Electromagnetic self-energies of neutral pions: contributions from vector resonances

被引：1
|
作者：
Gao, DN [1 ]
Yan, ML
机构：
[1] Univ Naples, Dipartimento Sci Fisiche, Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy
[2] Univ Sci & Technol China, Ctr Fundamental Phys, Hefei 230026, Anhui, Peoples R China
[3] China Ctr Adv Sci & Technol, World Lab, Beijing 100080, Peoples R China
来源：
PHYSICS LETTERS B | 2000年 / 495卷 / 1-2期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/S0370-2693(00)01175-8
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
By employing vector-meson dominance to establish the electromagnetic interactions of hadrons, the electromagnetic self-energy of the neutral pions, which receives the contributions from the vector resonances due to chiral anomaly, is evaluated. This part of the electromagnetic mass, which can contribute to the mass difference of pi (+/-)-pi (0), is finite and as expected, is smaller than the contributions due to isospin symmetry breaking and electromagnetic chiral logs corrections, however, could be compared with the contribution from the short-distance QCD. (C) 2000 Published by Elsevier Science B.V.
引用
收藏
页码：69 / 73
页数：5
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