Equation of state for nucleonic matter and its quark mass dependence from the nuclear force in lattice QCD.
Quark mass dependence of the equation of state (EOS) for nucleonic matter is investigated, on the basis of the Brueckner-Hartree-Fock method with the nucleon-nucleon interaction extracted from lattice QCD simulations. We observe saturation of nuclear matter at the lightest available quark mass corresponding to the pseudoscalar meson mass ≃469  MeV. Mass-radius relation of the neutron stars is also studied with the EOS for neutron-star matter from the same nuclear force in lattice QCD. We observe that the EOS becomes stiffer and thus the maximum mass of neutron star increases as the quark mass decreases toward the physical point.
College of Bioresource Sciences, Nihon University, Kanagawa 252-0880, Japan.
Takashi
T
Inoue
Sinya
S
Aoki
Takumi
T
Doi
Tetsuo
T
Hatsuda
Yoichi
Y
Ikeda
Noriyoshi
N
Ishii
Keiko
K
Murano
Hidekatsu
H
Nemura
Kenji
K
Sasaki
D004601:Elementary Particles; D008962:Models, Theoretical; D009502:Neutrons; D009686:Nuclear Physics / Q000379:methods*