2013/04/30 by Zhao-Qing Feng · 1 citation
Physics and Astronomy · #nucl-th
paper · pdf · doi:10.1103/physrevc.87.064605
published as Phys. Rev. C 87 (2013) 064605 · 8 pages, 6 figures. arXiv admin note: text overlap with arXiv:1111.6863
arxiv created 2013/10/31 · arxiv updated 2015/06/15
Subthreshold kaon (K0 and K+) production in neutron-rich nuclear reactions to probe the kaon-nucleon interaction in nuclear medium and to extract the isospin dependent part of the nuclear equation of state at high-baryon densities, is investigated within an isospin and momentum dependent transport model. A repulsive kaon-nucleon potential is implemented in the model through fitting the flow data and inclusive spectra in heavy-ion collisions, which enhances the energetic kaon emission squeezed out in the reaction zone and leads to a variation of the high-momentum spectrum of the K0/K+ yields. It is found that the stiffness of nuclear symmetry energy plays a significant role on the isospin ratio with decreasing the incident energy and a hard symmetry energy has a larger value of the K0/K+ ratio in the domain of subthreshold energies.