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
收藏
页码:094009 / 1
页数:5
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