The gamma gamma->pi(0)pi(0) and eta->pi(0)gamma gamma transitions in the extended NJL model

被引：25
|
作者：
Bijnens, J
Fayyazuddin, A
Prades, J
机构：
[1] UNIV VALENCIA, CSIC, IFIC, E-46100 BURJASSOT, VALENCIA, SPAIN
[2] UNIV VALENCIA, DEPT FIS TEOR, E-46100 BURJASSOT, VALENCIA, SPAIN
来源：
PHYSICS LETTERS B | 1996年 / 379卷 / 1-4期
关键词：
hadronic physics; neutral pion; eta meson; NJL model;
D O I：
10.1016/0370-2693(96)00455-8
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We calculate within the Extended Nambu-Jona-Lasinio model the leading in 1/N-c contribution to gamma gamma gamma --> pi(0) pi(0) to all orders in the external momenta and quark masses. This result is then combined with the known two-loop Chiral Perturbation Theory and compared with the data and other calculations. A technical difficulty in the same calculation beyond order p(6) for eta --> pi(0) gamma gamma is identified and for this decay results up to order p(6) are presented.
引用
收藏
页码：209 / 218
页数：10
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