Lambda-Nucleon and Sigma-Nucleon interactions from lattice QCD with physical masses

Understand

We present our recent study on baryon-baryon ($BB$) interactions from lattice QCD with almost physical quark masses corresponding to $(m_\pi,m_K)\approx(146,525)$ MeV and large volume $(La)^4=(96a)^4\approx$ (8.1 fm)$^4$.

• In order to perform a comprehensive study of $BB$ interactions based on lattice QCD calculation with almost physical masses and to make better use of such large scale computer resources, a large number of $BB$ interactions from $NN$ to $\Xi\Xi$ are calculated simultaneously.
• In this report, we focus on the strangeness $S=-1$ channels of the hyperon interactions by means of HAL QCD method.
• The coupled-channel HAL QCD method is briefly outlined.