Theoretical Nuclear and Subnuclear Physics

Relaxation of excited electrons in a paramagnetic electron gas: The role of spins in screening and scattering

“…͑4͒ properly, i.e., V e f f (r)ϭV 1 (r)ϩ3J(r) and V e f f (r)ϭV 1 (r)ϪJ(r) for the singlet and triplet channels, respectively. 8,11 The explicit implementation of the present formalism needs, in the spirit of Sec. I, physically reasonable forms for V 1 (r) and J(r) to Eq.…”

Thermodynamic consistency, quark mass scaling, and properties of strange matter

“…It is usually introduced to meet some special purposes. For example, in the relativistic mean-field theory, an effective nucleon mass, M à ¼ M N − gϕ with g the coupling and ϕ the scalar field, was introduced to make the equation of motion become the Dirac equation [61]; in the NJL model, the quark's effective mass was introduced as m à q ¼ M q − Ghqqi [62]; to avoid complexity of nonlocality in the many-body theory of the early stage, the interacting nucleon was treated as a particle with kinetic energy E k ¼ p 2 =ð2M Ã Þ þ a where the effective mass satisfies 1=M à ¼ 1=M þ 2b [63]; in quantum hadrondynamics, an effective mass of the nucleon was determined by a self-consistent equation [64]; etc.…”

Density dependent nuclear matter compressibility

“…For λ = β = γ = 0 the Walecka model [8] is reproduced, for λ = 1 and β = γ = 0 the ZM1 model [9] is recovered, for λ = β = γ = 1 the ZM3 model [9] results, and λ = β = γ → ∞ describes the exponential model [10]. In addition to the possibility of creating models using intermediate values of the parameters, we can group the parameters according to the combinations in which they are being varied:…”

“…To solve the system analytically and in a self-consistent way the mean-field approximation is used, since for higher densities the fluctuations of the meson fields are negligible (see for instance Ref. [8]). …”