Relativistic calculation of the width of the Θ+(1540) pentaquark -: art. no. 068203

被引：0
作者：
Li, H [1 ]
Shakin, CM
Li, XD
机构：
[1] CUNY Brooklyn Coll, Dept Phys, Brooklyn, NY 11210 USA
[2] CUNY, New York City Coll Technol, Dept Comp Syst Technol, Brooklyn, NY 11201 USA
来源：
PHYSICAL REVIEW C | 2005年 / 71卷 / 06期
关键词：
D O I：
10.1103/PhysRevC.71.068203
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We calculate the width of the Theta(+)(1540) pentaquark in a relativistic model in which the pentaquark is considered to be composed of a scalar diquark and a spin 1/2 triquark. We consider both positive and negative parity for the pentaquark. There is a single parameter in our model which we vary and which describes the size of the pentaquark. If the pentaquark size is somewhat smaller than that of the nucleon, we find quite small widths for the pentaquark of about 1 MeV or less. Our model of confinement plays an important role in our analysis and makes it possible to use Feynman diagrams to describe the decay of the pentaquark.
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