The Pentaquarks in the Linear Molecular Heptaquark Model

Abstract

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. An additional quark-antiquark pair is then considered, and this is suggested to produce linear molecular system, with a narrow decay width. The quarks assemble in three hadronic clusters, and the central hadron provides stability. The possible crypto-heptaquark hadrons with exotic pentaquark flavours, with strange, charmed and bottomed quarks, are predicted.

6 pages, 3 tables, talk presented as the Eighth Workshop on Non-Perturbative Quantum Chromodynamics 7-11 June 2004, Paris, proceedings edited by B. Muller, Chung-I Tan and Y. Gabellini