DsJ+(2632):: An excellent candidate of tetraquarks -: art. no. 094009

被引：33

作者：

Liu, YR ^{[1
]}

Zhu, SL

Dai, YB

Liu, C

机构：

[1] Peking Univ, Dept Phys, Beijing 100871, Peoples R China

[2] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China

来源：

PHYSICAL REVIEW D | 2004年 / 70卷 / 09期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1103/PhysRevD.70.094009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze various possible interpretations of the narrow state D-sJ(2632) which lies 100 MeV above threshold. This interesting state decays mainly into D(s)eta instead of (DK+)-K-0. If this relative branching ratio is further confirmed by other experimental groups, we point out that the identification of D-sJ(2632) either as a c (s) over bar state or more generally as a (3) over bar state in the SU(3)(F) representation is probably problematic. Instead, such an anomalous decay pattern strongly indicates D-sJ(2632) is a four-quark state in the SU(3)(F) 15 representation with the quark content 1/2root2 (ds (d) over bar +sd (d) over bar +su (u) over bar -2ss (s) over bar)(c) over bar. We discuss its partners in the same multiplet and the similar four-quark states composed of a bottom quark B-sJ(0)(5832). Experimental searches of other members especially those exotic ones are strongly called for.

引用

页码：094009 / 1

页数：5

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