Hadron-Hadron Interactions from Lattice QCD: Theory meets Experiments

TL;DR

This paper reviews recent advances in lattice QCD studies of hadron-hadron interactions near physical pion mass, emphasizing the HAL QCD method and its experimental connections, with focus on key interaction channels and the two-pion exchange mechanism.

Contribution

It provides a comprehensive overview of how lattice QCD techniques, especially the HAL QCD method, are used to understand hadron interactions and their experimental relevance.

Findings

Successful application of HAL QCD method near physical pion mass.

Insights into the two-pion exchange mechanism in hadron interactions.

Connection established between lattice results and experimental data.

Abstract

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 the HAL QCD method 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.