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
收藏
页码：78 / 83
页数：6
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