In high-energy collision experiments, the momentum distribution of hadron pairs reveals correlations arising from hadron interactions and quantum statistics. Traditionally, femtoscopy has been used to derive emission source information from these correlations. Recently, these techniques have also facilitated new methods to assess hadron
interactions, as exemplified by the ALICE collaboration’s significant advancements at the LHC. This talk will cover the fundamental theoretical methods for calculating momentum correlation functions and discuss recent applications to antikaon-nucleon systems and hypernuclei, with a look toward future research at J-PARC.

References:
[1] S. Cho et al., ExHIC collaboration, Prog. Part. Nucl. Phys. 95, 279 (2017).
[2] Y. Kamiya, T. Hyodo, K. Morita, A. Ohnishi, W. Weise, Phys. Rev. Lett. 124, 132501 (2020).
[3] A. Jinno, Y. Kamiya, T. Hyodo, A. Ohnishi, arXiv:2403.09126 [nucl-th]