ASYMMETRIES IN 100 MEV PI(+)/PI(-)-HE-3-] ELASTIC-SCATTERING

被引：9
作者：
LARSON, B
HAUSSER, O
ALSTER, J
BAHRAMI, M
BRASH, EJ
CUMMINGS, WJ
DELHEIJ, PPJ
HENDERSON, R
OTTEWELL, D
RAHAV, A
RAM, S
VETTERLI, MC
WHITTAL, DM
机构：
[1] SIMON FRASER UNIV, BURNABY V5A 1S6, BC, CANADA
[2] TRIUMF, VANCOUVER V6T 2A3, BC, CANADA
[3] TEL AVIV UNIV, IL-69978 TEL AVIV, ISRAEL
来源：
PHYSICAL REVIEW C | 1994年 / 49卷 / 04期
关键词：
D O I：
10.1103/PhysRevC.49.2045
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We have measured cross sections and analyzing powers for pi+ and pi- elastic scattering from a polarized He-3 target at T(pi) = 100 MeV. Measurements have been made over an angular range of 60-degrees to 110-degrees 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 A(y) observed in pi+ scattering from He-3 near theta(lab = 80-degrees). The A(y) data for both pi+ and pi- 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--He-3 scattering resembles the asymmetry for pi- scattering from a free neutron near the cross section minimum and is about half that for pi+ scattering.
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页码：2045 / 2053
页数：9
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