NN Core Interactions and Differential Cross Sections from One Gluon Exchange

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dc.creatorBarnes, T.
dc.creatorCapstick, S.
dc.creatorKovarik, M. D.
dc.creatorSwanson, E. S.
dc.date1993-02-17
dc.date.accessioned2026-07-07T11:14:57Z
dc.date.available2026-07-07T11:14:57Z
dc.descriptionWe derive nonstrange baryon-baryon scattering amplitudes in the nonrelativistic quark model using the ``quark Born diagram" formalism. This approach describes the scattering as a single interaction, here the one-gluon-exchange (OGE) spin-spin term followed by constituent interchange, with external nonrelativistic baryon wavefunctions attached to the scattering diagrams to incorporate higher-twist wavefunction effects. The short-range repulsive core in the NN interaction has previously been attributed to this spin-spin interaction in the literature; we find that these perturbative constituent-interchange diagrams do indeed predict repulsive interactions in all I,S channels of the nucleon-nucleon system, and we compare our results for the equivalent short-range potentials to the core potentials found by other authors using nonperturbative methods. We also apply our perturbative techniques to the N$Δ$ and $ΔΔ$ systems: Some $ΔΔ$ channels are found to have attractive core potentials and may accommodate ``molecular" bound states near threshold. Finally we use our Born formalism to calculate the NN differential cross section, which we compare with experimental results for unpolarised proton-proton elastic scattering. We find that several familiar features of the experimental differential cross section are reproduced by our Born-order result.
dc.description27 pages, figures available from the authors, revtex, CEBAF-TH-93-04, MIT-CTP-2187, ORNL-CCIP-93-01
dc.identifierhttps://arxiv.org/abs/nucl-th/9302007
dc.identifierhttp://arxiv.org/abs/nucl-th/9302007
dc.identifierPhys.Rev.C48:539-552,1993
dc.identifierdoi:10.1103/PhysRevC.48.539
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/192247
dc.subjectNuclear Theory
dc.titleNN Core Interactions and Differential Cross Sections from One Gluon Exchange
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