HEAVY-FLAVOR PENTAQUARKS IN A CHIRAL CONSTITUENT QUARK-MODEL

Within the chiral constituent quark model of Glozman and Risks and its further developments, we discuss the stability of heavy pentaquarks, i.e. hadrons containing four light quarks and a heavy antiquark. The s pin-dependent part of the Hamiltonian is dominated by the short-range part of the Goldstone-boson-exchange interaction. We find that these s ystems are not bound, having an energy above the lowest dissociation t hreshold into a baryon and a meson. (C) 1998 Elsevier Science B.V. All rights reserved.