From Tetraquark to Hexaquark: A Systematic Study of Heavy Exotics in the Large $N_c$ Limit

Abstract

A systematic study of multiquark exotics with one or $N_c-1$ heavy quarks in the large $N_c$ limit is presented. By binding a chiral soliton to a heavy meson, either a normal $N_c$-quark baryon or an exotic $(N_c+2)$-quark baryon is 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 are just the normal triquark baryon $Qqq$, the exotic pentaquark baryon $Q\bar{q}\bar{q}\bar{q}\bar{q}$, tetraquark di-meson $\bar{Q}\bar{Q}qq$ and the hexaquark di-baryon $\bar{Q}\bar{Q}\bar{q}\bar{q}barq\bar{q}$ respectively. Their stabilities and decays are also discussed. In particular, it is shown that the ``heavy to heavy'' semileptonic decays are described by the Isgur--Wise form factors of the normal baryons.

14 pages in REVTeX, no Figures

References in corpus (8)

• Exotic QQ\qbar\qbar States in QCD
• The Baryon Isgur-Wise Function in the Large $N_c$ Limit
• Properties of Baryons Containing a Heavy Quark in the Skyrme Model
• Baryons Containing a Heavy Quark as Solitons
• Pentaquark Exotic Baryons in the Skyrme Model
• New Universality of Baryon Isgur--Wise Form Factor in the Large $N_c$ limit
• Search for Flavoured Multiquarks in a Simple Bag Model
• Semileptonic Decays of Heavy Tetraquarks

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• The static tetraquark and pentaquark potentials
• Strong Decay of $P_c(4380)$ Pentaquark in a Molecular Picture
• Hidden Bottom Pentaquark States with Spin 3/2 and 5/2
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• Iterative method to compute the Fermat points and Fermat distances of multiquarks
• Masses and Magnetic Moments of Doubly Heavy Tetraquarks via Diffusion Monte Carlo Method
• Search for a strongly decaying neutral charmed pentaquark
• Tetraquarks in holographic QCD
• Charmed Strange Pentaquarks in the Large $N_c$ Limit