Axial U(1) dynamics in η and η′ photoproduction

被引：14

作者：

Bass, SD ^{[1
]}

Wetzel, S

Weise, W

机构：

[1] Tech Univ Munich, Dept Phys, D-85747 Garching, Germany

[2] ECT, I-38050 Trento, Italy

来源：

NUCLEAR PHYSICS A | 2001年 / 686卷

关键词：

photoproduction; U(1)-problem; eta meson; eta-prime meson; coupled channels; chiral Lagrangian;

D O I：

10.1016/S0375-9474(00)00574-1

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We discuss the sensitivity of eta and eta' photoproduction near threshold to the gluonic OZI breaking parameters in the U-A(1)-extended effective chiral Lagrangian for low-energy QCD. Our coupled-channels analysis hints at a strong correlation between the gluon-induced contributions to the eta' mass and the low-energy pp --> pp eta' reaction and the near-threshold behaviour of the gammap --> etap cross section, (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：429 / 446

页数：18