A study of the rapidity-gap distribution of showers by eliminating phase-space effects

1987 ◽  
Vol 65 (7) ◽  
pp. 790-792 ◽  
Author(s):  
A. Tufail ◽  
H. Ahrar ◽  
S. Ahmad ◽  
M. Zafar ◽  
M. Shafi
Keyword(s):  
Phase Space ◽  
Multiparticle Production ◽  
Rapidity Gap ◽  
Space Effects

The rapidity-gap method has been used to check the formation of clusters in multiparticle production at 50, 340, and 400 GeV∙c−1. Pseudoevents have been generated to eliminate the phase-space effects from the rapidity-gap distributions.

A study of the multiparticle production process in 340 GeV/c π− interactions with emulsion nuclei using the method of rapidity-gap distribution of showers

1991 ◽  
Vol 69 (11) ◽  
pp. 1373-1375
Author(s):  
A. Tufail ◽  
Taiyab Taiyab ◽  
S. Ahmad ◽  
A. R. Khan ◽  
M. Zafar ◽  
...  
Keyword(s):  
Phase Space ◽  
Production Process ◽  
Short Range ◽  
Multiparticle Production ◽  
Π Interactions ◽  
Rapidity Gap ◽  
Space Effect ◽  
Space Effects

The multiparticle production process was investigated using the method of rapidity-gap distribution of showers. To eliminate the phase-space effects from these distributions, pseudoevents were generated. The short-range rapidity-gap correlation observed is greater than expected for a phase-space effect thus giving evidence for the production of clusters in the process.

Rapidity gap distributions and clustering in multiparticle production

1975 ◽  
Vol 57 (4) ◽  
pp. 369-372 ◽  
Author(s):  
A. Krzywicki ◽  
C. Quigg ◽  
G.H. Thomas
Keyword(s):  
Multiparticle Production ◽  
Rapidity Gap

Self-affine fluctuations of pions and protons and nonthermal phase transition in hadron–nucleus interactions

2008 ◽  
Vol 86 (12) ◽  
pp. 1449-1459 ◽  
Author(s):  
D Ghosh ◽  
A Deb ◽  
S Pal ◽  
J Ghosh
Keyword(s):  
Phase Transition ◽  
Phase Space ◽  
Production Process ◽  
Hurst Exponent ◽  
Factorial Moment ◽  
Multiparticle Production ◽  
Two Dimensional ◽  
Dimensional Phase Space ◽  
Compound Multiplicity ◽  
Multiplicity Distributions

The paper reports a study revealing self-affine fluctuations in pion, proton, and compound multiplicity (of pions combined with protons) spectra obtained from the interactions of 350 GeV pions with AgBr nuclei. The study is performed in the transformed two-dimensional phase space of the emission and azimuthal angles using the factorial moment methodology and the concept of the Hurst exponent. Evidence of a nonthermal phase transition is obtained for self-affine fluctuations of pions along with an indication for such a regime to be seen in similar fluctuations of proton and compound multiplicity distributions. The study bridges the anisotropic nature of the multiparticle production process and an evidence of the nonthermal phase transition with similar earlier findings from hadron–hadron and nucleus–nucleus interactions and shows the same effects to be peculiar features of the multiplicity distributions of the different species of particles produced. All this brings important information about the underlying dynamics of the hadroproduction process.PACS Nos.: 25.80.Hp, 24.60.Ky, 13.85.–t

scholarly journals Some intriguing aspects of multiparticle production processes

2018 ◽  
Vol 33 (10) ◽  
pp. 1830008 ◽  
Author(s):  
Grzegorz Wilk ◽  
Zbigniew Włodarczyk
Keyword(s):  
Phase Space ◽  
Initial Energy ◽  
Oscillatory Behavior ◽  
Hadronic Matter ◽  
Multiparticle Production ◽  
Detailed Knowledge ◽  
Sound Waves ◽  
Production Processes ◽  
Alternative Approach ◽  
Multiplicity Distributions

Multiparticle production processes provide valuable information about the mechanism of the conversion of the initial energy of projectiles into a number of secondaries by measuring their multiplicity distributions and their distributions in phase space. They therefore serve as a reference point for more involved measurements. Distributions in phase space are usually investigated using the statistical approach, very successful in general but failing in cases of small colliding systems, small multiplicities, and at the edges of the allowed phase space, in which cases the underlying dynamical effects competing with the statistical distributions take over. We discuss an alternative approach, which applies to the whole phase space without detailed knowledge of dynamics. It is based on a modification of the usual statistics by generalizing it to a superstatistical form. We stress particularly the scaling and self-similar properties of such an approach manifesting themselves as the phenomena of the log-periodic oscillations and oscillations of temperature caused by sound waves in hadronic matter. Concerning the multiplicity distributions we discuss in detail the phenomenon of the oscillatory behavior of the modified combinants apparently observed in experimental data.

RAPIDITY DISTRIBUTION AND DUALITY OF A PHASE-SPACE BRANCHING MODEL FOR MULTIPARTICLE PRODUCTION

1986 ◽  
Vol 01 (04) ◽  
pp. 303-320 ◽  
Author(s):  
RUDOLPH C. HWA ◽  
C.S. LAM
Keyword(s):  
Phase Space ◽  
Physical Interpretation ◽  
High Energy ◽  
Rapidity Distribution ◽  
Multiparticle Production ◽  
Production Processes ◽  
Branching Model ◽  
Starting Point

A branching model is developed for the description of multiparticle production processes at high energy. The starting point is the essential phenomenological validity of approximate KNO scaling. A quasirapidity variable is introduced, in terms of which the exclusive distribution of the produced particles can be calculated. The model is then described in the context of s- and t-channel duality. The dual picture lends itself to a physical interpretation of the model, the contrast of which from dual topological unitarization is pointed out.

scholarly journals Phase space effects on fast ion distribution function modeling in tokamaks

2016 ◽  
Vol 23 (5) ◽  
pp. 056106 ◽  
Author(s):  
M. Podestà ◽  
M. Gorelenkova ◽  
E. D. Fredrickson ◽  
N. N. Gorelenkov ◽  
R. B. White
Keyword(s):  
Distribution Function ◽  
Phase Space ◽  
Ion Distribution ◽  
Fast Ion ◽  
Space Effects

Phase space effects on single particle spectra

1972 ◽  
Vol 38 (4) ◽  
pp. 249-252 ◽  
Author(s):  
M.-S. Chen ◽  
F.E. Paige
Keyword(s):  
Phase Space ◽  
Single Particle ◽  
Particle Spectra ◽  
Space Effects
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