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arXiv · 1309.4324

Exotic dibaryons with a heavy antiquark

Yasuhiro Yamaguchi·Shigehiro Yasui·Atsushi Hosaka
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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^-).

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Yasuhiro Yamaguchi, Shigehiro Yasui, Atsushi Hosaka. 2014-05-07. Exotic dibaryons with a heavy antiquark. https://doi.org/10.1016/j.nuclphysa.2014.04.002

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