Electromagnetic decay of vector mesons as derived from QCD sum rules

被引：21
|
作者：
Zhu, SL [1 ]
Hwang, WYP
Yang, ZS
机构：
[1] Peking Univ, Dept Phys, Beijing 100871, Peoples R China
[2] Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan
[3] MIT, Ctr Theoret Phys, Nucl Sci Lab, Cambridge, MA 02139 USA
[4] MIT, Dept Phys, Cambridge, MA 02139 USA
来源：
PHYSICS LETTERS B | 1998年 / 420卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1016/S0370-2693(97)01524-4
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The method of QCD sum rules in the presence of the external electromagnetic field is used to treat the problem of the electromagnetic decay of the various vector mesons, including rho --> pi + gamma, K + gamma, and eta' --> and rho + gamma. The induced condensates obtained previously from the study of baryon magnetic moments are adopted, thereby ensuring the parameter-free nature of the present predictions. Further consistency is reinforced by invoking the various QCD sum rules for the meson masses. The numerical results on the various radiative decays agree very well with the experimental data. (C) 1998 Published by Elsevier Science B.V.
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页码：8 / 12
页数：5
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