Speaker
Description
Interaction cross-sections for baryon pairs are of fundamental interest
and they are actively investigated theoretically. They are known well for
pairs of common (anti-)baryons, however there is a lack of precise
experimental 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 [1]. The formalism is extensively used
to measure two-particle correlations in heavy-ion collisions. In
particular the collisions at RHIC and LHC produce simultaneously 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 [2]. 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.
[1] A. Kisiel, H. Zbroszczyk, M. Szymanski; "Extracting
baryon-antibaryon strong interaction potentials from p-$\Lambda$ femtoscopic
correlation functions"; Phys.Rev. C89 (2014) 5, 054916
[2] R. Lednicky, V.L. Lyuboshits; "Final State Interaction Effect on
Pairing Correlations Between Particles with Small Relative Momenta";
Sov.J.Nucl.Phys. 35 (1982) 770, Yad.Fiz. 35 (1981) 1316-1330
