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arXiv · 1007.3559

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

Takashi Inoue·Noriyoshi Ishii·Sinya Aoki·Takumi Doi·Tetsuo Hatsuda·Yoichi Ikeda·Keiko Murano·Hidekatsu Nemura·Kenji Sasaki
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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 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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Takashi Inoue, Noriyoshi Ishii, Sinya Aoki, Takumi Doi, Tetsuo Hatsuda, Yoichi Ikeda, Keiko Murano, Hidekatsu Nemura, Kenji Sasaki. 2010-07-21. Baryon-Baryon Interactions in the Flavor SU(3) Limit from Full QCD Simulations on the Lattice. https://doi.org/10.1143/ptp.124.591

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