Pion-distribution amplitude within the instanton model

被引：0
作者：
I. V. Anikin
A. E. Dorokhov
L. Tomio
机构：
[1] Univ. Estadial Paulista (UNESP),Instituto de Física Teórica
[2] Joint Institute for Nuclear Research,undefined
来源：
Physics of Atomic Nuclei | 2001年 / 64卷
关键词：
Elementary Particle; Form Factor; Transition Form; Gauge Invariance; Previous Calculation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The leading-twist pion-distribution amplitude is obtained at a low normalization scale of order ρc (inverse average size of an instanton). Pion dynamics, consistent with gauge invariance and low-energy theorems, is considered within the instanton vacuum model. The results are QCD-evolved to higher momentum-transfer values and are in agreement with recent data from CLEO on the pion transition form factor. It is also shown that some previous calculations violate the axial Ward-Takahashi identity.
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页码：1329 / 1336
页数：7
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