,KS0,p, andΛmeasured in Pb + Au collisions at top SPS energy, 17.3 GeV. It is found that the azimuthal anisotropy in the evolution process of high-energy collisions is correlated highly to the number of participant nucleons.

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