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

Nonstatistical fluctuations of target fragments emitted in high-energy nucleus–nucleus collisions

2002 ◽  
Vol 80 (2) ◽  
pp. 119-128
Author(s):  
N N Abd-Allah
Keyword(s):  
Excitation Energy ◽  
Impact Parameter ◽  
Target Nucleus ◽  
Incident Energy ◽  
Nuclear Emulsion ◽  
Residual Nucleus ◽  
High Energy ◽  
Critical Value ◽  
Nucleus Interaction ◽  
The Impact

Analysis of target-fragmented "black" particles in nuclear emulsion from high-energy relativistic interactions initiated by 28Si at 4.5 A GeV/c is investigated. The number of slowly emitted particles from the struck target nucleus is considered as a measure of the degree of excitation of the residual nucleus. This number shows a constant critical value, with the degree of the impact parameter or the degree of excitation. The target evaporation particles of nucleus–nucleus interaction reveal the existence of nonstatistical fluctuations in the azimuthal plane of the interaction. The asymmetry or nonstatistical fluctuations, while found to be independent of projectile mass or incident energy, are dependent on the excitation energy of the target nucleus. A multiparticle correlation is observed between created particles as well as target fragments. This assumes production of clusters. These clusters seem to be formed during the decoloring process. PACS No.: 25.70Mn

On mean number of collisions in high energy hadron-nucleus interaction

1983 ◽  
Vol 33 (4) ◽  
pp. 389-400
Author(s):  
J. Dolejší ◽  
J. Formánek
Keyword(s):  
High Energy ◽  
Nucleus Interaction ◽  
Energy Hadron

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.

Rearrangement collisions: two-particle exchange

1964 ◽  
Vol 277 (1369) ◽  
pp. 206-213 ◽  
Keyword(s):  
Energy Dependence ◽  
Cross Section ◽  
Born Approximation ◽  
High Energy ◽  
Electron Exchange ◽  
Final States ◽  
Particle Exchange ◽  
Exchange Cross Section

It is shown that the first Bom approximation for the exchange of two uncorrelated electrons should vanish. A formalism for the T matrix is presented which has this property. The high-energy result for the two-electron exchange cross-section previously calculated in first Born approximation behaves like E -7 . This result is in error due to a lack of orthogonality of initial and final states. When this is corrected the result for uncorrelated electrons has an energy dependence E -11 . The introduction of correlation gives terms behaving like E -10 which cannot be calculated unam biguously.

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