To the Nature of Nuclear Force

Abstract

It has been shown for the first time that N N interaction, at least in some partial waves, can be quantitatively described by the superposition of a long-range one-pion exchange and a short-range mechanism based on the complex pole in the N N potential corresponding to the dibaryon resonance in this partial wave. For the partial waves 3 P 2 , 1 D 2 , 3 F 3 and 1 S 0 the parameters of the complex poles that give the best description of the elastic and inelastic phase shifts of N N scattering are very close to the empirical parameters of the corresponding isovector dibaryon resonances detected experimentally.Based on the results obtained, a general conclusion is made about the nature of nuclear force at medium and small internucleon distances.

Isospin symmetry breaking in double-pion production in the region of ${d^*(2380)}$ and the scalar $σ$ meson

“…The recent experimental and theoretical confirmations of this novel mechanism can be found in Refs. [33,[57][58][59].…”

Nature of $\bm{S}$-wave $\bm{NN}$ interaction and dibaryon production at nucleonic resonance thresholds

“…In Refs. [17,18,19], we elaborated a unified model that can describe well both elastic phase shifts and inelasticities in N N scattering in various partial-wave channels at laboratory energies from zero up to about 1 GeV. Thus, it has been shown that one can reproduce quite satisfactorily both elastic and inelastic N N scattering phase shifts in a broad energy range using only a one-term separable potential with a pole-like energy dependence (with complex energy) for the main part of interaction and the one-pion exchange potential (OPEP) for the peripheral part of interaction.…”

“…Thus, it has been shown that one can reproduce quite satisfactorily both elastic and inelastic N N scattering phase shifts in a broad energy range using only a one-term separable potential with a pole-like energy dependence (with complex energy) for the main part of interaction and the one-pion exchange potential (OPEP) for the peripheral part of interaction. The model was applied to various partial-wave channels with L > 0: 1 D 2 , 3 P 0 , 3 P 2 , 3 D 3 -3 G 3 and others, and the theoretical parameters (mass and width) of dibaryon resonances found from the fit of N N scattering in these channels turned out to be very close to their experimental values [17,18,19].…”

“…In the description of N N scattering within the dibaryoninduced model, we considered first the isovector partial channels 1 D 2 , 3 P 2 , 3 F 3 and others, where the dibaryon resonances near the N ∆ threshold (respectively, 1(2 + ), 1(2 − ), 1(3 − ), etc.) can be formed [17,18]. We have shown that these resonances determine almost completely N N scattering in the respective partial channels at energies from zero to about 600-800 MeV (lab.).…”

“…In Sec. 2 we briefly outline the theoretical formalism of the dibaryon-induced model for the N N interaction [17,18,19] with some modifications necessary to apply it to S-wave scattering. Then in Sec.…”