Modified Heisenberg's Approach for the Mean Charged Hadron Multiplicity in High Energy Collisions

1978 ◽  
Vol 33 (4) ◽  
pp. 493-497
Author(s):  
D. C. Ghosh ◽  
I. K. Daftari ◽  
D. K. Bhattacharjee ◽  
S. C. Naha ◽  
A. Roy Chowdhury ◽  
...  
Keyword(s):  
Energy Range ◽  
High Energy ◽  
Charged Hadron ◽  
Entire Energy Range ◽  
Hadron Multiplicity ◽  
Entire Energy ◽  
High Energy Collisions ◽  
The Mean ◽  
Hadronic Collisions ◽  
Remarkable Agreement

The semiempirical formulation of Ghosh et al. for the energy dependence of multiplicity in hadronic collisions has been applied to account for the experimental multiplicity data of π±p and K±p collisions. A remarkable agreement has been found over the entire energy range.

Mean charged hadron multiplicities in high energy collisions — a new approach

1979 ◽  
Vol 57 (8) ◽  
pp. 1131-1135
Author(s):  
D. C. Ghosh ◽  
S. C. Naha ◽  
T. Roy
Keyword(s):  
Experimental Data ◽  
Energy Region ◽  
High Energy ◽  
Charged Hadron ◽  
New Approach ◽  
Entire Energy ◽  
High Energy Collisions ◽  
Region 10 ◽  
Semi Empirical ◽  
Remarkable Agreement

A semi-empirical formulation for the energy dependence of multiplicity in p–p collision has been proposed. It has been found that experimental data for the multiplicity show a remarkable agreement with this formulation in the entire energy region 10 GeV to 106 GeV.

scholarly journals Charged Hadron Multiplicity Distribution at Relativistic Heavy-Ion Colliders

2013 ◽  
Vol 2013 ◽  
pp. 1-27 ◽  
Author(s):  
Ashwini Kumar ◽  
P. K. Srivastava ◽  
B. K. Singh ◽  
C. P. Singh
Keyword(s):  
Particle Production ◽  
Center Of Mass ◽  
Quantitative Description ◽  
Heavy Ion ◽  
High Energy ◽  
Charged Hadron ◽  
Theoretical Concepts ◽  
Ion Collisions ◽  
Hadron Multiplicity ◽  
High Energy Collisions

The present paper reviews facts and problems concerning charge hadron production in high energy collisions. Main emphasis is laid on the qualitative and quantitative description of general characteristics and properties observed for charged hadrons produced in such high energy collisions. Various features of available experimental data, for example, the variations of charged hadron multiplicity and pseudorapidity density with the mass number of colliding nuclei, center-of-mass energies, and the collision centrality obtained from heavy-ion collider experiments, are interpreted in the context of various theoretical concepts and their implications. Finally, several important scaling features observed in the measurements mainly at RHIC and LHC experiments are highlighted in the view of these models to draw some insight regarding the particle production mechanism in heavy-ion collisions.

Merging beams study of ionization of positive ions by electrons

1972 ◽  
Vol 327 (1570) ◽  
pp. 317-328 ◽  
Keyword(s):  
Experimental Data ◽  
Energy Range ◽  
Cross Sections ◽  
Atomic Nitrogen ◽  
Efficiency Curve ◽  
Entire Energy Range ◽  
Positive Ions ◽  
Entire Energy ◽  
Product Ions ◽  
Scaling Rule

The technique of beam superposition is employed in the experimental study of ionization of He+, N+ and 0+ by electrons. The electron energy range extends up to 300 eV. The primary and product ions are mass selected. Relative cross-sections for ionization are obtained as a function of the laboratory energy of the electrons. The experimental data for He+ and N+ are quite consistent with published values of the absolute cross-sections for these systems. By using Thomson’s classical scaling rule for isoelectronic systems, the cross-sections for ionization of O+ are calculated from those for ionization of atomic nitrogen. These values, when normalized to the relative ionization efficiency curve obtained experimentally here, show close overlap over the entire energy range.

scholarly journals Interpretation of Cosmic Ray Composition: the Pathlength Distribution

1981 ◽  
Vol 94 ◽  
pp. 107-108
Author(s):  
R. J. Protheroe ◽  
J. F. Ormes
Keyword(s):  
Chemical Composition ◽  
Interstellar Medium ◽  
Energy Range ◽  
Cross Sections ◽  
Cosmic Ray ◽  
Forthcoming Paper ◽  
Ionization Loss ◽  
Entire Energy Range ◽  
Entire Energy ◽  
Energy Dependent

The chemical composition of cosmic ray nuclei with 3≤Z≤28 between ~100 MeV/nuc and a few hundred GeV/nuc are compared with a consistent set of propagation calculations. These include the effects of spallation (energy-dependent cross sections are used), escape and ionization loss in the interstellar medium and deceleration in the solar cavity. This has enabled a consistent study of the cosmic ray pathlength distribution to be made over this entire energy range. Details of the propagation calculation are left to a forthcoming paper.

