By analysing the high momentum features of the nucleon momentum distribution in light and complex nuclei, it is argued that the basic two-nucleon configurations generating the structure of the nucleon Spectral Function at high values of the nucleon momentum and removal energy, can be properly described by a factorised ansatz for the nuclear wave function, which leads to a nucleon Spectral Funct...

The collapse-driven supernova is supposed to be an outcome of gravitational collapse of a massive star ∼ 8M at the end of its evolution. Although more than 60 years have passed since the original idea by Baade and Zwicky [1,2], and the detection of neutrinos from SN1987A [3,4] confirmed that our scenario is correct on the whole, we have not yet figured out how this phenomenon occurs. These days...

Correlated basis function theory and Fermi hypernetted chain theory are extended to treat finite Fermi systems . In this first paper, the effects of the scalar nucleon-nucleon correlations are investigated by studying some model N = Z nuclei . Results of calculations performed using central nucleon-nucleon potentials, without tensor components, are presented and are compared with results from o...

Static nucleon polarisabilities gauge the stiffness of the nucleon against an external electro-magnetic field, parameterising the part of the real Compton amplitude at zero energy which is not explained by the pole terms, i.e. by the successive interactions of two photons with a point-like nucleon of anomalous magnetic moment κ. Dynamical nucleon polarisabilities are the energy dependent genera...

The influence of the nuclear medium upon the internal structure of a composite nucleon is examined. The interaction with the medium is assumed to depend on the relative distances between the quarks in the nucleon consistent with the notion of color neutrality, and to be proportional to the nucleon density. In the resulting description the nucleon in matter is a superposition of the ground state...

We show how the renormalization group is used to construct a lowmomentum nucleon-nucleon interaction Vlow k, which unifies all potential models used in nuclear structure calculations. Vlow k can be directly applied to the nuclear shell model or to nucleonic matter without a G matrix resummation. It is argued that Vlow k parameterizes a high-order chiral effective field theory two-nucleon force....

The nucleon structure and the nuclear force are investigated in the context of the nonperturbative path-integral method of hadronization. Starting from a microscopic quark-diquark model, the nucleon is generated as a relativistic bound state and an effective chiral meson-nucleon Lagrangian is derived. Many of the nucleon physical properties are studied using a theory of at most two free paramet...

Conceptual problems of unified two-nucleon force models are discussed. The force models are based on the pion-nucleon vertex and attempt a description of the nucleon-nucleon interaction below and above pion threshold. The conceptual problems arise from the nucleon renormalization due to pionic degress of freedom. Keeping channels with a single pion only no renormalization procedure can be given...

The pion-nucleon and kaon-nucleon scattering lengths are studied in the QCD sum rule. We show that the leading and next-to-leading order terms of the OPE give rise to the Tomozawa-Weinberg and sigma terms, respectively. We also show that in the kaon-nucleon system the Λ(1405) contribution has to be subtracted from the OPE side in order to obtain the scattering length. The odd components of the ...