N.V. Shevchenko

Low-energy ηd-resonance

Abstract: Elastic ηd-scattering is considered within the Alt-Grassberger-Sandhas (AGS) formalism for various ηN input data. A three-body resonant state is found close to the ηd threshold. This resonance is sustained for different choices of the two-body ηN-scattering length aηN. The position of the resonance moves towards the ηd threshold when ReaηN is increased, and turns into a quasi-bound state at ReaηN∼ 0.7-0.8 fm depending on the choice of ImaηN.

Low-energy eta d resonance

Abstract: Elastic ηd-scattering is considered within the Alt-Grassberger-Sandhas (AGS) formalism for various ηN input data. A three-body resonant state is found close to the ηd threshold. This resonance is sustained for different choices of the two-body ηN-scattering length aηN. The position of the resonance moves towards the ηd threshold when ReaηN is increased, and turns into a quasi-bound state at ReaηN∼ 0.7-0.8 fm depending on the choice of ImaηN.

Binding of charmonium with two- and three-body nuclei

Abstract The energies of the η c – d and η c –3He bound states are calculated by using genuine three- and four-body scattering equations. For the NN interaction the separable version of the Paris potential is used. For the η c N interaction we adopted a local Yukawa-type potential which is expanded into a series of separable potentials by means of the unitary pole approximation method. The results are compared with earlier calculations.

Coherent photoproduction of η-mesons on three-nucleon systems

Abstract A microscopic few-body description of near-threshold coherent photoproduction of the η meson on tritium and 3 He targets is given. The photoproduction cross section is calculated using the Finite Rank Approximation (FRA) of the nuclear Hamiltonian. The results indicate a strong final state interaction of the η meson with the residual nucleus. Sensitivity of the results to the choice of the ηN T -matrix is investigated.

Photoproduction of η-mesons off light nuclei

Photoproduction of

Nuclear fusion via triple collisions in solar plasma

\eta

Microscopic description of η-photoproduction on light nuclei

-mesons off deuteron is studied within the Alt-Grassberger-Sandhas formalism for different parameters of

Microscopic Description of η-nuclear Systems

\eta N

Eta photoproduction off three body nuclei

interaction. The calculations revealed peaks in the energy dependence of the total cross-section.

Near threshold photoproduction of eta mesons on three nucleon nuclei

Abstract We consider several nuclear fusion reactions that can take place at the center of the sun, which are omitted in the standard pp-chain model. More specifically the reaction rates of the nonradiative production of 3 He, 7 Be, and 8 B nuclei in triple collisions involving electrons are estimated within the framework of the adiabatic approximation. These rates are compared with those of the corresponding binary fusion reactions.