Analyzing powers in (p)over-right-arrow-p→pnπ+ and determination of pion S and P wave amplitudes near threshold

被引：13

作者：

Daehnick, WW ^{[1
]}

Flammang, RW

Dytman, SA

Tedeschi, DJ

Thompson, RA

Vrana, T

Foster, CC

Hardie, JG

Jacobs, WW

Rinckel, T

Stephenson, EJ

Pancella, PV

Brooks, WK

机构：

[1] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

[2] Indiana Univ, Cyclotron Facil, Bloomington, IN 47405 USA

[3] Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA

[4] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

来源：

PHYSICS LETTERS B | 1998年 / 423卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(98)00079-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Analyzing powers were measured and used to quantify the observation that a-wave processes dominate near threshold. Values of A(gamma)(theta(pi),phi(pi) = 0 degrees) are presented for eta values of 0.22, 0.42 and 0.50. Maximum analyzing powers A(N0) are equal to -0.13, -0.24, and -0.28, respectively. A partial wave analysis, made possible by the new analyzing powers and available cross sections, indicates that the a-wave contribution to the cross section constitutes about 91% of the total cross section at eta = 0.22, or 300 MeV. It decreases to about 75% for eta = 0.5. (C) 1998 Elsevier Science B.V.

引用

页码：213 / 218

页数：6

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