Abstract
Based on the fact that the constituent quark model reproduces the recent lattice result on baryon-baryon repulsion at short distance and that it includes the quark dynamics with confinement, we analyze to what extent the quarkyonic modes appear in the phase space of baryons as one increases the density before only quark dynamics and hence deconfinement occurs. We find that as one increases the baryon density, the initial quark mode that appears will involve the $d(u)$-quark from a neutron (proton), which will leave the most attractive ($ud$) diquark intact.
Highlights
Recent progresses of multimessenger astrophysics provided important clues to the properties of dense nuclear matter [1,2,3,4,5]
To support the massive neutron stars whose masses are larger than two times the solar mass [1,2,3], it was found that the equation of states (EOS) for dense matter had to be sufficiently hard
Assuming that the quarkyonic matter configuration could appear at moderate densities, this concept has been applied to recent neutron star studies [14,15,16,17,18,19,20,21] where it was found that the hard-soft evolution of the EOS appears naturally inside the neutron star
Summary
Recent progresses of multimessenger astrophysics provided important clues to the properties of dense nuclear matter [1,2,3,4,5]. Assuming that the quarkyonic matter configuration could appear at moderate densities, this concept has been applied to recent neutron star studies [14,15,16,17,18,19,20,21] where it was found that the hard-soft evolution of the EOS appears naturally inside the neutron star. It was recently shown that the short distance part of the baryon-baryon interaction including those with strangeness extracted from the recent lattice calculation [31,32] can be well reproduced using a constituent quark model [33] This result together with the fact that the constituent quark model involves the quark dynamics including the confinement physics, suggests that by analyzing the quark dynamics in the presence of neighboring nucleons, one can realistically assess if the quarkyonic modes naturally appear as one increases the density before only quark dynamics and deconfinement sets in. We summarize our result and give prospects for further studies
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