scholarly journals Strange Stars in the Vector Interaction Enhanced Bag Model

Particles ◽  
2019 ◽  
Vol 2 (4) ◽  
pp. 447-456 ◽  
Author(s):  
Marc Salinas ◽  
Thomas Klähn ◽  
Prashanth Jaikumar
Keyword(s):  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Parameter Space ◽  
Chiral Symmetry Breaking ◽  
Maximum Mass ◽  
Bag Model ◽  
Strange Stars ◽  
Strange Matter ◽  
Vector Interaction ◽  
The Stability

The vector interaction enhanced Bag model (vBag) for dense quark matter extends the commonly used thermodynamic Bag model (tdBag) by incorporating effects of dynamical chiral symmetry breaking (D χ SB) and vector repulsion. Motivated by the suggestion that the stability of strange matter is in tension with chiral symmetry breaking (D χ SB) we examine the parameter space for its stability in the vBag model in this work. Assuming the chiral transition occurs at sufficiently low density, we determine the stability region of strange matter as a function of the effective Bag constant and the vector coupling. As an astrophysical application, we construct contours of maximum mass M max and radius at maximum mass R max in this region of parameter space. We also study the stability of strange stars in the vBag model with maximum mass in the 2 M ⊙ range by computing the spectrum of radial oscillations, and comparing to results from the tdBag model, find some notable differences.

NEUTRAL PION PHOTOPRODUCTION ON THE PROTON AND THE CLOUDY-BAG MODEL

1992 ◽  
Vol 07 (21) ◽  
pp. 5231-5244
Author(s):  
A.N. TABACHENKO
Keyword(s):  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Electric Dipole ◽  
Neutral Pion ◽  
Chiral Symmetry Breaking ◽  
Pion Photoproduction ◽  
Additional Contribution ◽  
Bag Model ◽  
Neutral Pions ◽  
Quark Masses

In the cloudy-bag model, the value of the electric dipole amplitude of the photoproduction of neutral pions off protons at threshold connected with the additional contribution from the chiral symmetry breaking interaction is evaluated. If this additional contribution is included in the amplitude of the photoproduction of neutral pions off protons at threshold, the discrepancy between the LET predictions and the measured value of the electric dipole amplitude [Formula: see text] can be resolved for the values of quark masses and bag radii which are close to the generally used values.

scholarly journals CHIRAL SYMMETRY BREAKING AND STABILITY OF QUARK DROPLETS

2006 ◽  
Vol 15 (03) ◽  
pp. 595-615 ◽  
Author(s):  
S. YASUI ◽  
A. HOSAKA
Keyword(s):  
Boundary Condition ◽  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Chiral Symmetry Breaking ◽  
Ground States ◽  
Baryon Number ◽  
Confinement Effects ◽  
Quark Confinement ◽  
Dynamical Chiral Symmetry Breaking ◽  
The Stability

We discuss the stability of strangelets — quark droplets with strangeness — in the Nambu–Jona-Lasinio model supplemented by a boundary condition for quark confinement. Effects of dynamical chiral symmetry breaking are considered properly inside quark droplets of arbitrary baryon number. We obtain the energy per baryon number of quark droplets with baryon number from one to thousands. It is shown that strangelets are not the ground states as compared with nuclei, though they can be locally stable.

NOVEL FACETS OF THE NONABELIAN ANOMALY

1992 ◽  
Vol 07 (22) ◽  
pp. 5637-5655
Author(s):  
LAY NAM CHANG ◽  
YIGAO LIANG
Keyword(s):  
Symmetry Breaking ◽  
Gauge Group ◽  
Chiral Symmetry ◽  
Parameter Space ◽  
General Class ◽  
Chiral Symmetry Breaking ◽  
Topological Structures ◽  
Group Parameter ◽  
Anomaly Equation

We derive new constraints on multipoint amplitudes involving chiral currents. These constraints are valid for arbitrary values of the momenta of the currents, and for arbitrary chiral symmetry-breaking schemes. Examples of how these constraints are realized for several symmetry-breaking patterns are given, and relations to the Wess—Zumino action are discussed. The constraints are shown to result from the presence of nonAbelian phases on surfaces in gauge group parameter space. They represent subtler manifestations of a general class of topological structures, the simplest of which gives rise to the nonAbelian anomaly equation by the Abelian phase winding.

scholarly journals A Possible Resolution to Troubles of SU(2) Center Vortex Detection in Smooth Lattice Configurations

Universe ◽  
2021 ◽  
Vol 7 (5) ◽  
pp. 122
Author(s):  
Rudolf Golubich ◽  
Manfried Faber
Keyword(s):  
Symmetry Breaking ◽  
Quantum Chromodynamics ◽  
Chiral Symmetry ◽  
Chiral Symmetry Breaking ◽  
Vortex Model ◽  
Center Vortex ◽  
Vortex Detection

The center vortex model of quantum-chromodynamics can explain confinement and chiral symmetry breaking. We present a possible resolution for problems of the vortex detection in smooth configurations and discuss improvements for the detection of center vortices.

scholarly journals Spontaneous chiral symmetry breaking in the massive Landau gauge: Realistic running coupling

2021 ◽  
Vol 103 (9) ◽  
Author(s):  
Marcela Peláez ◽  
Urko Reinosa ◽  
Julien Serreau ◽  
Matthieu Tissier ◽  
Nicolás Wschebor
Keyword(s):  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Chiral Symmetry Breaking ◽  
Landau Gauge ◽  
Spontaneous Chiral Symmetry Breaking ◽  
Running Coupling

1D Mn(III) Coordination Polymers Exhibiting Chiral Symmetry Breaking and Weak Ferromagnetism

2021 ◽  
Author(s):  
Aoi Hara ◽  
Sotaro Kusumoto ◽  
Yoshihiro Sekine ◽  
Jack Harrowfield ◽  
Yang Kim ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Coordination Polymers ◽  
Chiral Symmetry Breaking ◽  
Weak Ferromagnetism ◽  
Chiral Ligands ◽  
One Dimensional

Mn(III) complexes with the non-chiral ligands, (E)-N-(2-((2-aminobenzylidene)amino)-2-methylpropyl)-5-X-2-hydroxybenzamide (HLX, X = H, Cl, Br, and I), crystallise as chiral conglomerates containing amide oxygen-bridged one-dimensional coordination polymers that exhibit weak ferromagnetism. The...

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