Some interesting features of charged particles produced in high-energy hadron–emulsion collisions

1990 ◽  
Vol 68 (1) ◽  
pp. 67-73 ◽  
Author(s):  
H. Khushnood ◽  
A. R. Ansari ◽  
M. Irfan ◽  
U. Ali
Keyword(s):  
Angular Distribution ◽  
Target Nucleus ◽  
Charged Particles ◽  
High Energy ◽  
Average Multiplicity ◽  
Emission Characteristics ◽  
Multiplicity Distributions ◽  
Energy Hadron ◽  
The Moment ◽  
Moment Index

The emission characteristics of secondary charged particles produced in 400 GeV proton–emulsion interactions were compared with those obtained at other energies. The results revealed that the angular distribution of grey particles does not depend on the nature and energy of the projectile. The dependence of the average multiplicity of the grey, black, shower, and heavily ionizing tracks on the mass of the target nucleus (A) and the nature and energy of the projectiles are also examined. The ratio of the valance quarks in pions (π−) and protons (p) was found to be almost equal to the ratio of the grey particles produced in π−–A and p–A collisions at the same energy. The values of the normalized moments of the multiplicity distributions of charged shower particles in different Nh intervals were found to be nearly the same. However, this value increased with increasing values of the moment index, K. Finally, the values of the normalized and central moments were almost equal for both p–p and p–A interactions.

Features of relativistic charged particles produced in catastrophic destruction of heavy emulsion nuclei at 4.5 A GeV

1998 ◽  
Vol 76 (7) ◽  
pp. 559-566 ◽  
Author(s):  
P Singh ◽  
M S Khan ◽  
H Khushnood
Keyword(s):  
Poisson Distribution ◽  
Linear Dependence ◽  
Charged Particles ◽  
Average Multiplicity ◽  
Average Value ◽  
Multiplicity Distributions ◽  
Good Agreement ◽  
Fireball Model

Total disintegration events produced in 4.5 A GeV/c 12C--AgBr reactions are analysed to investigate the characteristics of secondary charged particles produced in such collisions. The results reveal that multiplicity distributions of grey, black, and relativistic charged particles agree with the Poisson distribution. The average multiplicity of grey particles is found to increase with the increasing mass of projectile, while the average value of black particles is found to decrease with the increasing mass of projectile. This result is in good agreement with the prediction of fireball model. Finally, the linear dependence of grey and compound multiplicities on black, heavy, and relativistic charged particles is also observed. PACS No.: 25.70

Characteristics of the total disintegration of AgBr nuclei by 24Mg and 32S nuclei at 4.5 A GeV/c

2000 ◽  
Vol 78 (10) ◽  
pp. 915-927 ◽  
Author(s):  
N N Abd-Allah
Keyword(s):  
Free Path ◽  
Incident Energy ◽  
Charged Particles ◽  
Mean Free Path ◽  
Average Multiplicity ◽  
Multiplicity Distributions ◽  
Inelastic Mean Free Path ◽  
Good Agreement ◽  
Fireball Model

The interactions of 4.5 A GeV/c 24Mg and 32S nuclei with emulsion were studied. The experimental inelastic mean free path for these interactions is compared with theoretically calculated values. The average multiplicities of the emitted secondary charged particles for total disintegration were investigated. Total disintegration events are analysed to investigate the characteristics of secondary charged particles produced in such collisions. The results show that the multiplicity distributions of relativistic charged particles agree with the Gaussion distribution. The average multiplicity of grey and black particles is in good agreement with the prediction of the fireball model. The probabilty of total disintegration of Ag(Br) nuclei by different projectiles is nearly independent of the incident energy. PACS No.: 25.70

Statistical hadronization and multiplicities in high-energy hadron–nucleus collisions

2017 ◽  
Vol 26 (03) ◽  
pp. 1750006 ◽  
Author(s):  
S. Sharma ◽  
M. Kaur ◽  
S. Thakur
Keyword(s):  
Statistical Mechanics ◽  
Particle Production ◽  
High Energy ◽  
High Energies ◽  
Gamma Distributions ◽  
Charged Particle Production ◽  
Tsallis Distribution ◽  
Multiplicity Distributions ◽  
Statistical Hadronization ◽  
Energy Hadron

Concepts from statistical mechanics and ensemble theory are applied to study the characteristic properties of charged particle production in hadron–nucleus collisions at high energy. In the present study we utilize the predictions from different approaches using statistical mechanics. The Tsallis q-statistics is used to study the regularity in multiplicity distributions in hadron–nucleus collisions at high energies as one of the interesting options. Gamma distributions and a possible microcanonical generalization of Tsallis distribution have also been exploited to describe the data.

