Spin observables for the pd <-> pi+ t process around the Delta resonance

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dc.creatorCanton, L.
dc.creatorCattapan, G.
dc.creatorPisent, G.
dc.creatorSchadow, W.
dc.creatorSvenne, J. P.
dc.date1998-01-16
dc.date.accessioned2026-07-07T11:11:32Z
dc.date.available2026-07-07T11:11:32Z
dc.descriptionThe proton analyzing power Ay0 and the deuteron tensor analyzing power T20 are evaluated for the pd <-> pi+ t process, in the energy region around and above the Delta resonance. These calculations extend a previous analysis of the excitation function and differential cross-section, based on a model embodying one-- and two-body p-wave absorption mechanisms and isobar excitation. The three-nucleon bound state and the pd scattering state are evaluated through Faddeev techniques for both the Bonn and Paris potentials. The spin variables exhibit a greater sensitivity to the number of included three-nucleon partial waves than the cross-sections, while the role played by the initial-- or final-state interactions appears to be small. The results for the tensor analyzing power at backward angles show a non-negligible dependence on the potentials employed, consistently with what has been previously found for the cross-sections. The calculation of spin observables gives a clear indication that other reaction mechanisms (presumably s-wave two-body absorption) have to be included in the model, in order to reproduce the experimental data below the Delta-resonance, in analogy with the simpler pp <-> pi+ d process.
dc.description14 pages, REVTeX, plus 6 figs., PostScript (PRC, to be published)
dc.identifierhttps://arxiv.org/abs/nucl-th/9801027
dc.identifierhttp://arxiv.org/abs/nucl-th/9801027
dc.identifierPhys.Rev.C57:1588-1594,1998
dc.identifierdoi:10.1103/PhysRevC.57.1588
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/191124
dc.subjectNuclear Theory
dc.titleSpin observables for the pd <-> pi+ t process around the Delta resonance
dc.typetext

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