Pion Absorption Cross Section for ^2H and ^3He in the Delta-Isobar Region: A Phenomenological Connection

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dc.creatorKamada, H.
dc.creatorLocher, M. P.
dc.creatorLee, T. -S. H.
dc.creatorGolak, J.
dc.creatorMarkushin, V. E.
dc.creatorGlöckle, W.
dc.creatorWitala, H.
dc.date1996-12-19
dc.date.accessioned2026-07-07T11:11:02Z
dc.date.available2026-07-07T11:11:02Z
dc.descriptionThe absorption of π^+ on ^3He in the $Δ$-region is evaluated with exact inclusion of the final state interaction among the three emerging protons. The absorption is described by a $πN \to Δ$ vertex and a $NΔ- NN$ transition t-matrix which are calculated from a phenomenological model for NN and πd reactions. In a calculation where the initial pion scattering effects are neglected, the predicted peaks of the pion absorption cross sections for ^2H and ^3He lie too high in energy in relation to the data. The effect of the final state three-nucleon interaction turns out to be too small for changing the magnitude and shifting the peak position of the total absorption cross section for ^3He. We demonstrate that the adjustment of the peak position for the deuteron cross section by small modifications of the $Δ$-parameters, automatically leads to the correct peak position in ^3He.
dc.description12 pages, REVTeX, 10 PostScript figures, submitted to Phys. Rev. C
dc.identifierhttps://arxiv.org/abs/nucl-th/9612055
dc.identifierhttp://arxiv.org/abs/nucl-th/9612055
dc.identifierPhys.Rev.C55:2563-2570,1997
dc.identifierdoi:10.1103/PhysRevC.55.2563
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190961
dc.subjectNuclear Theory
dc.titlePion Absorption Cross Section for ^2H and ^3He in the Delta-Isobar Region: A Phenomenological Connection
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