Chiral symmetry and the reaction gamma p->pi(0)p

被引：58

作者：

Bernard, V

Kaiser, N

Meissner, UG

机构：

[1] CTR RECH NUCL,PHYS THEOR BP 28,F-67037 STRASBOURG 2,FRANCE

[2] TECH UNIV MUNICH,PHYS DEPT T39,D-85747 GARCHING,GERMANY

[3] UNIV BONN,INST THEORET KERNPHYS,D-53115 BONN,GERMANY

来源：

PHYSICS LETTERS B | 1996年 / 378卷 / 1-4期

关键词：

D O I：

10.1016/0370-2693(96)00356-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze the new threshold data for neutral pion photoproduction off protons in the framework of heavy baryon chiral perturbation theory. We show that large loop corrections are needed to understand the S-wave multipole E(0+) and that all pertinent low-energy constants can be understood within the framework of resonance exchange saturation. Previous inconsistencies in the description of this reaction in the threshold region are resolved.

引用

页码：337 / 341

页数：5

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