Exotic dibaryons with a heavy antiquark

Abstract

We discuss the possible existence of exotic dibaryons with a heavy antiquark, being realized three-body systems, Dbar^(*)NN and B^(*)NN. These are genuinely exotic states with no quark-antiquark annihilation. We consider the heavy quark spin and chiral symmetries, and introduce the one pion exchange potential between a Dbar^(*) (B^(*)) meson and a nucleon N. As for the NN interaction, we employ the Argonne v^\prime_8 potential. By solving the coupled-channel equations for PNN and P^* NN (P^(*)=Dbar^(*) and B^(*)), we find bound states for (I,J^P)=(1/2,0^-) as well as resonant states for (I,J^P)=(1/2,1^-) both in Dbar^(*)NN and B^(*)NN systems. We also discuss the heavy quark limit, and find that the spin degeneracy is realized in the bound states with (I,J^P)=(1/2,0^-) and (1/2,1^-).

4 pages, 1 figure

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Cited by in corpus (15)

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• Kondo effect in charm/bottom nuclei
• Kondo effect of ${\bar{D}}_s$ and ${\bar{D}}_s^{\ast }$ mesons in nuclear matter
• Double-charm heptaquark states composed of two charmed mesons and one nucleon
• Spin-isospin Kondo effects for ${\Sigma }_c$ and ${\Sigma }_c^{\ast }$ baryons and $\bar{D}$ and ${\bar{D}}^{\ast }$ mesons
• Formation spectra of charmed meson--nucleus systems using an antiproton beam
• Spectroscopy of heavy baryons with breaking of heavy-quark symmetry
• Open charm and bottom meson-nucleon potentials à la nuclear force
• Universal physics of the few-body system of two neutrons and one flavored meson
• Mesic nuclei with a heavy antiquark
• Exotic baryons from a heavy meson and a nucleon