$\phi$-meson production in Au + Au collisions at $\sqrt{s_{_{\rm NN}}}$ = 3 GeV from STAR

The $\phi$-meson is the lightest bound state of strange quarks($s\overline{s}$). It has a relatively small hadronic interaction cross-section, therefore $\phi$-meson is considered to be a sensitive probe of the earlier dynamics in the heavy-ion collision. Recent measurements by HADES and FOPI on subthreshold $\phi$-meson production show a larger $\phi/K^{-}$ ratio compared to the results at higher energies[1,2], and this larger $\phi/K^{-}$ ratio cannot be described by thermal model calculations with Grand Canonical Ensemble for strangeness. In this presentation, we will report on our first measurements of $\phi$-meson production in Au+Au collisions at $\sqrt{s_{_{\rm NN}}}$ = 3$\ $GeV of energy just above the NN threshold. The data were taken in 2018 by the STAR experiment with Fixed Target configuration. $\phi$-mesons are measured through their hadronic decay channel, $\phi\rightarrow K^-+K^+$. After being corrected for the detector acceptance and tracking efficiencies, invariant yields and directed flow of $\phi$-mesons as well as $\phi/K^{-}$ ratio are presented in several centrality intervals and the results will be compared to model calculations. [1], HADES, Phys. Let. B 778, (2018) 403-407. [2], FOPI, Eur. Phys. J. A 52, (2016) 177.