EFFECTS OF THE U-A(1) ANOMALY ON ETA-]2-GAMMA DECAY

被引：22

作者：

TAKIZAWA, M ^{[1
]}

OKA, M ^{[1
]}

机构：

[1] TOKYO INST TECHNOL, DEPT PHYS, TOKYO 152, JAPAN

来源：

PHYSICS LETTERS B | 1995年 / 359卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(95)01068-2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the eta --> 2 gamma decay using an extended three-flavor Nambu-Jona-Lasinio model that includes the 't Hooft instanton induced interaction. The eta meson mass and the eta --> 2 gamma decay width are reproduced simultaneously with a rather strong instanton induced interaction. The calculated eta decay constant is f(eta) = 2.23 f(pi) and it suggests that the eta meson is no longer a Goldstone boson.

引用

页码：210 / 216

页数：7

共 35 条

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