Baryon-(anti-)baryon interaction cross-section measurement with femtoscopy technique in HIC

Interaction cross-sections for baryon pairs are of fundamental interest and they are actively investigated theoretically. They are well known for pairs of common (anti-)baryons; however, there is a lack of precise data for heavier baryons, including the ones carrying strangeness. The two-particle correlation formalism (femtoscopy) is sensitive to the interaction kernel for a pair of particles, which is related to the pair interaction cross-section. This formalism is extensively used to measure two-particle correlations in heavy-ion collisions. In particular, the collisions at RHIC and LHC produce simultaneously a large number of baryons and anti-baryons. We show how this formalism can be used to extract the cross-sections from the femtoscopic baryon-(anti-) baryon correlation functions. The analysis is complicated by the presence of the so-called "residual correlations" arising from weak decay products in the measured sample. We show how this effect can be exploited to gain further insight into the cross-sections of even heavier baryons. We discuss the limitations of the measurement technique and estimate the discovery potential of currently available and soon-to-be-collected heavy-ion collision datasets at RHIC and at the LHC.