Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2010-11-08
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 4 figures, Talk given at the XXVIII International Symposium on Lattice Field Theory (Lattice 2010), Villasimius, Ital
Scientific paper
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.
for HAL QCD Collaboration
Inoue Takashi
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