Asymmetries for elastic scattering of pi+ from polarized He-3 and the Delta neutron spin spin interaction

Espy, M.A.; Dehnhard, D.; Edwards, C.M.; Palarczyk, M.; Langenbrunner, J.L.; Davis, B.; Burleson, G.R.; Blanchard, S.; Gibbs, W.R.; Lail, B.

doi:10.1103/PhysRevLett.76.3667

Asymmetries for elastic scattering of pi+ from polarized He-3 and the Delta neutron spin spin interaction

1996

4 pages

Published in:

Phys.Rev.Lett. 76 (1996) 3667-3670

DOI:

10.1103/PhysRevLett.76.3667

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Abstract: (APS)

Asymmetries for π+ elastic scattering from polarized 3He were measured across the Δ(1232) π-nucleon resonance region at incident energies Tπ=142, 180, and 256 MeV. Large discrepancies were found between the data and calculations that use the multiple scattering formalism and Faddeev wave functions. Inclusion of a Δ-neutron spin-spin interaction term in the calculations gives a greatly improved representation of the data.

pi+ nucleus: elastic scattering
elastic scattering: pi+ nucleus
helium: nuclide
helium: polarized target
polarized target: helium
interaction: n Delta(1232)
n Delta(1232): interaction
spin: interaction
interaction: spin
multiple scattering

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