scholarly journals Multiplicity and pseudorapidity distributions of charged particles in asymmetric and deformed nuclear collisions in the wounded quark model

2016 ◽  
Vol 131 (12) ◽  
Author(s):  
O. S. K. Chaturvedi ◽  
P. K. Srivastava ◽  
Ashwini Kumar ◽  
B. K. Singh
Keyword(s):  
Quark Model ◽  
Charged Particles ◽  
Nuclear Collisions ◽  
Pseudorapidity Distributions

A study of inelastic hadron–nucleus interactions at 50 and 400 GeV

1984 ◽  
Vol 62 (3) ◽  
pp. 218-225 ◽  
Author(s):  
H. Ahrar ◽  
S. Ahmad ◽  
M. Zafar ◽  
M. Irfan ◽  
M. Shafi
Keyword(s):  
Quark Model ◽  
Charged Particles ◽  
Target Size ◽  
Projectile Fragmentation ◽  
Particle Multiplicity ◽  
Nuclear Mass ◽  
Target Fragmentation ◽  
Pseudorapidity Distributions ◽  
Grey Particle

Some results on multiplicity, mean normalized multiplicity, and pseudorapidity distributions of shower particles produced in pion–nucleus and proton–nucleus collisions at 50 and 400 GeV are presented and discussed. From the study of the pseudorapidity distributions, it is found that the projectile fragmentation is mass independent and the target fragmentation depends upon the target size. The effect of nuclear mass on the forward–backward asymmetry is also examined by using the grey particle multiplicity data. Upon using the additive quark model, a new kind of nuclear scaling is observed between RA4, in terms of created charged particles and [Formula: see text].

EMISSION OF RELATIVISTIC HADRONS IN THE BACKWARD HEMISPHERE IN NUCLEAR COLLISIONS

2005 ◽  
Vol 14 (06) ◽  
pp. 895-907 ◽  
Author(s):  
N. AHMAD ◽  
SHAKEEL AHMAD ◽  
M. M. KHAN ◽  
M. ZAFAR ◽  
M. IRFAN
Keyword(s):  
Charged Particle ◽  
Gaussian Distribution ◽  
Charged Particles ◽  
Nuclear Collisions ◽  
Relativistic Charged Particle ◽  
Space Angle ◽  
Pseudorapidity Distributions ◽  
Charged Particle Multiplicities

The behavior of the relativistic charged particle multiplicities and the pseudorapidity distributions for 4.5A and 14.5A GeV /c28 Si -nucleus interactions are investigated in terms of the number of emitted relativistic hadrons in the backward hemisphere, [Formula: see text] (relativistic charged particles emitted with space angle θs such that θs lies in the interval 90°≤θs≤270°). The η distribution of relativistic charged particles for the interactions with [Formula: see text] are found to be quite nicely fitted by a single Gaussian distribution (GD), while it is fitted by two distinct GD's when the interactions are not accompanied by backward relativistic hadrons. This, in turn, suggests that in the production of events having [Formula: see text] probably two different mechanisms operate.

scholarly journals The First Moment of Azimuthal Anisotropy in Nuclear Collisions from AGS to LHC Energies

2016 ◽  
Vol 2016 ◽  
pp. 1-16 ◽  
Author(s):  
Subhash Singha ◽  
Prashanth Shanmuganathan ◽  
Declan Keane
Keyword(s):  
Quark Gluon Plasma ◽  
Charged Particles ◽  
Theoretical Work ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Azimuthal Anisotropy ◽  
Flow Focusing ◽  
Nuclear Collisions ◽  
Ion Collisions ◽  
First Moment

We review topics related to the first moment of azimuthal anisotropy (v1), commonly known as directed flow, focusing on both charged particles and identified particles from heavy-ion collisions. Beam energies from the highest available, at the CERN LHC, down to projectile kinetic energies per nucleon of a few GeV per nucleon, as studied in experiments at the Brookhaven AGS, fall within our scope. We focus on experimental measurements and on theoretical work where direct comparisons with experiment have been emphasized. The physics addressed or potentially addressed by this review topic includes the study of Quark Gluon Plasma and, more generally, investigation of the Quantum Chromodynamics phase diagram and the equation of state describing the accessible phases.

