Baryon interactions from lattice QCD with physical masses — strangeness S = -1 sector —
Research Centre for Nuclear Physics, Osaka University, Osaka, 567-0047, Japan
2 Theoretical Research Division, Nishina Centre, RIKEN, Saitama, 351-0198, Japan
3 Centre for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto, 606-8502, Japan
4 Centre for Computational Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
5 iTHEMS Program and iTHES Research Group, RIKEN, Saitama, 351-0198, Japan
6 Nihon University, College of Bioresource Sciences, Kanagawa 252-0880, Japan
* Speaker, e-mail: firstname.lastname@example.org
Published online: 26 March 2018
We present our recent results of baryon interactions with strangeness S = −1 based on Nambu-Bethe-Salpeter (NBS) correlation functions calculated fromlattice QCD with almost physical quark masses corresponding to (mk,mk) ≈ (146, 525) MeV and large volume (La)4 ≈ (96a)4 ≈ (8.1 fm)4. In order to perform a comprehensive study of baryon interactions, a large number of NBS correlation functions from NN to ΞΞ are calculated simultaneously by using large scale computer resources. In this contribution, we focus on the strangeness S = −1 channels of the hyperon interactions by means of HAL QCD method. Four sets of three potentials (the 3S1 − 3 D1 central, 3S1 − 3 D1 tensor, and the 1S0 central potentials) are presented for the ∑N − ∑N (the isospin I = 3/2) diagonal, the ∧N − ∧N diagonal, the ∧N → ∑N transition, and the ∑N − ∑N (I = 1/2) diagonal interactions. Scattering phase shifts for ∑N (I = 3/2) system are presented.
© The Authors, published by EDP Sciences, 2018
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