scholarly journals Relativistic mean-field approach in nuclear systems

2020 ◽  
Vol 101 (3) ◽  
Author(s):  
Xiaodong Sun ◽  
Ruirui Xu ◽  
Yuan Tian ◽  
Zhongyu Ma ◽  
Zhi Zhang ◽  
...  
Keyword(s):  
Mean Field ◽  
Field Approach ◽  
Relativistic Mean Field ◽  
Nuclear Systems

THE INNER CRUST OF NEUTRON STARS IN RELATIVISTIC MEAN FIELD APPROACH

2008 ◽  
Vol 17 (09) ◽  
pp. 1765-1773 ◽  
Author(s):  
JIGUANG CAO ◽  
ZHONGYU MA ◽  
NGUYEN VAN GIAI
Keyword(s):  
Boundary Conditions ◽  
Neutron Stars ◽  
Mean Field ◽  
Bcs Theory ◽  
Neutron Density ◽  
Field Approach ◽  
Hartree Fock ◽  
Relativistic Mean Field ◽  
Density Distributions ◽  
Rmf Model

The microscopic properties and superfluidity of the inner crust in neutron stars are investigated in the framework of the relativistic mean field(RMF) model and BCS theory. The Wigner-Seitz(W-S) cell of inner crust is composed of neutron-rich nuclei immersed in a sea of dilute, homogeneous neutron gas. The pairing properties of nucleons in the W-S cells are treated in BCS theory with Gogny interaction. In this work, we emphasize on the choice of the boundary conditions in the RMF approach and superfluidity of the inner crust. Three kinds of boundary conditions are suggested. The properties of the W-S cells with the three kinds of boundary conditions are investigated. The neutron density distributions in the RMF and Hartree-Fock-Bogoliubov(HFB) models are compared.

Relativistic mean-field approach for Λ,Ξ , and Σ hypernuclei

2018 ◽  
Vol 98 (2) ◽  
Author(s):  
Z.-X. Liu ◽  
C.-J. Xia ◽  
W.-L. Lu ◽  
Y.-X. Li ◽  
J. N. Hu ◽  
...  
Keyword(s):  
Mean Field ◽  
Field Approach ◽  
Relativistic Mean Field

scholarly journals ENDPOINT OF rp PROCESS USING RELATIVISTIC MEAN FIELD APPROACH AND A NEW MASS FORMULA

2012 ◽  
Vol 21 (08) ◽  
pp. 1250074 ◽  
Author(s):  
CHIRASHREE LAHIRI ◽  
G. GANGOPADHYAY
Keyword(s):  
Mass Formula ◽  
Optical Potential ◽  
Mean Field ◽  
Proton Capture ◽  
Density Profiles ◽  
X Ray ◽  
Field Approach ◽  
Relativistic Mean Field ◽  
Rapid Proton ◽  
Rp Process

Densities from relativistic mean field calculations are applied to construct the optical potential and, hence calculate the endpoint of the rapid proton capture (rp) process. Mass values are taken from a new phenomenological mass formula. Endpoints are calculated for different temperature-density profiles of various X-ray bursters. We find that the rp process can produce significant quantities of nuclei upto around mass 95. Our results differ from existing works to some extent.

Dimensional effects in a relativistic mean-field approach

1998 ◽  
Vol 57 (2) ◽  
pp. 857-865 ◽  
Author(s):  
A. Delfino ◽  
Lizardo H. C. M. Nunes ◽  
J. S. Sá Martins
Keyword(s):  
Mean Field ◽  
Field Approach ◽  
Relativistic Mean Field ◽  
Dimensional Effects

scholarly journals Constraints on Microscopic and Phenomenological Equations of State of Dense Matter from GW170817

Universe ◽  
2019 ◽  
Vol 5 (10) ◽  
pp. 204 ◽  
Author(s):  
Domenico Logoteta ◽  
Ignazio Bombaci
Keyword(s):  
Neutron Star ◽  
Neutron Stars ◽  
Equations Of State ◽  
Mean Field ◽  
Dense Matter ◽  
Neutron Star Matter ◽  
Field Approach ◽  
Relativistic Mean Field ◽  
Three Body ◽  
Good Agreement

We discuss the constraints on the equation of state (EOS) of neutron star matter obtained by the data analysis of the neutron star-neutron star merger in the event GW170807. To this scope, we consider two recent microscopic EOS models computed starting from two-body and three-body nuclear interactions derived using chiral perturbation theory. For comparison, we also use three representative phenomenological EOS models derived within the relativistic mean field approach. For each model, we determine the β -stable EOS and then the corresponding neutron star structure by solving the equations of hydrostatic equilibrium in general relativity. In addition, we calculate the tidal deformability parameters for the two neutron stars and discuss the results of our calculations in connection with the constraints obtained from the gravitational wave signal in GW170817. We find that the tidal deformabilities and radii for the binary’s component neutron stars in GW170817, calculated using a recent microscopic EOS model proposed by the present authors, are in very good agreement with those derived by gravitational waves data.

VACUUM: MATTER AND ANTIMATTER

2004 ◽  
Vol 13 (07) ◽  
pp. 1531-1538
Author(s):  
WALTER GREINER ◽  
THOMAS J. BÜRVENICH
Keyword(s):  
Field Model ◽  
Mean Field ◽  
Life Time ◽  
Mean Field Model ◽  
Relativistic Mean Field ◽  
Self Consistent ◽  
Nuclear Systems ◽  
Nuclear Environment

In this manuscript we first present the vacuum for the e+-e- field of QED and show how it is modified for baryons in nuclear environment. Then we discuss the possibility of producing new types of nuclear systems by implanting an antibaryon into ordinary nuclei. The structure of nuclei containing one antiproton or antilambda is investigated within the framework of a relativistic mean-field model. Self-consistent calculations predict an enhanced binding and considerable compression in such systems as compared with normal nuclei. We present arguments that the life time of such nuclei with respect to the antibaryon annihilation might be long enough for their observation.

scholarly journals Neutron halos in heavy nuclei-relativistic mean field approach

1997 ◽  
Vol 357 (1) ◽  
pp. 33-38 ◽  
Author(s):  
Andrzej Baran ◽  
Krzysztof Pomorski ◽  
Michał Warda
Keyword(s):  
Mean Field ◽  
Heavy Nuclei ◽  
Field Approach ◽  
Relativistic Mean Field
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