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arXiv · 2209.04863

Production yield and azimuthal anisotropy measurements of strange hadrons from BES at STAR

Aswini Kumar Sahoo
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Abstract

We report the production and azimuthal anisotropy measurements of strange and multi-strange hadrons at STAR BES energies. The $\Lambda/K^0_s$ ratio is reported at 3 GeV and observed to increase faster with transverse momentum than that at higher energies. The number-of-constituent quark (NCQ) scaling of $v_2$ has been studied at 19.6 GeV (BES-II). The NCQ scaling holds for particles and anti-particles, which can be considered as an evidence of partonic collectivity. The production of $K^{*0}$ resonance is also reported for 7.7-39 GeV (BES-I) and the $K^{*0}/K$ ratio suggests that hadronic re-scattering dominates over regeneration in central A+A collisions. Using the $K^{*0}/K$ ratio, we also report the lower limit of hadronic phase lifetime $( t_{kin} - t_{chem} )$.

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Aswini Kumar Sahoo. 2022-09-11. Production yield and azimuthal anisotropy measurements of strange hadrons from BES at STAR. https://doi.org/10.5506/aphyspolbsupp.16.1-a132

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