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

Journal Article · Wed May 01 04:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.76.3667· OSTI ID:285693

Espy, M A; Dehnhard, D; Edwards, C M; Palarczyk, M; Langenbrunner, J L; Davis, B ^[1]; Burleson, G R; Blanchard, S; Gibbs, W R; Lail, B; Nelson, B; Park, B K; Zhao, Q ^[2]; Cummings, W J; Delheij, P P; Jennings, B K; Henderson, R; Haeusser, O; Thiessen, D ^[3]; Brash, E ; Jones, M K ^[4]; Larson, B ^[5]; Brinkmoeller, B ^[6]; Maeda, K ^[7]; Morris, C L; ODonnell, J M; Penttilae, S; Swenson, D; Tupa, D ^[8]; Bennhold, C ^[9]; Kamalov, S S ^[10]

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1. School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
2. Department of Physics, New Mexico State University, Las Cruces, New Mexico 88003 (United States)
3. TRIUMF, Vancouver, V6T 2A3 (CANADA)
4. Rutgers University, Piscataway, New Jersey 08854 (United States)
5. Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701 (United States)
6. Physikalisches Institut der Universitaet, Karlsruhe (Germany)
7. Department of Physics, Tohoku University, Kawauchi, Sendai (Japan)
8. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
9. Center for Nuclear Studies, Department of Physics, The George Washington University, Washington, D.C. 20052 (United States)
10. JINR Dubna, Moscow (Russia)

Asymmetries for {pi}{sup +} elastic scattering from polarized {sup 3}He were measured across the {Delta}(1232) {pi}-nucleon resonance region at incident energies {ital T}{sub {pi}}=42, 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 {Delta}-neutron spin-spin interaction term in the calculations gives a greatly improved representation of the data. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 285693
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 20 Vol. 76; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ASYMMETRY
DELTA-1232 BARYONS
ELASTIC SCATTERING
HELIUM 3 TARGET
INTERACTIONS
MULTIPLE SCATTERING
NEUTRONS
PION PLUS REACTIONS
RESONANCE
SPIN
WAVE FUNCTIONS