THE PION POLARIZABILITY FROM QCD SUM-RULES

被引：8
作者：
LAVELLE, MJ [1 ]
NASRALLAH, NF [1 ]
SCHILCHER, K [1 ]
机构：
[1] LEBANESE UNIV,FAC SCI,BEIRUT,LEBANON
来源：
PHYSICS LETTERS B | 1994年 / 335卷 / 02期
关键词：
D O I：
10.1016/0370-2693(94)91415-X
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The electromagnetic polarisability of charged pions, alpha(E), has recently attracted both theoretical and experimental attention. Unfortunately the experimental results disagree with each other. We have investigated this polarisation via a QCD sum rule approach and find alpha(E) = 5.6 +/- 0.5 x 10(-4) fm3, which is in agreement with one experiment and disagrees with the result of chiral perturbation theory.
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页码：211 / 214
页数：4
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