Abstract :
[en] It is shown that the short-range part of the Goldstone boson exchange
interaction between the constituent quarks, which explains baryon
spectroscopy and the short-range repulsion in the NN system, induces a strong
short-range repulsion in the flavour-singlet state of the $S=-2$
system with $J^P=0^+$. This suggests that a deeply bound H-particle should
not exist. We compare our approach with other models employing different
hyperfine interactions between quarks in the nonperturbative regime of QCD.
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