Four-nucleon system with Δ-isobar excitation
Copyright policy )Four-nucleon system with Δ-isobar excitation
The four-nucleon bound state and scattering below three-body breakup threshold are described based on the realistic coupled-channel potential CD Bonn + $��$ which allows the excitation of a single nucleon to a $��$ isobar. The Coulomb repulsion between protons is included. In the four-nucleon system the two-baryon coupled-channel potential yields effective two-, three- and four-nucleon forces, mediated by the $��$ isobar and consistent with each other and with the underlying two-nucleon force. The effect of the four-nucleon force on the studied observables is much smaller than the effect of the three-nucleon force. The inclusion of the $��$ isobar is unable to resolve the existing discrepancies with the experimental data.
11 figures, to be published in Phys. Lett. B
Nuclear and High Energy Physics, Δ-isobar, Nuclear Theory, scattering, Bound state, many-nucleon forces, FOS: Physical sciences, Many-nucleon forces, four-nucleon, Scattering, Nuclear Theory (nucl-th), bound state, Delta-isobar, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, Four-nucleon
Nuclear and High Energy Physics, Δ-isobar, Nuclear Theory, scattering, Bound state, many-nucleon forces, FOS: Physical sciences, Many-nucleon forces, four-nucleon, Scattering, Nuclear Theory (nucl-th), bound state, Delta-isobar, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, Four-nucleon
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