Rapidity dependence of multiplicity distributions and reaction mechanisms of multiparticle production processes

1987 ◽  
Vol 35 (1) ◽  
pp. 152-157 ◽  
Author(s):  
Chao Wei-qin ◽  
Meng Ta-chung ◽  
Pan Ji-cai
Keyword(s):  
Reaction Mechanisms ◽  
Multiparticle Production ◽  
Production Processes ◽  
Multiplicity Distributions ◽  
Rapidity Dependence

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.

scholarly journals The imprints of superstatistics in multiparticle production processes

Open Physics ◽  
2012 ◽  
Vol 10 (3) ◽  
Author(s):  
Grzegorz Wilk ◽  
Zbigniew Włodarczyk
Keyword(s):  
Uncertainty Relation ◽  
Sum Rules ◽  
Nucleon Nucleon ◽  
Multiparticle Production ◽  
Nuclear Collisions ◽  
Nonextensive Statistics ◽  
Production Processes ◽  
Tsallis Distribution ◽  
Power Law Distributions ◽  
Ubiquitous Presence

AbstractWe provide an update of the overview of imprints of Tsallis nonextensive statistics seen in a multiparticle production processes. They reveal an ubiquitous presence of power law distributions of different variables characterized by the nonextensivity parameter q > 1. In nuclear collisions one additionally observes a q-dependence of the multiplicity fluctuations reflecting the finiteness of the hadronizing source. We present sum rules connecting parameters q obtained from an analysis of different observables, which allows us to combine different kinds of fluctuations seen in the data and analyze an ensemble in which the energy (E), temperature (T) and multiplicity (N) can all fluctuate. This results in a generalization of the so called Lindhard’s thermodynamic uncertainty relation. Finally, based on the example of nucleus-nucleus collisions (treated as a quasi-superposition of nucleon-nucleon collisions) we demonstrate that, for the standard Tsallis entropy with degree of nonextensivity q < 1, the corresponding standard Tsallis distribution is described by q′ = 2 − q > 1.

scholarly journals Similarities in Multiparticle Production Processes in pp Collisions as Imprints of Nonextensive Statistics

Symmetry ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1339 ◽  
Author(s):  
Maciej Rybczynski ◽  
Zbigniew Wlodarczyk
Keyword(s):  
Transverse Momentum ◽  
Power Law ◽  
Charged Particles ◽  
Multiparticle Production ◽  
Common Mechanism ◽  
Power Indices ◽  
Pp Collisions ◽  
Nonextensive Statistics ◽  
Production Processes

The transverse momentum pT spectra of both hadrons and jets produced in pp collisions at beam energies from hundreds GeV to a few TeV exhibit power-law behavior of 1/pTn at high pT, with similar power indices n. The respective nonextensivity parameters for transverse momenta distributions and the global nonextensivity parameter obtained from multiplicities are compared. In particular, data on kaon to pion (charged particles) multiplicity ratio are analyzed, assuming that the reaction occurs in some nonextensive environment. The values of the corresponding nonextensivity parameters were found to be similar, strongly indicating the existence of a common mechanism behind all these observables.

TEST OF IDENTIFIED HADRON MULTIPLICITIES FOR NONEXTENSIVE STATISTICAL MODEL AT LHC ENERGIES

2014 ◽  
Vol 29 (03n04) ◽  
pp. 1450021
Author(s):  
T. WIBIG
Keyword(s):  
Transverse Momentum ◽  
Statistical Model ◽  
Multiparticle Production ◽  
Thermodynamical Parameter ◽  
Nonextensive Statistics ◽  
Hadron Multiplicity ◽  
Production Processes ◽  
Momentum Distributions ◽  
Parameter Values ◽  
Thermodynamical Model

We analyzed the identified hadron multiplicity predictions of the generalized thermodynamical model of the multiparticle production processes with nonextensive statistics. The multiplicities measured recently at LHC experiments seem to be consistent with this approach and thermodynamical parameter values are found already by analyzing transverse momentum distributions. The information about the mechanism of the strangeness suppression has been derived to some extent from multistrange hadron abundances.

SOME ANALYSIS OF HADRON–NUCLEON COLLISIONS AT HIGH ENERGY INELASTIC INTERACTIONS IN PHOTO-EMULSION

2002 ◽  
Vol 17 (26) ◽  
pp. 1693-1699
Author(s):  
S. M. ABD EL-HALIM
Keyword(s):  
Cross Sections ◽  
Nuclear Emulsion ◽  
Production Cross ◽  
High Energy ◽  
Reaction Cross ◽  
Multiparticle Production ◽  
Incident Momentum ◽  
Multiplicity Distributions ◽  
Pseudorapidity Distributions ◽  
Reaction Cross Sections

The interaction of 400 GeV/c protons and 340 GeV/c π- with nucleons in nuclear emulsion has been investigated. The interaction mean free paths (m.f.p.) and the corresponding reaction cross-sections (σ in ) have been found, the multiplicity distributions for the events with Nh = 0 (clean events) are measured and studied as well as the angular and pseudorapidity distributions. Finally the coherent multiparticle production cross-sections (σ coh ) were estimated and compared with other data, where it was found to be increasing slowly with increasing incident momentum for protons while it increases rapidly with increasing π--momentum.

Foundation for thermodynamics with large fluctuations in hadronic multiparticle production processes

1973 ◽  
Vol 8 (18) ◽  
pp. 1044-1048
Author(s):  
A. S. Fridman ◽  
V. I. Kuvshinov ◽  
A. S. Potupa ◽  
L. F. Zirkov
Keyword(s):  
Multiparticle Production ◽  
Production Processes ◽  
Large Fluctuations
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