Bound H-dibaryon in Flavor SU(3) Limit of Lattice QCD

Takashi Inoue , Noriyoshi Ishii , Sinya Aoki , Takumi Doi , Tetsuo Hatsuda , Yoichi Ikeda , Keiko Murano , Hidekatsu Nemura

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Kenji Sasaki (HAL QCD collaboration)

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classification ✦ hep-lat hep-exhep-phnucl-exnucl-th

keywords h-dibaryonlatticeboundflavor-singletpotentialapproachbaryonbaryon-baryon

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The flavor-singlet H-dibaryon, which has strangeness -2 and baryon number 2, is studied by the approach recently developed for the baryon-baryon interactions in lattice QCD. The flavor-singlet central potential is derived from the spatial and imaginary-time dependence of the Nambu-Bethe-Salpeter wave function measured in N_f=3 full QCD simulations with the lattice size of L = 2, 3, 4 fm. The potential is found to be insensitive to the volume, and it leads to a bound H-dibaryon with the binding energy of 30 - 40 MeV for the pseudo-scalar meson mass of 673 - 1015 MeV.

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Bound H-dibaryon in Flavor SU(3) Limit of Lattice QCD

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