Strangeness in Quark Matter 2022 (SQM 2022)

Production of K∗0 in Au+Au collisions at sNN=14.6 and 19.6 GeV in BES-II from STAR

14 Jun 2022, 11:50

20m

Sydney

Talk Resonances and Hyper-nuclei PA-Resonances and Hyper-nuclei

Speaker

Aswini Kumar Sahoo (IISER,Berhampur)

Description

The production of short lived resonances like $K^{\ast 0}$ 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 $K^{\ast 0}/K$ 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 $K^{\ast 0}$ using the 14.6 and 19.6 GeV BES-II data. The average transverse momentum of $K^{\ast 0}$ will be shown and compared with other hadrons. The nuclear modification factor of $K^{\ast 0}$ 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.

Presentation materials

SQM22_Aswini_v6.pdf