A study of particle–nucleus collisions at 24, 50, and 400 GeV/c

1982 ◽  
Vol 60 (10) ◽  
pp. 1523-1533 ◽  
Author(s):  
H. Khushnood ◽  
M. Irfan ◽  
M. Zafar ◽  
A. Ahmad ◽  
A. R. Khan ◽  
...  
Keyword(s):  
Quark Model ◽  
Target Nucleus ◽  
Incident Energy ◽  
Mass Number ◽  
Projectile Fragmentation ◽  
Fragmentation Region ◽  
Target Fragmentation ◽  
The Mean ◽  
Pseudorapidity Distributions

An attempt has been made to investigate multiplicity, dispersion, and pseudorapidity distributions of shower particles produced in 24, 50, and 400 GeV/c hadron–nucleus collisions. The study of pseudorapidity reveals that with the increase in the mass number of the target nucleus, the excess of particles appears in the target fragmentation region, shifting the maxima of the distributions towards smaller values of rapidity. Further, with the increase in the incident energy, the excess of particles appears in the projectile fragmentation region. Finally, on using the additive quark model, the mean normalized multiplicity has been observed to be independent of the energy and nature of the projectile, suggesting a new kind of scaling in hadron–nucleus collisions.

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].

On transverse momentum spectra of negative pions in 12C+181Ta collisions at 4.2A GeV/c

2014 ◽  
Vol 23 (12) ◽  
pp. 1450084 ◽  
Author(s):  
Khusniddin K. Olimov ◽  
Akhtar Iqbal ◽  
S. L. Lutpullaev ◽  
Imran Khan ◽  
Viktor V. Glagolev ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Projectile Fragmentation ◽  
Minimum Bias ◽  
Fragmentation Region ◽  
Rapidity Range ◽  
Gaussian Functions ◽  
Collision Centrality ◽  
Hadron Spectra ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra

We studied the dependences of the experimental transverse momentum spectra of the negative pions, produced in minimum bias 12 C +181 Ta collisions at a momentum of 4.2 GeV/c per nucleon, on the collision centrality and the pion rapidity range. To examine quantitatively, the change in the shape of the pt spectra of π- mesons with the change of collision centrality and the pion rapidity range, all the extracted pt spectra were fitted by the four different functions commonly used for describing the hadron spectra. The extracted values of the spectral temperatures T1 and T2 were consistently larger for the pt spectra of π- mesons coming from midrapidity range as compared to those of the negative pions generated in the target and projectile fragmentation regions. The spectral temperatures of the negative pions coming from projectile fragmentation region proved to be larger than the respective temperatures of the negative pions coming from target fragmentation region. The extracted spectral temperatures T1 and T2 of the pt spectra of π- mesons were compatible within the uncertainties for the peripheral, semicentral and central 12 C +181 Ta collision events, selected using the number of participant protons. It was observed that Hagedorn and Boltzmann functions are more appropriate for describing the transverse momentum spectra of the negative pions as contrasted to Simple Exponential and Gaussian functions.

Transverse energy production in the target fragmentation region in16O-nucleus reactions at 60 and 200A GeV

1990 ◽  
Vol 45 (4) ◽  
pp. 529-537 ◽  
Author(s):  
◽  
R. Albrecht ◽  
T. C. Awes ◽  
C. Baktash ◽  
P. Beckmann ◽  
...  
Keyword(s):  
Energy Production ◽  
Transverse Energy ◽  
Fragmentation Region ◽  
Target Fragmentation

Single-spin asymmetry of inclusive π 0-meson production in 40-GeV pion interactions with a polarized target in the target-fragmentation region

2004 ◽  
Vol 67 (8) ◽  
pp. 1495-1504 ◽  
Author(s):  
A. N. Vasiliev ◽  
V. N. Grishin ◽  
A. A. Derevschikov ◽  
V. I. Kravtsov ◽  
Yu. A. Matulenko ◽  
...  
Keyword(s):  
Spin Asymmetry ◽  
Meson Production ◽  
Single Spin Asymmetry ◽  
Fragmentation Region ◽  
Single Spin ◽  
Target Fragmentation ◽  
Polarized Target

scholarly journals Proton distributions in the target fragmentation region in proton-nucleus and nucleus-nucleus collisions at high energies

1992 ◽  
Vol 53 (2) ◽  
pp. 183-191 ◽  
Author(s):  
◽  
T. Åkesson ◽  
S. Almehed ◽  
A. L. S. Angelis ◽  
N. Armenise ◽  
...  
Keyword(s):  
Fragmentation Region ◽  
Target Fragmentation ◽  
High Energies
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