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

Kukulin, V. I.; Rubtsova, O. A.; Platonova, M. N.; Pomerantsev, V. N.; Clement, H.; Skorodko, T.

doi:10.1140/epja/s10050-020-00236-3

Cited by 22 publications

(23 citation statements)

References 51 publications

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“…In pp collisions, the σ meson can be emitted from the intermediate isovector dibaryons as was claimed in [20]. Further, the recent work [33] has demonstrated a crucial role of the dibaryons (both isovector and isoscalar) located near the N N * (1440) threshold in elastic and inelastic Swave N N scattering. In particular, a clear indication of such a dibaryon formation has been found in the data on pp-induced two-pion production [55].…”

Section: Discussionmentioning

confidence: 79%

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

Section: Discussionmentioning

confidence: 99%

“…At √ s = 2.34 GeV, this is likely the t-channel Roper resonance N * (1440) excitation which dominates double-pion production at lower energies. Furthermore, it has been shown recently [33,34] that the N N * (1440) dibaryonic state can be formed at √ s ≃ 2.30 GeV. One should bear in mind however that, due to the high σ-mesonic mode in the Roper resonance decay [1], a similar mechanism for the isospin symmetry breaking to that we propose here for the D 03 decay may be applicable also in the region of the Roper resonance (or N N * (1440) dibaryon) dominance.…”

Section: Energy Dependence Of the Double-pion Production Cross Sectionsmentioning

confidence: 93%

“…However, the D 03 state can also contain 3q-3q configurations with colorless three-quark clusters, the main of which is the ∆∆ configuration. In fact, all known six-quark states are located near the di-hadron thresholds and should be strongly coupled to the respective di-hadron molecular-like states [13,33,34]. The nearer the threshold, the stronger the coupling, and the higher the weight of the respective molecular-like state in the total dibaryon wavefunction.…”

Section: Formalism For the Double-pionmentioning

confidence: 99%

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

Platonova,

Kukulin

2021

Preprint

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The first attempt is made to provide a quantitative theoretical interpretation of the WASAat-COSY experimental data on the basic double-pion production reactions pn → dπ 0 π 0 and pn → dπ + π − in the energy region Tp = 1-1.3 GeV [P. Adlarson et al., Phys. Lett. B 721, 229 (2013)]. The data are analyzed within a model based on production and decay of an intermediate I(J P ) = 0(3 + ) dibaryon resonance D03 (denoted also as d * (2380)). The observed decrease of the near-threshold enhancement (the so-called ABC effect) in the reaction pn → dπ + π − in comparison to that in the reaction pn → dπ 0 π 0 is explained (at least partially) to be due to isospin symmetry violation in the two-pion decay of an intermediate near-threshold scalar σ meson emitted from the D03 dibaryon resonance under conditions of the partial chiral symmetry restoration.

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Section: Discussionmentioning

confidence: 79%

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

Section: Discussionmentioning

confidence: 99%

Section: Energy Dependence Of the Double-pion Production Cross Sectionsmentioning

confidence: 93%

Section: Formalism For the Double-pionmentioning

confidence: 99%

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

Platonova,

Kukulin

2021

Preprint

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“…Thus, to move further one needs a sort of hybrid model combining both quark-gluon and meson-exchange aspects of the N N interaction. The specific model for the nuclear force which unifies both quark-gluon and meson-exchange features -the dibaryon (or dibaryoninduced) model -was developed by Kukulin et al in the last two decades [27,28,29,30,31,32,33] (in the early studies [27,28,29,30] it was called "the dressedbag model"). The model allowed for a very good description of both elastic and inelastic N N scattering phase shifts from zero energy up to T lab = 600-800 MeV (or even up to 1 GeV in some partial waves) [31,32,33] and the deuteron properties [30] using only a few basic parameters.…”

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confidence: 99%

Properties of dibaryons in nuclear medium

Kakenov,

Kukulin,

Pomerantsev

et al. 2020

Preprint

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Properties of six-quark dibaryons in nuclear medium are considered by example of A = 6 nuclei within the three-cluster α + 2N model. Dibaryon production in nuclei leads to the appearance of a threebody force between the dibaryon and nuclear core. This non-conventional scalar force is shown to provide an additional attractive contribution to the three-body binding energy. This three-body contribution improves noticeably agreement between theoretical results and experimental data for the majority of observables. The most serious difference between the traditional N Nforce models and the dibaryon-induced model is found for the nucleon momentum distribution, the latter model providing a strong enrichment of the high-momentum components both for 6 Li and 6 He cases. KeywordsNucleon-nucleon interaction • Dibaryon resonances • Structure of light nuclei 1 Introduction. What is dibaryon concept for nuclear force?The history of the nuclear force, i.e., the force which holds the nucleons in a nucleus together, is very long, contradictory and dramatic. It started almost immediately after the discovery of the neutron by J. Chadwick in 1932 and even now it can in no way be considered as completed. The dominant paradigm suggested by H. Yukawa in 1935 [1] is based on a general idea of pion exchange between nucleons both in free space and inside nuclei.

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Measurement of the T20 component of tensor analyzing power for the incoherent π−-meson photoproduction on a deuteron

Gauzshtein,

Darwish,

Fix

et al. 2024

Nuclear Physics A

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

Cited by 22 publications

References 51 publications

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

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

Properties of dibaryons in nuclear medium

Measurement of the T20 component of tensor analyzing power for the incoherent π−-meson photoproduction on a deuteron

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