20-019 Dynamically generated momentum space shell structure of quarkyonic matter via an excluded...
최종 수정일: 2020년 5월 14일
Dynamically generated momentum space shell structure of quarkyonic matter via an excluded volume model
Kie Sang Jeong, Larry McLerran, Srimoyee Sen
Physical Review C 101, 035201 (2020)
https://doi.org/10.1103/PhysRevC.101.035201
Abstract
The phase-space structure of zero-temperature quarkyonic matter is a Fermi sphere of quark matter surrounded by a shell of nucleonic matter. We construct a quasiparticle model of quarkyonic matter based on the constituent quark model, where the quark and nucleon masses are related by m_Q = m_N /N_c, and N_c is the number of quark colors. The region of occupied states is for quarks k_Q < k_F /N_c and for nucleons k_F < k_N < k_F + △. We first consider the general problem of quarkyonic matter with hard-core nucleon interactions. We then specialize to a quasiparticle model where the hard-core nucleon interactions are accounted for by an excluded volume. In this model, we show that the nucleonic shell forms past some critical density related to the hard-core size and for large densities becomes a thin shell. We explore the basic features of such a model and argue this model has the semiquantitative behavior needed to describe neutron stars.
#publication #paper #Nuclear_matter_in_neutron_stars #Quark_model #Nuclear_Physics