Hyperon-nucleon interaction from lattice QCD at (mπ, mK) ≈ (146, 525) MeV

• Published in: AIP conference proceedings Vol. 2130; no. 1
• Main Author: Nemura, Hidekatsu
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Melville American Institute of Physics 25.07.2019
• Subjects: Baryons; Mathematical analysis; Nuclear physics; Quantum chromodynamics; Strangeness; Tensors
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.5118402

Comprehensive study of generalized baryon-baryon (BB) interaction including strangeness is one of the important subject of nuclear physics. In order to obtain a complete set of isospin-base baryon interactions, we perform a large scale lattice QCD calculation with almost physical quark masses corresponding to (mπ, mK) ≈ (146, 525) MeV and large volume (La)4 = (96a)4 ≈ (8.1 fm)4. A large number of Nambu-Bethe-Salpeter (NBS) correlation functions from nucleon-nucleon (NN) to ΞΞ are calculated simultaneously. In this contribution, we focus on the strangeness S = −1 channels of the hyperon interactions by means of HAL QCD method. Three potentials ((i) the 1S0 central, (ii) the 3S1 −3D1 central, and (iii) 3S1 −3D1 tensor potentials) are presented for four isospin components; (1) the ΣN − ΣN (the isospin I = 3/2) diagonal, (2) the ΛN − ΛN diagonal, (3) the ΛN → ΣN transition, and (4) the ΣN − ΣN (I = 1/2) diagonal. Scattering phase shifts for ΣN (I = 3/2) system are presented.