Pion production in relativistic nucleus–nucleus collisions

2011 ◽  
Vol 89 (3) ◽  
pp. 261-269 ◽  
Author(s):  
A. Abdelsalam ◽  
M. S. El–Nagdy ◽  
B. M. Badawy
Keyword(s):  
Experimental Study ◽  
Nuclear Matter ◽  
Pion Production ◽  
Particle Production ◽  
Relativistic Nucleus ◽  
Pion Emission ◽  
Particle Spectra ◽  
Multiplicity Distributions

An experimental study on the production of pions is reviewed, covering pion spectra and multiplicity distributions. Emphasis is placed on progress in characterizing the conditions of nuclear matter by employing particle production observables. Further, the information derived from the Hagedorn temperature of the system emitting pions is critically examined, along with a discussion of the sources responsible for pion emission in the reaction, as revealed by particle spectra and yields.

Experimental Study of Double-Charged Pion Production in (π−,p) Collisions at 900 MeV

1963 ◽  
Vol 130 (1) ◽  
pp. 357-361 ◽  
Author(s):  
Derek C. Colley ◽  
Joseph T. Ratau
Keyword(s):  
Experimental Study ◽  
Pion Production ◽  
Charged Pion

Experimental study of single-pion production in charged-current neutrino interactions

1979 ◽  
Vol 24 (15) ◽  
pp. 540-544 ◽  
Author(s):  
M. Pohl ◽  
M. Dewit ◽  
C. Vander Velde-Wilquet ◽  
P. Vilain ◽  
D. Haidt ◽  
...  
Keyword(s):  
Experimental Study ◽  
Pion Production ◽  
Charged Current ◽  
Neutrino Interactions

scholarly journals Experimental study of exclusive one-pion production in all neutrino-induced neutral current channels

1978 ◽  
Vol 135 (1) ◽  
pp. 45-65 ◽  
Author(s):  
W. Krenz ◽  
W. Lerche ◽  
J. Morfin ◽  
M. Pohl ◽  
G. Bertrand-Coremans ◽  
...  
Keyword(s):  
Experimental Study ◽  
Pion Production ◽  
Neutral Current

scholarly journals Adiabatic expansion of nuclear matter gas to describe violation of Feynman scaling law in multiple particle production

2019 ◽  
Vol 208 ◽  
pp. 11006 ◽  
Author(s):  
Akinori Ohsawa ◽  
Edison H. Shibuya ◽  
Masanobu Tamada
Keyword(s):  
Nuclear Matter ◽  
Particle Production ◽  
Scaling Law ◽  
Boltzmann Distribution ◽  
Adiabatic Expansion ◽  
Forward Region ◽  
Final State ◽  
Rapidity Density ◽  
Multiple Particle Production ◽  
Multiple Particle

The main features of the rapidity density distribution of the produced hadrons in multiple particle production in nucleon collisions are; (a) the distribution in the forward region (ȳ ≥ 0) has a shape similar to the Fermi distribution, (b) the distribution in the most forward region reaches almost the maximum rapidity ymax = ln(√s/M) (M : nucleon mass), and (c) the shrinkage of the distribution from the maximum rapidity increases with the incident energy (i.e. violation of Feynman scaling law). These features are possible to be described by the assumptions that; (1) a fireball of the gas (made of nuclear matter, with the temperature Ti and with the shape of the incident nucleon with Lorentz contraction) is produced in the collision, (2) the fireball makes the adiabatic expansion, and (3) the constituent particles of the gas obey the Maxwell-Boltzmann distribution of the temperature Tf in the final state.

scholarly journals Entropy and Multifractality in Relativistic Ion-Ion Collisions

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Shaista Khan ◽  
Shakeel Ahmad
Keyword(s):  
Information Entropy ◽  
Particle Production ◽  
Monte Carlo Model ◽  
Theoretical Models ◽  
Ion Collisions ◽  
Full Phase Space ◽  
Wide Range ◽  
Multiplicity Distributions ◽  
Generalized Dimensions ◽  
Multiparticle Systems

