For excited nucleon states N* of arbitrary spin coupling to nucleon (N) and meson (M), we
propose a Lorentz covariant orbital-spin (L− S) scheme for the effective N* NM couplings. To …

The scattering amplitude for NN→ NΔ is decomposed into sixteen independent spin-space
operators Oi, where the corresponding coefficients Ai only depend on scattering angle …

Background: Elastic scattering is probably the main event in the interactions of nucleons with
nuclei. Even if this process has been extensively studied in the past years, a consistent …

Extraction of spin-longitudinal and-transverse response functions from polarization transfer
measurements of nucleon-nucleus quasifree scatterings is discussed. The method proposed …

A recently developed helicity basis for nucleon-nucleon (NN) scattering is applied to the
deuteron bound state. Here the total spin of the deuteron is treated in such a helicity …

Using a non-relativistic constituent quark model of the nucleon which incorporates pion
exchange between quarks we are able to calculate a modified OPE NN potential which …

A phenomenological Lorentz covariant representation of the NN t-matrix has been obtained
with parameters that are explicitly energy dependent. The real and imaginary parts of the t …

Large violations of the OZI-rule have been observed in pp-annihilation into ϕ mesons when
the initial state is in triplet spin configuration. One possible explanation for this phenomenon …

We outline an elegant way of deducing the spin structure of any reaction A (a, b) B with
arbitrary spins s A, sa, sb, s B and apply the same to NN→ N Δ, taking into consideration the …

The orthogonal transformation from the spin representation to the pseudospin
representation for the nucleon-nucleon scattering matrix is derived. The phase shifts and …