Speaker
Description
The production of short lived resonances like $K^{*0}$ provides a unique opportunity to probe the hadronic phase formed in heavy-ion collisions. Due to its short lifetime the decay daughters may interact with the medium which may lead to a change in the properties of the resonances. The decay particles may undergo rescattering and re-generation effects. Hence $K^{*0}/K$ provides a unique tool to investigate the interplay of re-scattering and regeneration effects in the hadronic phase of heavy-ion collisions. Recently STAR has completed the BES-II run resulting in high statistics Au+Au data with improved detectors and wider pseudorapidity coverage. This will help us to extend the measurement in both lower and higher $p_{T}$ range with less statistical uncertainty than that in BES-I.
We will report mass, width, and invariant yields of $K^{*0}$ using the 14.6 and 19.6 GeV BES-II data. The average transverse momentum of $K^{*0}$ will be shown and compared with other hadrons. The nuclear modification factor of $K^{*0}$ will be shown. The resonance to non-resonance ratio will be shown as a function of centrality to study the rescattering/regeneration effects. Measurement of the hadronic phase lifetime will be shown as a function of centrality and will be compared with other RHIC and LHC energies.
| Present via | Online |
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