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A systematic study of multiquark exotics with one or $N_c-1$ heavy quarks inthe large $N_c$ limit is presented. By binding a chiral soliton to a heavymeson, either a normal $N_c$-quark baryon or an exotic $(N_c+2)$-quark baryonis obtained. By replacing the heavy quark with $N_c-1$ heavy antiquarks, exotic$(2N_c-2)$-quark and $2N_c$-quark mesons are obtained. When $N_c = 3$, they arejust the normal triquark baryon $Qqq$, the exotic pentaquark baryon $Q\barq\bar q\bar q\bar q$, tetraquark di-meson $\bar Q \bar Q qq$ and the hexaquarkdi-baryon $\bar Q \bar Q \bar q \bar q\ bar q \bar q$ respectively. Theirstabilities and decays are also discussed. In particular, it is shown that the``heavy to heavy'' semileptonic decays are described by the Isgur--Wise formfactors of the normal baryons.Comment: 14 pages in REVTeX, no Figure

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

From tetraquarks to hexaquarks: A systematic study of heavy exotics in the large<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="italic">N</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="italic">c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>limit

From tetraquarks to hexaquarks: A systematic study of heavy exotics in the largeNclimit