scholarly journals Influence of the nuclear symmetry energy slope on observables of compact stars with Δ -admixed hypernuclear matter

2022 ◽  
Vol 105 (1) ◽  
Author(s):  
Vivek Baruah Thapa ◽  
Monika Sinha
Keyword(s):  
Symmetry Energy ◽  
Compact Stars ◽  
Nuclear Symmetry Energy

scholarly journals FLAVOR SYMMETRY AND TOPOLOGY CHANGE IN NUCLEAR SYMMETRY ENERGY FOR COMPACT STARS

2013 ◽  
Vol 22 (03) ◽  
pp. 1330005 ◽  
Author(s):  
HYUN KYU LEE ◽  
MANNQUE RHO
Keyword(s):  
Symmetry Energy ◽  
Compact Star ◽  
Conformal Symmetry ◽  
Compact Stars ◽  
Stellar Structure ◽  
Mass Star ◽  
Nuclear Symmetry Energy ◽  
Baryonic Matter ◽  
Topology Change ◽  
Kaon Condensation

The nuclear symmetry energy figures crucially in the structure of asymmetric nuclei and, more importantly, in the equation of state (EoS) of compact stars. At present it is almost totally unknown, both experimentally and theoretically, in the density regime appropriate for the interior of neutron stars. Basing on a strong-coupled structure of dense baryonic matter encoded in the skyrmion crystal approach with a topology change and resorting to the notion of generalized hidden local symmetry in hadronic interactions, we address a variety of hitherto unexplored issues of nuclear interactions associated with the symmetry energy, i.e., kaon condensation and hyperons, possible topology change in dense matter, nuclear tensor forces, conformal symmetry, chiral symmetry, etc., in the EoS of dense compact-star matter. One of the surprising results coming from HLS structure that is distinct from what is given by standard phenomenological approaches is that at high density, baryonic matter is driven by renormalization group flow to the "dilaton-limit fixed point" constrained by "mended symmetries". We further propose how to formulate kaon condensation and hyperons in compact-star matter in a framework anchored on a single effective Lagrangian by treating hyperons as the Callan–Klebanov kaon-skyrmion bound states simulated on crystal lattice. This formulation suggests that hyperons can figure in the stellar matter — if at all — when or after kaons condense, in contrast to the standard phenomenological approaches where the hyperons appear as the first strangeness degree of freedom in matter, thereby suppressing or delaying kaon condensation. In our simplified description of the stellar structure in terms of symmetry energies, which is compatible with that of the 1.97 solar mass star, kaon condensation plays a role of "doorway state" to strange quark matter.

The nuclear symmetry energy in relativistic Brueckner-Hartree-Fock calculations

1987 ◽  
Vol 199 (4) ◽  
pp. 469-474 ◽  
Author(s):  
H. Müther ◽  
M. Prakash ◽  
T.L. Ainsworth
Keyword(s):  
Symmetry Energy ◽  
Nuclear Symmetry Energy ◽  
Hartree Fock

scholarly journals Nuclear Symmetry Energy: constraints from Giant Quadrupole Resonances and Parity Violating Electron Scattering

2014 ◽  
Vol 66 ◽  
pp. 02092
Author(s):  
X. Roca-Maza ◽  
B. K. Agrawal ◽  
P. F. Bortignon ◽  
M. Brenna ◽  
Li-Gang Cao ◽  
...  
Keyword(s):  
Electron Scattering ◽  
Symmetry Energy ◽  
Nuclear Symmetry Energy ◽  
Energy Constraints
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