Hadron-Hadron Interactions from Lattice QCD: Theory meets Experiments

We summarize recent developments in the study of hadron hadron interactions using lattice QCD near the physical pion mass ($𝑚_\pi \simeq$ 146 MeV), based on theHALQCDmethod and its connection to experimental data. In particular, we focus on several key interaction channels shown below. Also, we examine the two-pion exchange (TPE) mechanism, which governs the long-range behavior of interactions between flavor-singlet hadrons, as well as between nucleons and flavor-singlet hadrons.