U(1)A axial anomaly, η′, and topological susceptibility in the holographic soft-wall model

被引:5
作者
Giannuzzi, Floriana [1 ]
Nicotri, Stefano [1 ]
机构
[1] Ist Nazl Fis Nucl, Sez Bari, Via Orabona 4, I-70125 Bari, Italy
关键词
SYMMETRY BREAKING; CHIRAL-SYMMETRY; LATTICE QCD; SPECTRUM; GLUEBALL; MESON;
D O I
10.1103/PhysRevD.104.014021
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The singlet pseudoscalar sector of light mesons is investigated in the soft-wall model, a bottom-up approach to the AdS/QCD correspondence. The eta' mass results from the mixing among the fields dual to the axial current, pseudoscalar current and the G (G) over tilde operator. The topological susceptibility is computed for any quark mass, and the Witten-Veneziano relation is obtained in the large N-c limit.
引用
收藏
页数:11
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