Pentaquark Θ+, constituent quark structures, and prediction of charmed Θc0 and bottomed Θb+ -: art. no. 094029

被引：31
|
作者：
Cheung, K [1 ]
机构：
[1] Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan
[2] Natl Tsing Hua Univ, NCTS, Hsinchu, Taiwan
来源：
PHYSICAL REVIEW D | 2004年 / 69卷 / 09期
关键词：
D O I：
10.1103/PhysRevD.69.094029
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The newly observed Theta(+) resonance is believed to be a pentaquark with the constituent quarks uudd (s) over bar. There are a few options for the constituent quark structure. Some advocate diquark-diquark-antiquark (ud)-(ud)-(s) over bar while others favor diquark-triquark (ud)-(ud (s) over bar) structure. We use the color-spin hyperfine interaction to examine the energy levels of these structures, and we find that the diquark-diquark-antiquark structure is slightly favored. We proceed to write down the flavor triplet and antisextet of the charmed or bottomed exotic baryons with internal qqqq (Q) over bar quarks. We also estimate the mass of Theta(c)(0) and Theta(b)(+).
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页数：6
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