Baryon-Baryon Interactions in the Flavor SU(3) Limit from Full QCD Simulations on the Lattice

Details Baryon-Baryon Interactions in the Flavor SU(3) Limit from Full QCD Simulations on the Lattice Baryon-Baryon Interactions in the Flavor SU(3) Limit from Full QCD Simulations on the Lattice

2010-07-21

arxiv.org/abs/1007.3559v1

Prog.Theor.Phys.124:591-603,2010

Physics

High Energy Physics

High Energy Physics - Lattice

16 pages, 4 figures, ptptex.cls used

Scientific paper

10.1143/PTP.124.591

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 a relation of such flavor-spin dependence with the Pauli exclusion principle in the quark level. Possible existence of an H-dibaryon resonance above the Lambda-Lambda threshold is also discussed.

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