Θ++ from the QCD sum rule -: art. no. 016001

被引：9

作者：

Nishikawa, T

Kanada-En'Yo, Y

Morimatsu, O

Kondo, Y

机构：

[1] High Energy Accelerator Res Org, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 3050801, Japan

[2] Kokugakuin Univ, Tokyo 1508440, Japan

来源：

PHYSICAL REVIEW D | 2005年 / 71卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.71.016001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the pentaquark uudd (s) over bar with J=3/2 and I=1 (Theta(++)) in the QCD sum rule approach. We derive the QCD sum rules for positive and negative parity states of the pentaquark. The QCD sum rule predicts that there exists Theta(++) with negative parity and its mass is 1.5similar to1.6 GeV. The negative parity Theta(++) can be extremely narrow, since it lies much below the DeltaK threshold and the decay into NK state is strongly suppressed due to the D-wave centrifugal barrier. Also, the possibility of the existence of the Theta(++) with positive parity is not excluded. Although it nearly degenerates with the negative parity state, it may be broader than the negative parity state.

引用

页码：016001 / 1

页数：6

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