Determination of the πNN coupling constant in the VPI/GWU πN→πN partial-wave and dispersion relation analysis

被引：26

作者：

Pavan, MM ^{[1
]}

Arndt, RA

Strakovsky, II

Workman, RL

机构：

[1] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA

[2] Virginia Polytech Inst & State Univ, Dept Phys, Blacksburg, VA 24061 USA

[3] George Washington Univ, Dept Phys, Washington, DC 20052 USA

来源：

PHYSICA SCRIPTA | 2000年 / T87卷

关键词：

D O I：

10.1238/Physica.Topical.087a00065

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Our extraction of the charged pion-nucleon coupling constant from rep elastic scattering data is outlined. A partial wave analysis (T pi < MeV) is performed simultaneously with a fixed-t dispersion relation (DR) analysis (< 800 MeV). The pi NN coupling constant g(2)/4 pi and other DR parameters are searched to find the best fit. The result 13.73+/-0.01+/-0.07 (first error statistical, second systematic) is found to be insensitive to database changes and Coulomb barrier corrections. This value satisfies important elements of low energy QCD like the Goldberger-Treiman discrepancy, the Dashen-Weinstein sum rule, and chiral predictions of threshold pion photoproduction.

引用

页码：65 / 70

页数：6