Some Results on Angular Characteristics of Relativistic Charged Particles Produced in 12C-emulsion Interactions at 4.5 A GeV/c

1998 ◽  
Vol 07 (06) ◽  
pp. 659-667 ◽  
Author(s):  
Prithipal Singh ◽  
H. Khushnood
Keyword(s):  
Charged Particles ◽  
Heavy Ion ◽  
Angular Distributions ◽  
Final State ◽  
Angular Characteristic ◽  
Ion Interactions ◽  
Singly Charged ◽  
Relativistic Particles

An attempt has been made to study the angular characteristic of relativistic charged particles produced in 4.5 A GeV/c 12C-emulsion collisions. The dependence of these characteristics on the multiplicity of the relativistic particles, Ns, has also been investigated. The results reveal that the angular distributions of relativistic particles do not depend on Ns, except at small angles where contribution of singly charged particles fragments enhances the number of relativistic charged particles. It is also observed that the maximum of pseudorapidity, η and <η> distributions, shifts towards the lower value of η with increasing multiplicity of Ns. The study of the rapidity dispersion of relativistic charged particles reveals that the clusterization effect occurs significantly among the final state relativistic particles produced in heavy ion interactions.

CHARACTERISTICS OF RELATIVISTIC CHARGED PARTICLES PRODUCED IN 24Mg–EMULSION INTERACTIONS AT 4.5A GeV/C

2001 ◽  
Vol 10 (01) ◽  
pp. 55-68 ◽  
Author(s):  
N. N. ABD ALLAH ◽  
S. A. H. ABOU-STEIT ◽  
M. MOHERY ◽  
S. S. ABDEL-AZIZ
Keyword(s):  
Charged Particles ◽  
Heavy Ion ◽  
Scaling Behavior ◽  
Final State ◽  
Azimuthal Correlations ◽  
Ion Interactions ◽  
Multiplicity Distributions ◽  
Pseudorapidity Distributions ◽  
Relativistic Particles

The interactions of 4.5A GeV/c 24 Mg nuclei with emulsion have been studied. The multiplicity distributions of all the produced target protons from 24 Mg –emulsion interactions has been found to obey the KNO scaling behavior. The angular characteristics of the relativistic charged particles have been investigated and their dependence on the multiplicity of the relativistic shower particles has been studied. The results reveal that increasing the multiplicity of the shower particles, leads to a shift of the peak of the pseudorapidity distributions towards the lower values of the pseudorapidity and also to a decrease of the average pseudorapidity. The study of the rapidity dispersion of the relativistic charged particles shows that the clusterization effect is significant among the final state of the relativistic particles produced in the heavy-ion interactions. Azimuthal correlations in the angles of the relativistic charged particles have been investigated.

The multiplicity characteristics of 7Li-Em interactions as a function of noninteracting projectile nucleons

2020 ◽  
Vol 29 (08) ◽  
pp. 2050063
Author(s):  
M. Mohery ◽  
E. M. Sultan ◽  
N. N. Abdallah ◽  
M. H. Farghaly
Keyword(s):  
Impact Parameter ◽  
Charged Particles ◽  
Heavy Ion ◽  
The Other ◽  
Total Charge ◽  
Secondary Particles ◽  
Ion Interactions ◽  
Charged Secondary ◽  
The Impact ◽  
Relativistic Particles

In this work, the interactions of 7Li nuclei with emulsion at 3 A GeV/c were studied. Multiplicity of the charged secondary particles as well as the charge of the outgoing projectile fragments were measured, while correlations among them are discussed. The values of the total charge of the noninteracting projectile nucleons and the average number of interacting projectile nucleons are estimated. The dependence of the secondary particles on the number of heavily-ionized tracks is analyzed. The results show that interactions of 7Li nuclei with emulsion nuclei exhibit a number of regularities, which had been noted in experiments with lighter nuclei. The absorption of relativistic particles, while increasing the degree of target destruction, is observed. The average multiplicities of the secondary charged particles depend on the impact parameter, as their values increase, while decreasing the impact parameter. The number of secondary charged particles in the heavy-ion interactions depends on the degree of disintegration of the target nuclei. This dependence is not observed in the case of the interaction of hadron with emulsion. The experimental data of the interaction of 7Li are systematically compared with the other interactions at different energies. The results agree with the corresponding results at nearly the same energy.

ON THE ENERGY AND MASS DEPENDENCE OF THE MULTIPLICITY IN RELATIVISTIC HEAVY-ION INTERACTIONS

1990 ◽  
Vol 05 (03) ◽  
pp. 169-174 ◽  
Author(s):  
M. I. ADAMOVICH ◽  
Y. A. ALEXANDROV ◽  
M. M. CHERNYAVSKY ◽  
S. G. GERASSIMOV ◽  
S. P. KHARLAMOV ◽  
...  
Keyword(s):  
Energy Range ◽  
Energy Dependence ◽  
Nuclear Emulsion ◽  
Particle Production ◽  
Heavy Ion ◽  
Mass Dependence ◽  
Ion Interactions ◽  
Binary Collisions ◽  
Singly Charged ◽  
Relativistic Particles

The average multiplicities of singly charged relativistic particles in oxygen-induced interactions with a nuclear emulsion target are studied over the energy range 2.1–200 A GeV. A similar energy dependence as for proton-induced interactions is observed. Both the number of participating nucleons and the number of binary collisions are shown to be of importance for the particle production.

