The nucleon sigma term from threshold parameters

被引：41

作者：

Olsson, MG ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

来源：

PHYSICS LETTERS B | 2000年 / 482卷 / 1-3期

关键词：

D O I：

10.1016/S0370-2693(00)00505-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A new sum rule determines the nucleon sigma term by the pi N elastic scattering threshold parameters alone. This "threshold" value of sigma(2 mu(2)) provides an independent check of existing values obtained from global dispersive analyses, and also provides a realistic error assignment. Employing a recent analysis of low energy (T-pi < 100 MeV) pi N data our sum rule implies sigma(2 mu(2)) = 71 +/- 9 MeV. (C) 2000 Published by Elsevier Science B.V. All rights reserved.

引用

页码：50 / 56

页数：7

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