Abstract In this paper we analyse the efficiency, precision, and accuracy of computing elastic nucleon–nucleon (NN) scattering amplitudes with wave-packet continuum discretisation method (WPCD). This provides approximate solutions at multiple energies simultaneously. We therefore utilise a graphics processing unit to explore benefits inherent parallelism. From theoretical perspective, WPCD prom...

We present a relativistic and unitary approach to pion-and photon-nucleon scattering taking into account the πN , ρN , ωN , ηN , π∆, KΛ and KΣ channels. Our scheme dynamically generates the sand d-wave nucleon resonances N in terms of quasi-local two-body interaction terms. We obtain a fair description of the experimental data relevant for slow vector-meson propagation in nuclear matter. The s-...

Results on three-nucleon (3N) elastic scattering below the pion production threshold are discussed with emphasis on the need for a three-nucleon force (3NF). The large discrepancies found between a theory based on numerical solutions of 3N Faddeev equations with (semi)phenomenological NN potentials only and data point to the need for 3NF’s. This is further supported since another possible reaso...

Local phase equivalent interactions to the nonlocal Kerman, McManus, and Thaler multiple scattering nucleon —nucleus optical potentials are determined. Both firstand second-order contributions in the free nucleon-nucleon transition amplitude are included. The second order terms modify the derived potentials in a nontrivial way and reduce the strengths of the real and imaginary central potential...

We discuss spin-dependent, deep-inelastic scattering from nuclei within a co-variant framework. In the relativistic impulse approximation this is described in terms of the amplitude for forward, virtual-photon scattering from an off-mass-shell nucleon. The general structure of the off-shell nucleon hadronic tensor is derived, and the leading behavior of the off-shell nucleon structure functions...

We discuss the effective field theory approach to nuclear phenomena with typical momentum below the pion mass. We particularly focus on the three body problem. In the J = 3/2 channel, effective field theory is extremelly predictive and we are able to describe the nucleon-deuteron scattering amplitude at the percent level using only two parameters obtained from nucleon-nucleon scattering. We bri...

The nucleon wave function may contain a significant component of s̄s pairs, according to several measurements including the π-nucleon σ term, charm production and polarization effects in deep-inelastic scattering. In addition, there are excesses of φ production in LEAR and other experiments, above predictions based the naive Okubo-Zweig-Iizuka rule, that may be explained if the nucleon wave func...