Asymmetries in 100 MeV [pi][sup +]/[pi][sup [minus]]-[sup 3][rvec H]e elastic scattering

Journal Article · Fri Apr 01 04:00:00 EST 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.49.2045· OSTI ID:5016441

Larson, B; Haeusser, O; Alster, J; Bahrami, M; Brash, E J; Cummings, W J; Delheij, P P.J.; Henderson, R; Ottewell, D; Rahav, A; Ram, S; Vetterli, M C; Whittal, D M ^[1]

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1. Ohio University, Athens, Ohio 45701 (United States) Simon Fraser University, Burnaby, British Columbia, V5A 1S6 (Canada) TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 (Canada) Tel-Aviv University, Ramat Aviv, Israel 69978 (United States)

We have measured cross sections and analyzing powers for [pi][sup +] and [pi][sup [minus]] elastic scattering from a polarized [sup 3]He target at [ital T][sub [pi]]=100 MeV. Measurements have been made over an angular range of 60[degree] to 110[degree] which extends over the region of the cross section minimum where spin effects in [pi]-nucleus scattering are predicted to be largest. This is evident from the large value of [ital A][sub [ital y]] observed in [pi][sup +] scattering from [sup 3]He near [theta][sub lab]=80[degree]. The [ital A][sub [ital y]] data for both [pi][sup +] and [pi][sup [minus]] scattering are qualitatively reproduced by a schematic PWIA model; however, agreement with the data is significantly improved when a full nonlocal DWIA reaction model employing realistic three-body wave functions is used. The asymmetry in [pi][sup [minus]]-[sup 3]He scattering resembles the asymmetry for [pi][sup [minus]] scattering from a free neutron near the cross section minimum and is about half that for [pi][sup +] scattering.

• OSTI ID: 5016441
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 49:4; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663460* -- Meson- & Hyperon-induced Reactions & Scattering-- (1992-)
663510 -- Nuclear Mass Ranges-- A=1-5-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANALYZING POWER
ASYMMETRY
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DISTORTED WAVE THEORY
ELASTIC SCATTERING
ENERGY RANGE
EXPERIMENTAL DATA
HADRON REACTIONS
HELIUM 3 TARGET
IMPULSE APPROXIMATION
INFORMATION
MESON REACTIONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUMERICAL DATA
PION MINUS REACTIONS
PION PLUS REACTIONS
PION REACTIONS
POLARIZATION
POLARIZED TARGETS
SCATTERING
TARGETS