Comprehensive four-quark interpretation of Ds(2317), Ds(2457), and Ds(2632) -: art. no. 232001

被引：115

作者：

Chen, YQ ^{[1
]}

Li, XQ

机构：

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

[2] Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 23期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1103/PhysRevLett.93.232001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The recently observed new member of the charm-strange family D-s(2632), which has a surprisingly narrow width, is challenging our theory. D-s(2317) and D-s(2457), which were observed earlier, have similar behaviors and receive various theoretical explanations. Some authors use the heavy hadron chiral effective theory to evaluate heavy-light quark systems and obtain a reasonable evaluation on the masses of D-s(2317) and D-s(2457). An alternative picture is to interpret them as four-quark or molecular states. In this work, we are following the latter and propose a unitive description for all three new members, D-s(2632), D-s(2317), and D-s(2457), and, at least, so far our picture is consistent with the data.

引用

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