scholarly journals Third family of compact stars within a nonlocal chiral quark model equation of state

2019 ◽  
Vol 99 (6) ◽  
Author(s):  
D. E. Alvarez-Castillo ◽  
D. B. Blaschke ◽  
A. G. Grunfeld ◽  
V. P. Pagura
Keyword(s):  
Equation Of State ◽  
Quark Model ◽  
Model Equation ◽  
Compact Stars ◽  
Chiral Quark Model

EQUATION OF STATE FOR HYBRID COMPACT STARS WITH A NONLOCAL CHIRAL QUARK MODEL

2007 ◽  
Vol 16 (09) ◽  
pp. 2842-2846 ◽  
Author(s):  
A. G. GRUNFELD ◽  
J. BERDERMANN ◽  
D. B. BLASCHKE ◽  
T. KLÄHN ◽  
D. GÓMEZ DUMM ◽  
...  
Keyword(s):  
Quark Model ◽  
Compact Star ◽  
Compact Stars ◽  
Hadronic Matter ◽  
Observational Constraints ◽  
Chiral Quark Model ◽  
Color Charge ◽  
Hybrid Star ◽  
Hartree Fock ◽  
Matter Phase

We study the thermodynamics of two flavor color superconducting (2SC) quark matter within a nonlocal chiral quark model, using both instantaneous and covariant nonlocal interactions. For applications to compact stars, we impose conditions of electric and color charge neutrality as well as β equilibrium and construct a phase transition to the hadronic matter phase described within the Dirac–Brueckner–Hartree–Fock (DBHF) approach. We obtain mass-radius relations for hybrid star configurations which fulfill modern observational constraints, including compact star masses above 2M⊙.

scholarly journals sQq¯q¯ ( q=u , d ; Q=c , b ) tetraquarks in the chiral quark model

2021 ◽  
Vol 103 (7) ◽  
Author(s):  
Gang Yang ◽  
Jialun Ping ◽  
Jorge Segovia
Keyword(s):  
Quark Model ◽  
Chiral Quark Model

scholarly journals The Genuine Resonance of Full-Charm Tetraquarks

Universe ◽  
2021 ◽  
Vol 7 (5) ◽  
pp. 155
Author(s):  
Xiaoyun Chen
Keyword(s):  
Quark Model ◽  
Bound States ◽  
Expansion Method ◽  
Chiral Quark Model ◽  
Stabilization Method ◽  
Scaling Method ◽  
Resonance States ◽  
Gaussian Expansion Method ◽  
Color Structure ◽  
Quantum Numbers

In this work, the genuine resonance states of full-charm tetraquark systems with quantum numbers JPC=0++,1+−,2++ are searched in a nonrelativistic chiral quark model with the help of the Gaussian Expansion Method. In this calculation, two structures, meson-meson and diquark–antidiquark, as well as their mixing with all possible color-spin configurations, are considered. The results show that no bound states can be formed. However, resonances are possible because of the color structure. The genuine resonances are identified by the stabilization method (real scaling method). Several resonances for the full-charm system are proposed, and some of them are reasonable candidates for the full-charm states recently reported by LHCb.

scholarly journals Structure of pentaquarks Pc+ in the chiral quark model

2017 ◽  
Vol 95 (1) ◽  
Author(s):  
Gang Yang ◽  
Jialun Ping ◽  
Fan Wang
Keyword(s):  
Quark Model ◽  
Chiral Quark Model

QCD constraints on the equation of state for compact stars

2016 ◽  
Vol 956 ◽  
pp. 813-816
Author(s):  
E.S. Fraga ◽  
A. Kurkela ◽  
J. Schaffner-Bielich ◽  
A. Vuorinen
Keyword(s):  
Equation Of State ◽  
Compact Stars

scholarly journals Studying ε′/ε in the chiral quark model: γ5-scheme independence and NLO hadronic matrix elements

1995 ◽  
Vol 449 (1-2) ◽  
pp. 197-225 ◽  
Author(s):  
Stefano Bertolini ◽  
Jan O. Eeg ◽  
Marco Fabbrichesi
Keyword(s):  
Quark Model ◽  
Chiral Quark Model ◽  
Matrix Elements

scholarly journals Quadrupole moments of rotating compact stars

2012 ◽  
Vol 8 (S291) ◽  
pp. 536-536
Author(s):  
Martin Urbanec ◽  
John Miller ◽  
Zdenek Stuchlik
Keyword(s):  
Neutron Star ◽  
Equation Of State ◽  
Neutron Stars ◽  
Strange Star ◽  
Compact Stars ◽  
Quadrupole Moments ◽  
Strange Stars

AbstractWe present quadrupole moments of rotating neutron and strange stars calculated using standard Hartle Thorne approach. We demonstrate differences between neutron and strange star parameters connected with quadrupole moments and how this parameters could be, in the case of neutron stars, approximated almost independently on neutron star equation of state.

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