Exotic pentaquarks, crypto-heptaquarks and linear three-hadronic molecules

Details Exotic pentaquarks, crypto-heptaquarks and linear three-hadronic molecules Exotic pentaquarks, crypto-heptaquarks and linear three-hadronic molecules

2004-10-06

arxiv.org/abs/hep-ph/0410097v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 3 tables, talk presented at the International Workshop PENTAQUARK04 July 20-23, 2004, SPring-8, Japan

Scientific paper

In this talk, multiquarks are studied microscopically in a standard quark model. In pure ground-state pentaquarks the short-range interaction is computed and it is shown to be repulsive, a narrow pentaquark cannot be in the groundstate. As a possible excitation, an additional quark-antiquark pair is then considered, and this is suggested to produce linear molecular system, with a narrow decay width. This excitation may be energetically favourable to the p-wave excitation suggested by the other pentaquark models. Here, the quarks assemble in three hadronic clusters, and the central hadron provides stability. The possible crypto-heptaquark hadrons with exotic pentaquark flavours are studied.

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