skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Hyperon matter at low densities

Abstract

It was reported recently that hyperons can be present inside PSRJ1614-2230 compact star. This can be realized only if the strength of the ω-hyperons and φ-hyperons coupling of conventional hyperons coupling constant on the extended relativistic mean field (ERMF) model increase by a factor of 1.5 to 3. In the present work, the mass and radius relation of the neutron star that is calculated by using BSR28 parameter set of ERMF model augmented with maximal coupling strength of the ω-hyperons and φ-hyperons (X=1), is compared to the mass and radius relation of the neutron star that is predicted by the same RMF parameter set but by assuming that hyperons do not exist in the matter (No. Hyp) as well as those by assuming the hyperons coupling constant fulfilled the conventional SU(6) and SU(3) symmetry. The consequences of implementing X=1 prescription are also discussed. The potential depths of hyperons in symmetric nuclear matter (SNM), pure neutron matter (PNM) and pure lambda matter (PLM) based on this parameter set are also calculated by using the X=1, SU (6) and SU (3) prescriptions. The results are compared to those obtained from microscopic models, quark meson coupling model (χ QMM) and the QCD summore » rule for finite density (QCD SM) result.« less

Authors:
 [1]
  1. Department Fisika, FMIPA, Universitas Indonesia, Depok 16424 (Indonesia)
Publication Date:
OSTI Identifier:
22307901
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1617; Journal Issue: 1; Conference: ICTAP 2013: 3. international conference on theoretical and applied physics, Malang, East Java (Indonesia), 10-11 Oct 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COMPARATIVE EVALUATIONS; COUPLING CONSTANTS; HYPERONS; MEAN-FIELD THEORY; NEUTRON STARS; NUCLEAR MATTER; OMEGA-782 MESONS; PHI MESONS; QUANTUM CHROMODYNAMICS; QUARKS; RELATIVISTIC RANGE; SU-3 GROUPS; SU-6 GROUPS; SUM RULES

Citation Formats

Sulaksono, A., E-mail: anto.sulaksono@sci.ui.ac.id. Hyperon matter at low densities. United States: N. p., 2014. Web. doi:10.1063/1.4897125.
Sulaksono, A., E-mail: anto.sulaksono@sci.ui.ac.id. Hyperon matter at low densities. United States. https://doi.org/10.1063/1.4897125
Sulaksono, A., E-mail: anto.sulaksono@sci.ui.ac.id. 2014. "Hyperon matter at low densities". United States. https://doi.org/10.1063/1.4897125.
@article{osti_22307901,
title = {Hyperon matter at low densities},
author = {Sulaksono, A., E-mail: anto.sulaksono@sci.ui.ac.id},
abstractNote = {It was reported recently that hyperons can be present inside PSRJ1614-2230 compact star. This can be realized only if the strength of the ω-hyperons and φ-hyperons coupling of conventional hyperons coupling constant on the extended relativistic mean field (ERMF) model increase by a factor of 1.5 to 3. In the present work, the mass and radius relation of the neutron star that is calculated by using BSR28 parameter set of ERMF model augmented with maximal coupling strength of the ω-hyperons and φ-hyperons (X=1), is compared to the mass and radius relation of the neutron star that is predicted by the same RMF parameter set but by assuming that hyperons do not exist in the matter (No. Hyp) as well as those by assuming the hyperons coupling constant fulfilled the conventional SU(6) and SU(3) symmetry. The consequences of implementing X=1 prescription are also discussed. The potential depths of hyperons in symmetric nuclear matter (SNM), pure neutron matter (PNM) and pure lambda matter (PLM) based on this parameter set are also calculated by using the X=1, SU (6) and SU (3) prescriptions. The results are compared to those obtained from microscopic models, quark meson coupling model (χ QMM) and the QCD sum rule for finite density (QCD SM) result.},
doi = {10.1063/1.4897125},
url = {https://www.osti.gov/biblio/22307901}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1617,
place = {United States},
year = {Thu Sep 25 00:00:00 EDT 2014},
month = {Thu Sep 25 00:00:00 EDT 2014}
}