Confirmation of the sigma meson

被引：376

作者：

Tornqvist, NA ^{[1
]}

Roos, M ^{[1
]}

机构：

[1] HELSINKI UNIV,HIGH ENERGY PHYS LAB,SF-00014 HELSINKI,FINLAND

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.76.1575

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A very general model and an analysis of data on the lightest 0(++) meson nonet shows that the f(0)(980) and f(0)(1300) resonane poles are two manifestations of the same s (s) over bar state. On the other hand, the u (u) over bar + d (d) over bar state, when unitarized and strongly distorted by hadronic mass shifts, becomes an extremely broad (880 MeV) and light (860 MeV) resonance, with its pole at s = 0.158 - i0.235 GeV2. This is the sigma meson required by models for spontaneous breaking of chiral symmetry. It has been named the Higgs meson QCD, because it generates most of the light hadron masses. It dominates pi pi scattering below 900 MeV and it is also the resonance required by nuclear physics.

引用

页码：1575 / 1578

页数：4

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