PARAMETRIC COUPLING MODEL: RECENT ADVANCES

2010 ◽  
Vol 19 (08n10) ◽  
pp. 1463-1468
Author(s):  
G. F. MARRANGHELLO ◽  
C. PROVIDÊNCIA ◽  
A. M. S. DOS SANTOS
Keyword(s):  
Neutron Star ◽  
Nuclear Matter ◽  
Coupling Model ◽  
Heavy Ion ◽  
Small Range ◽  
Heavy Ion Collision ◽  
Asymmetric Nuclear Matter ◽  
Parametric Coupling ◽  
Free Parameters ◽  
Ion Collision

We review the properties of the parametric coupling model and analyze its results when considering neutron star observations and heavy-ion collision experiments, specially those concerning the isospin characteristics of symmetric and asymmetric nuclear matter. By the end of the analysis, we are able to constrain the free parameters to a very small range of acceptable values.

HEAVY ION CONSTRAINTS IN THE PARAMETRIC COUPLING MODEL

2010 ◽  
Vol 19 (10) ◽  
pp. 1935-1946
Author(s):  
GUILHERME F. MARRANGHELLO ◽  
CESAR A. Z. VASCONCELLOS
Keyword(s):  
Neutron Star ◽  
Neutron Stars ◽  
Nuclear Matter ◽  
Observational Data ◽  
Compression Modulus ◽  
Coupling Model ◽  
Heavy Ion ◽  
Coupling Constants ◽  
Wide Range ◽  
Parametric Coupling

The relativistic parametric coupling model is used here to describe global static properties of nuclear matter and neutron stars. Using recent observational data related to neutron star properties and experimental results of heavy-ion collisions, we review some properties of the effective model and we impose this way new constraints on its coupling constants. Then we analyze the consequences on already known parameters of nuclear matter, i.e., the compression modulus, the effective nucleon mass, and the maximum neutron star mass predicted by integrating the Tolman–Oppenheimer–Volkoff equations. To achieve this goal, we have explored the parametric coupling model in a wide range of parameters. We made use of recent data on flow analysis to constraint this parameter. Our results indicate values for the compression modulus of nuclear matter and for the maximum mass of neutron stars which are in good agreement with the observational data.

HEAVY-ION AND ASTROPHYSICS CONSTRAINTS IN THE PARAMETRIC COUPLING MODEL

2010 ◽  
Vol 19 (08n10) ◽  
pp. 1667-1672
Author(s):  
M. GROHMANN ◽  
C. A. Z. VASCONCELLOS ◽  
G. F. MARRANGHELLO ◽  
F. FERNÁNDEZ
Keyword(s):  
Neutron Star ◽  
Neutron Stars ◽  
Nuclear Matter ◽  
Observational Data ◽  
Compression Modulus ◽  
Coupling Model ◽  
Heavy Ion ◽  
Coupling Constants ◽  
Wide Range ◽  
Parametric Coupling

The relativistic parametric coupling model is used here to describe global static properties of nuclear matter and neutron stars. Using recent observational data related to neutron star properties and experimental results of heavy-ion collisions, we review some properties of the effective model and we impose this way new constraints on its coupling constants. Then we analyze the consequences on already known parameters of nuclear matter, i.e., the compression modulus, the effective nucleon mass and the maximum neutron star mass predicted by integrating the Tolman–Oppenheimer–Volkoff equations. We make use of recent data on flow analysis to constrain the parameters of the theory and to achieve this goal, and have explored the parametric coupling model in a wide range of parameters. Our predictions for the compression modulus of nuclear matter and for the maximum mass of neutron stars are in good agreement with the observational data.

Collision geometry and particle production in high energy heavy ion collision experiments

2008 ◽  
Vol 32 (4) ◽  
pp. 308-328
Author(s):  
Wang Ya-Ping ◽  
Zhou Dai-Mei ◽  
Huang Rui-Dian ◽  
Cai Xu
Keyword(s):  
Particle Production ◽  
Heavy Ion ◽  
High Energy ◽  
Heavy Ion Collision ◽  
Ion Collision

Dynamical model for neck formation in the entrance channel of a heavy ion collision

1982 ◽  
Vol 306 (4) ◽  
pp. 307-313 ◽  
Author(s):  
S. K. Samaddar ◽  
B. C. Samanta ◽  
D. Sperber ◽  
M. Zielińska-Pfabé
Keyword(s):  
Heavy Ion ◽  
Entrance Channel ◽  
Dynamical Model ◽  
Heavy Ion Collision ◽  
Neck Formation ◽  
Ion Collision

Study and Investigation of Hard Photons Emission in Heavy Ion Collisions

2021 ◽  
Vol 19 (2) ◽  
pp. 61-65
Author(s):  
Taghreed A. Younis ◽  
Hadi J.M. Al-Agealy
Keyword(s):  
Critical Temperature ◽  
Quark Gluon Plasma ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Heavy Ion Collision ◽  
Hard Photon ◽  
Ion Collisions ◽  
Strength Models ◽  
Ion Collision

This work involves hard photon rate production from quark -gluon plasma QGP interaction in heavy ion collision. Using a quantum chromodynamic model to investigate and calculation of photons rate in 𝑐𝑔 → 𝑠𝑔𝛾 system due to strength coupling, photons rate, temperature of system, flavor number and critical. The photons rate production computed using the perturbative strength models for QGP interactions. The strength coupling was function of temperature of system, flavor number and critical temperature. Its influenced by force with temperature of system, its increased with decreased the temperature and vice versa. The strength coupling has used to examine the confinement and deconfinement of quarks in QGP properties and influence on the photon rate production. In our approach, we calculate the photons rate depending on the strength coupling, photons rate and temperature of system with other factors. The results plotted as a function of the photons energy. The photons rate was decreased with increased temperature and increased with decreased with strength coupling.

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