Multiplicity distributions in high-energy hadron-nucleus collisions. II. Phenomenology

1989 ◽  
Vol 39 (9) ◽  
pp. 2573-2585 ◽  
Author(s):  
Xin-nian Wang ◽  
Rudolph C. Hwa
Keyword(s):  
High Energy ◽  
Multiplicity Distributions ◽  
Energy Hadron

scholarly journals Dependence of the ROT effect on the energy of different light charged particles and on the incident neutron energy

2021 ◽  
Vol 256 ◽  
pp. 00006
Author(s):  
Irina Guseva ◽  
Alexei Gagarski ◽  
Friedrich Gönnenwein ◽  
Yuri Gusev
Keyword(s):  
Angular Distribution ◽  
Angular Velocity ◽  
Compound Nucleus ◽  
Charged Particles ◽  
Ternary Fission ◽  
Incident Neutron ◽  
Incident Neutron Energy ◽  
Trajectory Calculations ◽  
The Moment ◽  
Light Charged Particles

The shift of the angular distribution of different light charged particles in ternary fission of 235U induced by polarized neutrons, the so-called ROT effect, was estimated by modified trajectory calculations, which take into account the rotation of the compound nucleus. In previous publications only α-particles were considered. It is shown here that inclusion of tritons significantly improves the agreement of the energy dependence of the ROT effect with experiment while the inclusion of 5He particles practically does not influence this dependence. In particular, the change in the magnitude of the ROT effect depending on the energy of incident neutrons is correctly predicted. Also, the ROT effect for gamma quanta and neutrons in binary fission is discussed along the same lines, because all mentioned effects are proportional to the effective angular velocity of the compound nucleus at the moment of scission.

scholarly journals Multiplicity moments using Tsallis statistics in high-energy hadron–nucleus interactions

2020 ◽  
Vol 29 (04) ◽  
pp. 2050021
Author(s):  
S. Sharma ◽  
G. Chaudhary ◽  
K. Sandeep ◽  
A. Singla ◽  
M. Kaur
Keyword(s):  
High Energy ◽  
Fixed Target ◽  
Charged Multiplicity ◽  
Tsallis Statistics ◽  
Gamma Distributions ◽  
Scaling Hypothesis ◽  
Target Experiment ◽  
Multiplicity Distributions ◽  
Energy Hadron ◽  
Experimental Values

The study of higher-order moments of a distribution and its cumulants constitute a sensitive tool to investigate the correlations between the particle produced in high-energy interactions. In our previous work, we have used the Tsallis [Formula: see text] statistics, NBD, Gamma and shifted Gamma distributions to describe the multiplicity distributions in [Formula: see text]-nucleus and [Formula: see text]-nucleus fixed target interactions at various energies ranging from [Formula: see text][Formula: see text]GeV to 800[Formula: see text]GeV. In this study, we have extended our analysis by calculating the moments using the Tsallis model at these fixed target experiment data. By using the Tsallis model, we have also calculated the average charged multiplicity and its dependence on energy. It is found that the average charged multiplicity and moments predicted by the Tsallis statistics are in much agreement with the experimental values and indicates the success of the Tsallis model on data from visual detectors. The study of moments also illustrates that KNO scaling hypothesis holds good at these energies.

Scaling of multiplicity distributions in high energy hadron collisions

1972 ◽  
Vol 40 ◽  
pp. 317-334 ◽  
Author(s):  
Z. Koba ◽  
H.B. Nielsen ◽  
P. Olesen
Keyword(s):  
High Energy ◽  
Multiplicity Distributions ◽  
Energy Hadron

Multiplicity distributions in high-energy hadron-nucleus collisions. I. Formalism

1989 ◽  
Vol 39 (9) ◽  
pp. 2561-2572 ◽  
Author(s):  
Rudolph C. Hwa ◽  
Xin-nian Wang
Keyword(s):  
High Energy ◽  
Multiplicity Distributions ◽  
Energy Hadron

Energy dependence of the fast fragment of the target nucleus in high energy hadron-nucleus interaction

1982 ◽  
Vol 32 (11) ◽  
pp. 1221-1224
Author(s):  
D. Ghosh ◽  
J. Roy ◽  
M. Basu ◽  
A. Bhattacharjee ◽  
T. Guhathakurta ◽  
...  
Keyword(s):  
Energy Dependence ◽  
Target Nucleus ◽  
High Energy ◽  
Nucleus Interaction ◽  
Energy Hadron

Multiplicity distributions and normalized cumulants of low- and high-energy hadron-hadron scattering. — II

1977 ◽  
Vol 38 (1) ◽  
pp. 38-49 ◽  
Author(s):  
M. Garetto ◽  
A. Giovannini ◽  
E. Calligarich ◽  
G. Cecchet ◽  
R. Dolfini ◽  
...  
Keyword(s):  
High Energy ◽  
Multiplicity Distributions ◽  
Energy Hadron
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