Meson loops in the f0(980) and a0(980) radiative decays into ρ, ω

被引：31
|
作者：
Nagahiro, H. [1 ]
Roca, L. [2 ,3 ]
Oset, E. [4 ,5 ]
机构：
[1] Res Ctr Nucl Phys, Osaka 5670047, Japan
[2] Univ Murcia, Dept Fis, E-30071 Murcia, Spain
[3] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan
[4] Univ Valencia, CSIC, Ctr Mixto, Inst Invest Paterna,Dept Fis Teor, Valencia 46071, Spain
[5] Univ Valencia, CSIC, Ctr Mixto, Inst Invest Paterna,IFIC, Valencia 46071, Spain
来源：
EUROPEAN PHYSICAL JOURNAL A | 2008年 / 36卷 / 01期
关键词：
D O I：
10.1140/epja/i2008-10567-8
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 calculate the radiative decay widths of the a(0)(980) and f(0)(980) scalar mesons into rho gamma and omega gamma considering the dynamically generated nature of these scalar resonances within the realm of the chiral unitary approach. The main ingredient in the evaluation of the radiative width of the scalar mesons are the loops coming from the decay into their constituent pseudoscalar-pseudoscalar components and the subsequent radiation of the photon. The dominant diagrams with only pseudoscalar mesons in the loops are found to be convergent while the divergence of those with a vector meson in the loop are written in terms of the two-meson loop function easily regularizable. We provide results for all the possible charge channels and obtain results, with uncertainties, which differ significantly from quark loops models and some version of vector meson dominance.
引用
收藏
页码：73 / 84
页数：12
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