Triquark-Diquark Models of a theta (1540).

Dudek, J.

Technical Information Center Oak Ridge Tennessee

关键词: Quark models;    Decay;    Baryons;    Excitation energy;    Hadrons;   

RP-ID  :  DE2005836062

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The enhancement in the flavor exotic NK channel seen by a number of experiments has been interpreted as a resonant pentaquark state, the (Theta)(sup +)(1540). Theoretical efforts to understand its structure, with the aim of explaining both the low mass and small decay width, have thrown up the possibility of a triquark-diquark P-wave correlation. We will discuss the constituent quark model study of Karliner/Lipkin and suggest that their P-wave excitation energy is an under estimate, a more plausible value raising the (Theta) mass in this model to more than 1700 MeV. We also propose on rather general grounds that these correlated quark models give rise to not only exotic baryon states, but also exotic meson states, in particular the strangeness +2, isoscalar (var-theta)(sup +) which will decay to K(sup +) K(sup 0).