Rapidity distributions and rapidity–gap correlations in multiparticle production at 50 and 400 GeV/c

1985 ◽  
Vol 63 (4) ◽  
pp. 466-471 ◽  
Author(s):  
S. Ahmad ◽  
H. Ahrar ◽  
M. Zafar ◽  
M. Shafi
Keyword(s):  
Single Particle ◽  
Short Range ◽  
Charged Particles ◽  
Projectile Fragmentation ◽  
Proton Collisions ◽  
Secondary Particles ◽  
Target Mass ◽  
Rapidity Gap ◽  
Rapidity Distributions ◽  
Short Range Correlations

Results on the single particle rapidity distributions and rapidity–gap correlations among hadrons produced in 50 GeV/c π−-meson and 400 GeV/c proton collisions with emulsion nuclei have been investigated. Study of the rapidity distributions reveals that the projectile fragmentation is mass independent and the target fragmentation depends upon the target mass. From the rapidity–gap distributions, we find evidence for short-range correlations that indicate that the secondary particles are produced via cluster formations and each cluster should consist of at least three charged particles.

Pseudorapidity distribution and cluster formation in 50 and 400 GeV/c hadron–nucleus interactions

1984 ◽  
Vol 62 (3) ◽  
pp. 230-238 ◽  
Author(s):  
M. Irfan ◽  
H. Khushnood ◽  
A. Shakeel ◽  
A. R. Khan ◽  
M. Shafi
Keyword(s):  
Long Range ◽  
Short Range ◽  
Dominant Role ◽  
Cluster Formation ◽  
Pseudorapidity Distribution ◽  
Appreciable Change ◽  
Long Range Correlations ◽  
Rapidity Gap ◽  
Rapidity Distributions ◽  
Short Range Correlations

From the study of the pseudorapidity, η, distributions of charged shower particles produced in 50 GeV/c π− – nucleus and 400 GeV/c proton (p)–nucleus collisions, and their dependence on various parameters, the maxima of η distributions are noticed to shift towards smaller values of η with increasing Ng. Bimodality in the η distributions for all Ng groups has been observed to be completely absent in 50 GeV/c π− – nucleus interactions. Furthermore, the value of [Formula: see text] is found to decrease monotonically with increasing Ng, Ns, and Nh. The dispersions of the rapidity distributions D(η) do not, however, demonstrate any tendency of appreciable change with increasing Ng, except in the region of small Ng values. Finally, study of rapidity-gap length distributions reveals that the two-particle short-range correlations play a dominant role while the contribution of long-range correlations seems to be quite small.

CLUSTER PRODUCTION IN 14.5A GeV/c Si-NUCLEUS COLLISIONS

1999 ◽  
Vol 08 (02) ◽  
pp. 121-129 ◽  
Author(s):  
A. SHAKEEL ◽  
W. B. TAK ◽  
N. AHMAD ◽  
A. R. KHAN ◽  
M. ZAFAR ◽  
...  
Keyword(s):  
Charged Particles ◽  
Nuclear Collisions ◽  
Secondary Particles ◽  
High Energies ◽  
Rapidity Gap

Characteristics of clusters of relativistic charged secondaries produced in 14.5A GeV/c Si-nucleus collisions are investigated by examining the behaviour of the rapidity gap distribution. The findings reveal that the maximum number of relativistic charged particles constituting a cluster is four. Further, the size of the cluster is observed to remain essentially independent of the mass of the struck nucleus. A comparison of the result of the present study with those reported earlier for hadron-hadron and hadron-nucleus collisions indicates that similar mechanisms may operate in the production of secondary particles in both hadronic and nuclear collisions at high energies.

The Use of Coherent States in the Theory of Quantum Crystals

1972 ◽  
Vol 50 (16) ◽  
pp. 1815-1825 ◽  
Author(s):  
J. Noolandi ◽  
J. Van Kranendonk
Keyword(s):  
Correlation Function ◽  
Coherent State ◽  
Liquid Helium ◽  
Recent Work ◽  
Single Particle ◽  
Coherent States ◽  
Short Range ◽  
Particle Distributions ◽  
Quantum Crystals ◽  
Short Range Correlations

The coherent state formalism is applied to the calculation of the phonon frequencies in quantum crystals. The normal mode frequencies are determined using an expansion in powers of the displacements of the centers of the single-particle distributions rather than of the particles. The known results of the RPA and of Meissner's inversion of the displacement–displacement correlation function are derived in a simple way, and the connection with Feynman's method for liquid helium is discussed. The method of constant short-range correlations is introduced and compared with the recent work of Koehler and Werthamer.

Characteristics of clusters produced in nucleon–nucleus interactions at ultrahigh energies

1989 ◽  
Vol 67 (2-3) ◽  
pp. 119-127 ◽  
Author(s):  
D. P. Goyal ◽  
Animesh Kumar ◽  
K. Yugindro Singh ◽  
S. Singh
Keyword(s):  
Cross Section ◽  
Cluster Size ◽  
Channel Model ◽  
Charged Particles ◽  
Cosmic Ray ◽  
Primary Energy ◽  
Target Mass ◽  
Rapidity Gap ◽  
Cluster Density ◽  
The Cross

The phenomenon of cluster production in nucleon–nucleus interactions at ultrahigh energies [Formula: see text] has been investigated using the available cosmic-ray data. The rapidity gap distributions of charged particles in a nondiffractive region of the cross section are found to support the Snider two-channel model as opposed to the model of Quigg, Pirilla, and Thomas. The variation of cluster density and cluster size with the primary energy, multiplicity of shower particles, and nature of the target mass has also been studied.

scholarly journals The influence of state dependent short range correlations on the depletion of the nuclear Fermi sea

2020 ◽  
Vol 5 ◽  
pp. 158
Author(s):  
G. A. Lalazissis ◽  
S. E. Massen ◽  
C. P. Panos
Keyword(s):  
Shell Model ◽  
Single Particle ◽  
Short Range ◽  
State Dependence ◽  
Closed Shell ◽  
State Dependent ◽  
Occupation Numbers ◽  
Closed Shell Nuclei ◽  
The One ◽  
Short Range Correlations

The influence of state dependent short range correlations on the occupation numbers of the single particle shell model orbits of the doubly closed shell nuclei 16O and 40Ca is examined. The study shows that the effect of the state dependence of the short range correlations is rather small. The total depletion of the nuclear Fermi sea changes slightly compared with the one calculated by considering state independent short range correlations.

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