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Abstract: We investigate baryon-baryon BB interactions in the 3-flavor full QCDsimulations with degenerate quark masses for all flavors. The BB potentials inthe orbital S-wave are extracted from the Nambu-Bethe-Salpeter wave functionsmeasured on the lattice. We observe strong flavor-spin dependences of the BBpotentials at short distances. In particular, a strong repulsive core exists inthe flavor-octet and spin-singlet channelthe 8 s representation, while anattractive core appears in the flavor singlet channel the 1 representation.We discuss the relation of such flavor-spin dependence with the Pauli exclusionprinciple at the quark level. The possible existence of an H-dibaryon resonanceabove the Lambda-Lambda threshold is also discussed.



Autor: Takashi Inoue, for HAL QCD Collaboration

Fuente: https://arxiv.org/







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