Entropy production in multiparticle systems is investigated by analyzing the experimental data on ion-ion collisions at AGS and SPS energies and comparing the findings with those reported earlier for hadron-hadron, hadron-nucleus, and nucleus-nucleus collisions. It is observed that the entropy produced in limited and full phase space, when normalized to maximum rapidity, exhibits a kind of scaling which is nicely supported by Monte Carlo model HIJING. Using Rényi’s order q information entropy, multifractal characteristics of particle production are examined in terms of generalized dimensions, Dq. Nearly the same values of multifractal specific heat, c, observed in hadronic and ion-ion collisions over a wide range of incident energies suggest that the quantity c might be used as a universal characteristic of multiparticle production in hadron-hadron, hadron-nucleus, and nucleus-nucleus collisions. The analysis is extended to the study of spectrum of scaling indices. The findings reveal that Rényi’s order q information entropy could be another way to investigate the fluctuations in multiplicity distributions in terms of spectral function f(α), which has been argued to be a convenient function for comparison sake not only among different experiments but also between the data and theoretical models.

scholarly journals THE IMPACT OF KAON POLARIZATION IN NUCLEAR MATTER ON THE K− PRODUCTION IN HEAVY-ION COLLISIONS

1996 ◽  
Vol 05 (02) ◽  
pp. 313-328 ◽  
Author(s):  
E.E. KOLOMEITSEV ◽  
D.N. VOSKRESENSKY ◽  
B. KÄMPFER
Keyword(s):  
Nuclear Matter ◽  
Cross Sections ◽  
Heavy Ion Collisions ◽  
Particle Production ◽  
Heavy Ion ◽  
Strange Particle ◽  
Intermediate Energy ◽  
Medium Effects ◽  
Ion Collisions ◽  
The Impact

The impact of the kaon polarization in nuclear matter on the K− yield in intermediate-energy heavy-ion collisions is investigated. Our scenario of the strange particle production and dynamics is based on an expanding fireball model. This allows for a proper account of in-medium effects. A relation between observed K+ and K− yields is derived. Differential K− cross-sections are calculated and compared with available experimental data taken at various collision energies. It turns out that in-medium effects can modify the K− yields by factors 2 to 5 at beam energies between 2 and 1 AGeV.

THE (π,2π) INTERACTION AND THE π-π INTERACTION INSIDE NUCLEAR MATTER

2005 ◽  
Vol 20 (02n03) ◽  
pp. 263-272
Author(s):  
PAOLO CAMERINI
Keyword(s):  
Nuclear Matter ◽  
Cross Sections ◽  
Differential Cross ◽  
Pion Production ◽  
Experimental Results ◽  
Differential Cross Sections ◽  
General Properties ◽  
Intermediate Energies

The results of an extensive campaign of measurements of the π→ππ process in the nucleon and nuclei at intermediate energies are presented. Several differential cross-sections were measured following the detection of multiparticle (π+,π+π±) and (π+,π+π-p) events, which allowed to understand the general properties of the pion production reaction inside the nucleus. Particular attention was devoted to the study of the effects of nuclear matter on the π-π scalar-isoscalar system. The most relevant results are reviewed and compared to theories as well as to other recent experimental results.

scholarly journals Small collision systems: Theory overview on cold nuclear matter effects

2018 ◽  
Vol 171 ◽  
pp. 11001
Author(s):  
Néstor Armesto
Keyword(s):  
Nuclear Matter ◽  
Particle Production ◽  
Hadron Collider ◽  
Heavy Ion ◽  
Smooth Transition ◽  
Relativistic Heavy Ion Collider ◽  
Cold Nuclear Matter ◽  
Proton Proton ◽  
Small Systems ◽  
Matter Effects

Many observables measured at the Relativistic Heavy Ion Collider and the Large Hadron Collider show a smooth transition between proton-proton and protonnucleus collisions (small systems), and nucleus-nucleus collisions (large systems), when represented versus some variable like the multiplicity in the event. In this contribution I review some of the physics mechanisms, named cold nuclear matter effects, that may lead to a collective-like behaviour in small systems beyond the macroscopic description provided by relativistic hydrodynamics. I focus on the nuclear modification of parton densities, single inclusive particle production and correlations.

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