mπ and Nc dependence of ρ and σ mesons from unitarized chiral perturbation theory

被引：0

作者：

Rios, G. ^{[1
]}

Hanhart, C. ^{[2
]}

Pelaez, J. R. ^{[1
]}

机构：

[1] Univ Complutense Madrid, Dept Fis Teor 2, E-28040 Madrid, Spain

[2] Forschungszentrum Julich GmbH, Inst Kernphys & Julich Ctr Hadron Phys, Julich, Germany

来源：

IX INTERNATIONAL CONFERENCE ON QUARK CONFINEMENT AND THE HADRON SPECTRUM (QCHS IX) | 2011年 / 1343卷

关键词：

Scalar mesons; chiral Lagrangian; 1/N-c expansion;

D O I：

10.1063/1.3575125

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We review the N-c and m(pi) dependence of the rho(770) and sigma (or f(0)(600)) resonances generated with the Inverse Amplitude Method. The sigma N-c behavior is at odds with being dominantly a (q) over barq state, but there is a hint of a subdominant (q) over barq component with a mass above 1 GeV. We find fair agreement with lattice results for the chiral extrapolation of the rho mass, and that the p pi pi coupling is almost m(pi) independent whereas the sigma pi pi coupling depends strongly on m(pi).

引用

页码：632 / 632

页数：1

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