In high-energy heavy-ion collisions, a hot and dense strongly
interacting system of deconfined quarks and gluons (sQGP) is created.
The Beam Energy Scan program at RHIC was performed to map the QCD phase
diagram. Femtoscopy allows one to measure the space-time extent of the
particle emitting source created in heavy-ion collisions. In this talk,
we present preliminary results of the measurement of like-sign two-pion
and two-kaon correlations from the BES program at STAR.
Since kaons contain strange quark and have smaller cross-sections,
compared to that of pions, with hadronic matter,
they may provide additional information about the system evolution.
The extracted Bertsch-Pratt radius parameters of kaons are studied as a
function of collision centrality and transverse mass ($m_T$) of the
particles and compared to those of pions.
|List of tracks||Femtoscopy at RHIC and LHC: links to QGP physics|