πρ correlations in the<i>NN</i>potential

Janssen, Gerhard; Holinde, K.; Speth, J.

doi:10.1103/physrevc.54.2218

Cited by 59 publications

(66 citation statements)

References 22 publications

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“…The for our purpose optimal value of the ωN-coupling constant is g ωN = 10.7. Such a value of g ωN is consistent with g ωN = 10.1 ± 0.9 as obtained from forward NN-dispersion relations [9] and it is also not far from the one used in modern boson exchange NN-potentials [10]. We find from the π 0 -exchange diagrams…”

Section: Accepted For Publication In Physical Review C (Brief Reports)supporting

confidence: 90%

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pp→ppωreaction near threshold

Kaiser

1999

Phys. Rev. C

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We analyze the total cross section data for pp → ppω near threshold measured recently at SATURNE. Using an effective range approximation for the on-shell pp Swave final state interaction we extract from these data the modulus |Ω| = 0.53 fm 4 of the threshold transition amplitude Ω. We present a calculation of various (tree-level) meson exchange diagrams contributing to Ω. It is essential that ω-emission from the anomalous ωρπ-vertex interferes destructively with ω-emission from the proton lines. The contribution of scalar σ-meson exchange to Ω turns out to be negligibly small. Without introducing off-shell meson-nucleon form factors the experimental value |Ω| = 0.53 fm 4 can be reproduced with an ωN -coupling constant of g ωN = 10.7. The results of the present approach agree qualitatively with the Jülich model. We also perform a combined analysis of the reactions pp → ppπ 0 , pnπ + , ppη, ppω and pn → pnη near threshold.

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Section: Accepted For Publication In Physical Review C (Brief Reports)supporting

confidence: 90%

“…The chosen value g ρN = 3.04 lies in between g ρN = 2.63 ± 0.14 as obtained from πN-dispersion relations [11] and g ρN = 3.25 as employed in the NN-potential of ref. [10]. Furthermore, we consider a scalar σ-meson exchange and find…”

Section: Accepted For Publication In Physical Review C (Brief Reports)mentioning

confidence: 99%

pp→ppωreaction near threshold

Kaiser

1999

Phys. Rev. C

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“…deuteron. We will show that our conclusions are not ruled out by this exceptional case 19 . Note that within the renormalization approach this particular situation has been scanned through in Fig.…”

Section: Discussionmentioning

confidence: 71%

“…As a consequence there has been some inconsistency between the couplings required from meson physics, SU(3) or chiral symmetry on the one hand and those from NN scattering fits on the other hand (see also [15,16,17]). Part of the disagreement could only be overcome after even shorter scales were explicitly considered [18,19]. A more serious shortcoming stems from the use of strong form factors which have mainly been phenomenologically motivated and loosely related to the field theoretical mesonbaryon Lagrangean from which the meson exchange picture is derived.…”

Section: Introductionmentioning

confidence: 99%

Renormalization versus strong form factors for one-boson-exchange potentials

Cordón

Arriola

2010

Phys. Rev. C

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We analyze the One Boson Exchange Potential from the point of view of Renormalization theory. We show that the nucleon-meson Lagrangean while predicting the NN force does not predict the NN scattering matrix nor the deuteron properties unambiguously due to the appearance of short distance singularities. While the problem has traditionally been circumvented by introducing vertex functions via phenomenological strong form factors, we propose to impose physical renormalization conditions on the scattering amplitude at low energies. Working in the large Nc approximation with π,σ,ρ and ω mesons we show that, once these conditions are applied, results for low energy phases of proton-neutron scattering as well as deuteron properties become largely insensitive to the form factors and to the vector mesons yielding reasonable agreement with the data and for realistic values of the coupling constants.

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“…[46], however, for simplicity in the present model they are effectively parameterized by oneboson-exchange diagrams with the appropriate quantum numbers assuming the coupling constants to be free parameters. Furthermore, the new model contains the exchange of an ω ′ with a mass of m ω ′ = 1120 MeV considered to be an effective parametrization of short-range contributions from correlated π − ρ exchange [49] in the vector-isoscalar sector. Its inclusion allows to keep the coupling constants of the genuine ω(782) meson to the baryons in line with their SU(3) values, cf.…”

Section: Model For Correlated ππ + Kk Exchangementioning

confidence: 99%

The Hyperon-Nucleon Interaction: Conventional Versus Effective Field Theory Approach

Haidenbauer¹,

Meißner

Nogga³

et al.

Lecture Notes in Physics

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Hyperon-nucleon interactions are presented that are derived either in the conventional meson-exchange picture or within leading order chiral effective field theory. The chiral potential consists of one-pseudoscalar-meson exchanges and non-derivative four-baryon contact terms. With regard to meson-exchange hyperon-nucleon models we focus on the new potential of the Jülich group, whose most salient feature is that the contributions in the scalar-isoscalar (σ) and vector-isovector (ρ) exchange channels are constrained by a microscopic model of correlated ππ and KK exchange.

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πρ correlations in theNNpotential

Cited by 59 publications

References 22 publications

pp→ppωreaction near threshold

pp→ppωreaction near threshold

Renormalization versus strong form factors for one-boson-exchange potentials

The Hyperon-Nucleon Interaction: Conventional Versus Effective Field Theory Approach

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