scholarly journals STRANGENESS PRODUCTION AT FINITE TEMPERATURE AND BARYON DENSITY IN AN EFFECTIVE RELATIVISTIC MEAN FIELD MODEL

2012 ◽  
Vol 21 (03) ◽  
pp. 1250028
Author(s):  
F. IAZZI ◽  
R. INTROZZI ◽  
A. LAVAGNO ◽  
D. PIGATO ◽  
M. H. YOUNIS
Keyword(s):  
Field Model ◽  
Chemical Potential ◽  
Mean Field ◽  
Baryon Density ◽  
Strangeness Production ◽  
Coupling Scheme ◽  
Mean Field Model ◽  
Relativistic Mean Field ◽  
Kaon Condensation ◽  
Wide Range

We study the strangeness production in hot and dense nuclear medium, by requiring the conservation of the baryon density, electric charge fraction and zero net strangeness. The hadronic equation of state is investigated by means of an effective relativistic mean field model, with the inclusion of the full octet of baryons and kaon mesons. Kaons are considered taking into account of an effective chemical potential depending on the self-consistent interaction between baryons. The obtained results are compared with a minimal coupling scheme, calculated for different values of the anti-kaon optical potential and with noninteracting kaon particles. In this context, we also consider the possible onset of the kaon condensation for a wide range of temperatures and baryon densities.

MESON PRODUCTION IN AN EFFECTIVE RELATIVISTIC MEAN FIELD MODEL

2011 ◽  
Vol 26 (03n04) ◽  
pp. 671-672
Author(s):  
F. IAZZI ◽  
A. LAVAGNO ◽  
K. SZYMAńSKA
Keyword(s):  
Degrees Of Freedom ◽  
Field Model ◽  
Chemical Potential ◽  
Mean Field ◽  
Meson Production ◽  
Baryon Number ◽  
High Energy ◽  
Central Nucleus ◽  
Mean Field Model ◽  
Relativistic Mean Field

We study the meson yield ratios for high energy central nucleus-nucleus collisions by means of an effective relativistic mean-field model with the inclusion of the full octet of baryons, the Δ-isobars degrees of freedom and the lightest pseudoscalar and vector mesons. These last particles are considered in the so-called one-body contribution, taking into account of an effective chemical potential depending on the self-consistent interaction between baryons. The analysis is performed by requiring the global conservation of baryon number, electric charge fraction and zero net strangeness.

EVOLUTION OF SHELL STRUCTURE IN NUCLEI

2011 ◽  
Vol 20 (08) ◽  
pp. 1663-1675 ◽  
Author(s):  
A. BHAGWAT ◽  
Y. K. GAMBHIR
Keyword(s):  
Shell Structure ◽  
Crucial Role ◽  
Field Model ◽  
Mean Field ◽  
Mass Region ◽  
The Other ◽  
Mean Field Model ◽  
Relativistic Mean Field ◽  
Shell Closures ◽  
Low Mass

Systematic investigations of the pairing and two-neutron separation energies which play a crucial role in the evolution of shell structure in nuclei, are carried out within the framework of relativistic mean-field model. The shell closures are found to be robust, as expected, up to the lead region. New shell closures appear in low mass region. In the superheavy region, on the other hand, it is found that the shell closures are not as robust, and they depend on the particular combinations of neutron and proton numbers. Effect of deformation on the shell structure is found to be marginal.

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