VALIDITY OF NAKAMURA–KUDO SCALING OF CHARGED PARTICLE PSEUDORAPIDITY DISTRIBUTION IN RELATIVISTIC HIGH-ENERGY h–A INTERACTIONS

2010 ◽  
Vol 19 (10) ◽  
pp. 2045-2049 ◽  
Author(s):  
DIPAK GHOSH ◽  
ARGHA DEB ◽  
SITARAM PAL ◽  
RUPA DAS ◽  
MADHUMITA BANERJEE LAHIRI
Keyword(s):  
Charged Particle ◽  
Opportunity To Learn ◽  
High Energy ◽  
Interaction Data ◽  
Nucleus Interaction ◽  
Hadron Interaction ◽  
Space Time Structure ◽  
200 Gev ◽  
The Mean ◽  
Remarkable Agreement

Nakamura and Kudo proposed a scaling form for charged particle pseudorapidity distributions on the basis of scaling in the mean hypothesis. This scaling form was tested primarily for hadron–hadron interaction data. But no attempt was made to verify this for hadron–nucleus interaction which offers unique opportunity to learn about the space–time structure of a strongly interacting process. In view of this we report an analysis of p–AgBr interaction data at 400 GeV/c and 200 GeV/c, π-–AgBr interaction data at 200 GeV/c and 350 GeV/c to test its (Nakamura–Kudo scaling) validity in hadron–nucleus interaction. In all cases the data show a remarkable agreement with the scaling behavior of Nakamura and Kudo.

Measurement of the VEPP-4M Collider Energy Spread in the Entire Energy Range

2020 ◽  
Vol 17 (3) ◽  
pp. 332-342
Author(s):  
V. M. Borin ◽  
V. L. Dorokhov ◽  
O. I. Meshkov ◽  
Ma Xiao Chao
Keyword(s):  
Energy Range ◽  
Energy Spread ◽  
Collider Energy ◽  
Entire Energy Range ◽  
Entire Energy

scholarly journals Radial Flow in a Multiphase Transport Model at FAIR Energies

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Soumya Sarkar ◽  
Provash Mali ◽  
Somnath Ghosh ◽  
Amitabha Mukhopadhyay
Keyword(s):  
Transport Model ◽  
Hadron Collider ◽  
Heavy Ion ◽  
High Energy ◽  
Charged Hadron ◽  
Radial Expansion ◽  
Relativistic Heavy Ion Collider ◽  
Multiphase Transport ◽  
Hadron Multiplicity ◽  
Free Environment

Azimuthal distributions of radial velocities of charged hadrons produced in nucleus-nucleus (AB) collisions are compared with the corresponding azimuthal distribution of charged hadron multiplicity in the framework of a multiphase transport (AMPT) model at two different collision energies. The mean radial velocity seems to be a good probe for studying radial expansion. While the anisotropic parts of the distributions indicate a kind of collective nature in the radial expansion of the intermediate “fireball,” their isotropic parts characterize a thermal motion. The present investigation is carried out keeping the upcoming Compressed Baryonic Matter (CBM) experiment to be held at the Facility for Antiproton and Ion Research (FAIR) in mind. As far as high-energy heavy-ion interactions are concerned, CBM will supplement the Relativistic Heavy-Ion Collider (RHIC) and Large Hadron Collider (LHC) experiments. In this context our simulation results at high baryochemical potential would be interesting, when scrutinized from the perspective of an almost baryon-free environment achieved at RHIC and LHC.

scholarly journals THE INTERNAL STRUCTURE OF JETS AT COLLIDERS: LIGHT AND HEAVY QUARK INCLUSIVE HADRONIC DISTRIBUTIONS

2011 ◽  
Vol 20 (07) ◽  
pp. 1616-1622
Author(s):  
REDAMY PEREZ-RAMOS
Keyword(s):  
Transverse Momentum ◽  
Heavy Quark ◽  
Momentum Distribution ◽  
Evolution Equations ◽  
Light Quark ◽  
High Energy ◽  
Charged Hadron ◽  
Transverse Momentum Distribution ◽  
Average Multiplicity ◽  
High Energy Collisions

In this paper, we report our results on charged hadron multiplicities of heavy quark initiated jets produced in high energy collisions. After implementing the so-called dead cone effect in QCD evolution equations, we find that the average multiplicity decreases significantly as compared to the massless case. Finally, we discuss the transverse momentum distribution of light quark initiated jets and emphasize the comparison between our predictions and CDF data.

Some Analytical Results of Bunching Parameters for Multiplicity Fluctuations in High Energy Collisions

1997 ◽  
Vol 12 (38) ◽  
pp. 2975-2984 ◽  
Author(s):  
Ding-Wei Huang
Keyword(s):  
Experimental Data ◽  
Phase Space ◽  
Short Range ◽  
High Energy ◽  
Short Range Correlation ◽  
Hadron Multiplicity ◽  
Analytical Results ◽  
Range Correlation ◽  
Parameters Analysis ◽  
High Energy Collisions

A few analytical results are presented for the bunching parameters analysis applied to study the fluctuations of hadron multiplicity density in high energy collisions. The behaviors of bunching parameters are analyzed in the cases of concatenate and partitioning fluctuations. The effect of pairing in partition is also studied. As the phase-space decreases, the concatenation can be observed as the divergence of one of the bunching parameters, which also implies a strong short range correlation. In the case of a weak short range correlation, both types of binomial partitions lead to saturation for all the bunching parameters. As the phase-space increases, the effects of pair production can be observed as the oscillatory bunching parameters ηq — a function of order q. The characteristics of the observed features are discussed. Comparisons to experimental data are also presented.

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