THE ELECTRIC-DIPOLE AMPLITUDES OF THE NEUTRAL PION-PHOTOPRODUCTION ON THE PROTON NEAR-THRESHOLD

被引：5

作者：

YU, BG ^{[1
]}

CHEON, IT ^{[1
]}

JEONG, MT ^{[1
]}

机构：

[1] DONGSHIN UNIV, DEPT PHYS, NAJU 520714, SOUTH KOREA

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1994年 / 63卷 / 01期

关键词：

ELECTROMAGNETIC DIPOLE AMPLITUDES; PION PHOTOPRODUCTION; VECTOR MESONS; RHO-PI-GAMMA AND OMEGA-PI-GAMMA COUPLING CONSTANTS; LOW ENERGY THEOREM;

D O I：

10.1143/JPSJ.63.78

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electric dipole amplitude E(0+) for p(gamma, pi(0))p near threshold has been extracted from the experimental data by fitting the total cross section in high energy region, E(g)amma > 160 MeV. The result is (-1.56+/-0.10)x10(-3) m(pi+)(-1). This amplitude is calculated by taking the vector mesons into account in the pole model of t-channel. Our analysis manifests a favor of negative sign for the rho pi gamma coupling constant.

引用

页码：78 / 83

页数：6

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