Mechanism for a next-to-lowest lying scalar meson nonet

被引：140

作者：

Black, D ^{[1
]}

Fariborz, AH ^{[1
]}

Schechter, J ^{[1
]}

机构：

[1] Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA

来源：

PHYSICAL REVIEW D | 2000年 / 61卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.61.074001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recent work suggests the existence of a nonconventional lowest-lying scalar nonet containing the a(0)(980). Then the a(0)(1450) and also the K-0*(1430) are likely candidates to belong to a conventional p-wave q (q) over bar nonet. However. a comparison of their properties with those expected on this basis reveals a number of puzzling features. It is pointed out that these puzzles can be resolved in a natural and robust way by assuming a ''bare'' conventional p-wave scalar q (q) over bar nonet to mix with a Lighter four-quark qq (q) over bar (q) over bar scalar nonet to form new "physical" states. The essential mechanism is driven by the fact that the isospinor is lighter than the isovector in the unmixed qq (q) over bar (q) over bar multiplet.

引用

页数：10

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