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.
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页码：429 / 446
页数：18
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