Pseudorapidity distribution of relativistic singly charged particles in heavy-ion collisions at high energy

1999 ◽  
Vol 77 (4) ◽  
pp. 313-318 ◽  
Author(s):  
F -H Liu ◽  
Y A Panebratsev
Keyword(s):  
Experimental Data ◽  
Heavy Ion Collisions ◽  
Charged Particles ◽  
Heavy Ion ◽  
High Energy ◽  
Pseudorapidity Distribution ◽  
Ion Collisions ◽  
Singly Charged

The pseudorapidity distribution of relativistic singly charged particles produced in high-energy heavy-ion collisions is described by the thermalized cylinder picture. The calculated results are in agreement with the experimental data of lead-induced interactions at 158A GeV/c. PACS Nos.:25.75.-q and 25.75.Dw

Study of relativistic heavy-ion interactions and antiproton annihilation data: search for shock waves

1986 ◽  
Vol 64 (11) ◽  
pp. 1502-1508
Author(s):  
Dipak Ghosh ◽  
Jaya Roy ◽  
Ranjan Sengupta
Keyword(s):  
Shock Wave ◽  
Shock Waves ◽  
Nuclear Matter ◽  
Heavy Ion ◽  
Angular Distributions ◽  
Incident Momentum ◽  
Antiproton Annihilation ◽  
Ion Interactions ◽  
Data Search ◽  
Wave Phenomena

The characteristics of 12C–AgBr interaction at 4.5-GeV∙c−1∙nucleon−1 incident momentum are studied by means of the photoemulsion technique, to search for shock-wave phenomena. The angular distributions indicate an anisotropic process in the nuclear matter. The results are compared with the antiproton–AgBr reaction observations of Breivik et al. (1983) at 1.4 GeV∙c−1.

Medium effects of charged particles in Xe+Xe collisions at s NN = 5.44 TeV using modified Tsallis distribution

2021 ◽  
Vol 36 (07) ◽  
pp. 2150059
Author(s):  
Pramod Kumar ◽  
P. K. Khandai ◽  
Kapil Saraswat ◽  
V. Singh
Keyword(s):  
Good Description ◽  
Charged Particles ◽  
Heavy Ion ◽  
Transverse Flow ◽  
Original Form ◽  
Published Data ◽  
Medium Effects ◽  
Final State ◽  
Particle Spectra ◽  
Tsallis Distribution

We present a systematic study of transverse momentum [Formula: see text] spectra of charged particles in [Formula: see text] and Xe[Formula: see text]Xe collisions at [Formula: see text] TeV. The published data of invariant yields of charged particles as a function of [Formula: see text] is taken from ALICE at LHC in the mid-pseudorapidity region [Formula: see text]. The modified form of Tsallis distribution is used here to analyze the [Formula: see text] spectra of charged particles. The power law of Tsallis/Hagedorn form gives very good description of the charged particle spectra in [Formula: see text] collisions within a [Formula: see text] range of 0.15 GeV/[Formula: see text] to 50 GeV/[Formula: see text]. When we go from [Formula: see text] collisions to heavy-ion (Xe[Formula: see text]Xe) collisions, the original form of Tsallis/Hagedorn distribution is not able to describe the [Formula: see text] spectra of charged particles properly. This may be occurred due to the medium effects or the final state effects. Here we discuss two types of medium effects of charged particles in Xe[Formula: see text]Xe collisions, one is the transverse flow in the low to intermediate [Formula: see text] region ([Formula: see text] GeV/[Formula: see text]) and the other is the energy loss in the high [Formula: see text] region ([Formula: see text] GeV/[Formula: see text]), using the modified Tsallis distribution.

scholarly journals Multiplicity and pseudorapidity distributions of charged particles from32S induced heavy ion interactions at 200A GeV

1992 ◽  
Vol 55 (4) ◽  
pp. 539-548 ◽  
Author(s):  
R. Albrecht ◽  
T. C. Awes ◽  
C. Baktash ◽  
P. Beckmann ◽  
F. Berger ◽  
...  
Keyword(s):  
Charged Particles ◽  
Heavy Ion ◽  
Ion Interactions ◽  
Pseudorapidity Distributions

scholarly journals Characterising Charm Jet Properties with Azimuthal Correlations of D Mesons and Charged Particles with ALICE at the LHC

Proceedings ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 35
Author(s):  
Shyam Kumar for the ALICE Collaboration
Keyword(s):  
Heavy Ion Collisions ◽  
Charm Quark ◽  
Charged Particles ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Relativistic Heavy Ion Collisions ◽  
Pp Collisions ◽  
Final State ◽  
Essential Information ◽  
Ion Collisions

Charm quarks are produced via hard parton scattering in ultra-relativistic heavy-ion collisions, hence are ideal probes to study a possible de-confined state of matter, known as Quark Gluon Plasma (QGP). The angular correlation of a meson containing a charm quark with other charged particles in heavy-ion collisions can help in studying the properties of QGP. Similar studies in pp collisions can give insight about the charm production mechanism while in p-Pb collisions could provide essential information to disentangle final-state QGP-induced modifications from effects caused by cold nuclear matter. In this proceedings, the results are presented for p-Pb collisions at s NN = 5.02 TeV and pp collisions at s = 13 TeV, so far the highest available energy at the LHC. The results are compared with Monte Carlo (MC) simulations using PYTHIA and POWHEG event generators and with pp collision results at s = 7 TeV.

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