The Uniqueness of the Θ+ Pentaquark
P. J. Mulders, P. Jimenez Delgado
Abstract
The existence of the Θ+ pentaquark requires a peculiar mechanism to explain its stability. Looking at quark clusters, notably diquark and triquark configurations, such a mechanism may be found in the color-magnetic interaction between quarks. It is possible to understand why the Θ+ is unique. Chiral dynamics, in particular the ease of pion emission, will render other members of the same flavor antidecuplet, such as the Ξ-- very unstable.
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