We present the lattice QCD studies for baryon-baryon interactions for the first time with (almost) physical quark masses. Nf = 2+1 gauge configurations are generated with the Iwasaki gauge action and nonperturbatively O(a)-improved Wilson quark action with stout smearing on the lat-Tice of (96a)4 ≃ (8:2fm)4 with a ≃ 0:085 fm, where mπ ≃ 146 MeV and mk ≃ 525 MeV. Baryon forces are calculated from Nambu-Bethe-Salpeter (NBS) correlation functions using the time- dependent HAL QCD method. In this report, we first give the general overview of the theoretical frameworks essential to the physical point calculation of baryon forces. We then present the nu- merical results for the two-nucleon central and tensor forces in 3S1-3D1 coupled channel and the central force in 1S0 channel. In particular, a clear signal is obtained for the tensor force.
|ジャーナル||Proceedings of Science|
|出版ステータス||出版済み - 2015|
|イベント||33rd International Symposium on Lattice Field Theory, LATTICE 2015 - Kobe, 日本|
継続期間: 7月 14 2015 → 7月 18 2015
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