THE HYDRODYNAMIC DESCRIPTION OF THE ENERGY AND CENTRALITY DEPENDENCES OF THE PSEUDORAPIDITY DISTRIBUTIONS OF THE PRODUCED CHARGED PARTICLES IN Au+Au COLLISIONS

2013 ◽  
Vol 22 (09) ◽  
pp. 1350069 ◽  
Author(s):  
ZHIJIN JIANG ◽  
QINGGUANG LI ◽  
GUANXIANG JIANG
Keyword(s):  
Hydrodynamic Model ◽  
Charged Particles ◽  
Heavy Ion ◽  
High Energy ◽  
Hydrodynamic Description ◽  
Gaussian Form ◽  
Ion Collisions ◽  
Phobos Collaboration ◽  
Rapidity Distributions ◽  
Pseudorapidity Distributions

By using the revised Landau hydrodynamic model and taking into account the effect of leading particles, we discuss the pseudorapidity distributions of produced charged particles in high energy heavy-ion collisions. The charged particles resulted from the freeze-out of the matter produced in collisions possess the Gaussian-like rapidity distributions. The leading particles are assumed having the rapidity distributions of the Gaussian form with the normalization constant being equal to the number of participants, which can be figured out in theory. It is found that the results from the revised Landau hydrodynamic model together with the contributions from leading particles are well consistent with the experimental data carried out by BNL-RHIC-PHOBOS Collaboration in different centrality Au + Au collisions at energies of [Formula: see text], 130 and 62.4 GeV , respectively.

scholarly journals A Description of Pseudorapidity Distributions of Charged Particles Produced in Au+Au Collisions at RHIC Energies

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Z. J. Jiang ◽  
Dongfang Xu ◽  
Yan Huang
Keyword(s):  
Phase Transition ◽  
Heavy Ion Collisions ◽  
Charged Particles ◽  
Dense Matter ◽  
Heavy Ion ◽  
High Energy ◽  
Low Energy ◽  
Ion Collisions ◽  
Rapidity Distributions ◽  
Pseudorapidity Distributions

In heavy ion collisions, charged particles come from two parts: the hot and dense matter and the leading particles. In this paper, the hot and dense matter is assumed to expand according to the hydrodynamic model including phase transition and decouples into particles via the prescription of Cooper-Frye. The leading particles are as usual supposed to have Gaussian rapidity distributions with the number equaling that of participants. The investigations of this paper show that, unlike low energy situations, the leading particles are essential in describing the pseudorapidity distributions of charged particles produced in high energy heavy ion collisions. This might be due to the different transparencies of nuclei at different energies.

scholarly journals Transverse Momentum and Pseudorapidity Distributions of Charged Particles and Spatial Shapes of Interacting Events in Pb-Pb Collisions at 2.76 TeV

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Fu-Hu Liu ◽  
Ya-Qin Gao ◽  
Tian Tian ◽  
Bao-Chun Li
Keyword(s):  
Transverse Momentum ◽  
Thermal Model ◽  
Center Of Mass ◽  
Charged Particles ◽  
Nucleon Pair ◽  
Mass Energy ◽  
Center Of Mass Energy ◽  
Rapidity Distributions ◽  
Pseudorapidity Distributions ◽  
Parameter Values

The transverse momentum and pseudorapidity distributions of charged particles produced in Pb-Pb collisions with different centrality intervals at center-of-mass energy per nucleon pairsNN=2.76 TeV have been analyzed by using the improved multisource thermal model in which the whole interacting system and then the sources are described by the Tsallis statistics. The modelling results are in agreement with experimental data of the ALICE Collaboration. The rapidity distributions of charged particles are obtained according to the extracted parameter values. The shapes of interacting events (the dispersion plots of charged particles) are given in the momentum, rapidity, velocity, and coordinate spaces. Meanwhile, the event shapes in different spaces consisted by different transverse quantities and longitudinal quantities are presented.

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