Speaker
Description
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 (BES) program at RHIC was performed to map the QCD
phase diagram. Model calculations suggest, in high energy collisions,
the transition from the hadronic matter to the deconfined state is a
smooth crossover, at lower energies, the phase transition could be first
order and there is a QCD critical point between the smooth cross-over
and the first order region. The correlation femtoscopy method allows one
to measure the space and time extent of the particle emitting source.
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 a strange quark and have smaller
cross-sections with the hot hadronic matter compared to pions, they may
provide additional information about the system evolution. The extracted
radius parameters of kaons are presented as a function of collision
centrality and transverse mass ($m_T$) and compared to those for pions.
| Topic: | Topic: Heavy Ion Collisions and Critical Phenomena |
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