Tetraquarks with exotic flavor quantum numbers at large Nc in QCD(AS)

被引：26

作者：

Cohen, Thomas D. ^{[1
]}

Lebed, Richard F. ^{[2
]}

机构：

[1] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[2] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA

来源：

PHYSICAL REVIEW D | 2014年 / 89卷 / 05期

基金：

美国国家科学基金会;

关键词：

MESONS;

D O I：

10.1103/PhysRevD.89.054018

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It is shown that the large N-c limit of QCD with quarks in the two-index antisymmetric color representation [QCD(AS)] has narrow tetraquark states with exotic flavor quantum numbers. They decay into mesons with a width that is parametrically O(1/N-c(2)). Tetraquarks with nonexotic quantum numbers mix at leading order with mesons of the same overall quantum numbers. QCD(AS) at N-c = 3 corresponds to ordinary QCD; its large N-c limit represents an alternative starting point for a 1/N-c expansion to the standard one with quarks in the fundamental color representation.

引用

页数：5

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