A possible quark mechanism for the saturation of nuclear matter

Role of the nuclear vector potential in deep inelastic scattering

“…Such models should account for the saturation properties of nuclear matter, as well as the structure functions of the free nucleon. Early work on this problem [8] was based on the quark-meson coupling model [9] in which quarks interact by the exchange of scalar and vector mesons. More recently, a quark-diquark description of the single nucleon [13,14], based on the NJL model [10], was combined with the mean field description of nuclear matter [11,12].…”

Quark–meson coupling model with the cloudy bag

“…The quark-meson coupling (QMC) model [1] can be considered as an extension of Quantum Hadrodynamics (QHD) to include the effect of the internal structure of a nucleon in matter. The model describes a nuclear system by non-overlapping MIT bags, in which the confined quarks interact through the self-consistent exchange of isoscalar, scalar (σ) and vector (ω) mesons.…”

“…The QMC model can describe the medium modification of the nucleon structure through the quark model, and predict the density (or mean scalar-field) dependence of physical quantities [1]. Expanding such modification in terms of k F and comparing with the values of LECs given in the EFT approach, 1 it may be possible to study whether the internal structure change of a nucleon indeed shows up in matter, since the LECs involve all information on the short distance physics.…”

“…picture [1], it is achieved by introducing the σ and ω mesons. 4 However, the present σ meson is chirally singlet and not the chiral partner of the π meson.…”

Saturation properties of nuclear matter in a relativistic mean field model constrained by the quark dynamics

“…At low densities, it seems quite reasonable to assume that the same relation holds approximately. Such a proportionality holds also, for example, in the QMC model [1,2]. The α * σ and α * ω functions entering in the hadronic Lagrangian would thus be taken as:…”