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arXiv · 1011.1695

Flavor structure of the baryon-baryon interaction from lattice QCD

Takashi Inoue·for HAL QCD Collaboration
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Abstract

We investigate baryon-baryon (BB) interactions in the 3-flavor full QCD simulations with degenerate quark masses for all flavors. The BB potentials in the orbital S-wave are extracted from the Nambu-Bethe-Salpeter wave functions measured on the lattice. We observe strong flavor-spin dependences of the BB potentials at short distances. In particular, a strong repulsive core exists in the flavor-octet and spin-singlet channel(the 8_s representation), while an attractive core appears in the flavor singlet channel (the 1 representation). We discuss the relation of such flavor-spin dependence with the Pauli exclusion principle at the quark level. The possible existence of an H-dibaryon resonance above the Lambda-Lambda threshold is also discussed.

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Takashi Inoue, for HAL QCD Collaboration. 2010-11-08. Flavor structure of the baryon-baryon interaction from lattice QCD. https://arxiv.org/abs/1011.1695

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