We investigate the effects of meson-mass reduction on the properties of the neutron star matter. We adopt the Brown-Rho scaling law to take into account density dependence of meson masses in the quantum hadrodynamics, quark-meson coupling and modified quark-meson coupling models. It is found that the equation of state becomes stiff when the mass of meson is reduced in dense medium. We discuss its implication on the properties of the neutron star.
机构:
Peking Univ, Dept Phys, Beijing 100871, Peoples R China
Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R ChinaPeking Univ, Dept Phys, Beijing 100871, Peoples R China
Shao, Guo-yun
Liu, Yu-xin
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机构:
Peking Univ, Dept Phys, Beijing 100871, Peoples R China
Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
Ctr Theoret Nucl Phys, Natl Lab Heavy Ion Accelerator, Lanzhou 730000, Peoples R ChinaPeking Univ, Dept Phys, Beijing 100871, Peoples R China