Speaker
Description
A first-principles determination of hadron interactions is one of the most important subjects in particle, nuclear, and astrophysics. In particular, the determination of hyperon forces plays a crucial role in understanding not only the structure of hypernuclei but also the equation of state of dense matter and the internal structure of neutron stars.
In this talk, we will present lattice QCD studies of hyperon forces, including the Lambda-Lambda, N-Xi, and N-Omega interactions. Employing the HAL-conf-2023 gauge configurations generated by the HAL QCD Collaboration in (2+1)-flavor QCD at the physical point, m_pi = 137 MeV, we calculate four-point correlation functions using the supercomputer Fugaku and extract the interaction potentials and scattering parameters by the HAL QCD method. The fate of exotic dibaryons will be discussed, and comparisons with experiments will also be presented.