Abstract
We investigate baryon-baryon interactions with the strangeness S = −2 system in 2+ 1 flavor lattice QCD, using gauge configurations provided by the CP-PACS/JLQCD Collaborations. The potential matrix is extracted by the Nambu-Bethe-Salpeter amplitudes from lattice QCD simulation through the ΛΛ, NΞ, ΣΣ and ΛΣ coupled-channel Schrodinger equation. We confirmed that qualitative features of the potential matrix are consistent with those from SU(3) symmetric calculations and effects of SU(3) breaking in baryon-baryon interactions are still small even in the situation of mπ ≃ 661MeV and mπ/mK = 0.86.
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