Nature of the vector resonance $Y(2175)$

Spectroscopic parameters and decay channels of the vector resonance $Y(2175)$ are studied by considering it as a diquark-antidiquark state with the quark content $su\bar{s}\bar{u}$. The mass and coupling of the tetraquark $Y(2175)$ are calculated using the QCD two-point sum rules by taking into account various quark, gluon and mixed condensates up to dimension 15. Partial widths of its strong decays to $\varphi f_0(980)$, $\varphi \eta$, and $\phi \eta^{\prime}$arecomputedaswell\mathrm{.}Tothisend,weexplorethevertices$Y\phi f_{0}(980)$,$Y\phi \eta$,and$Y\phi \eta^{\prime}$, and calculate the corresponding strong couplings by means of the QCD light-cone sum rule method. The coupling $G_{Y\varphi f}$ of the vertex $Y\varphi f_0(980)$ is found using the full version of this method, and by treating the scalar meson $f_0(980)$ as a diquark-antidiquark tetraquark state. The couplings $g_{Y\varphi \eta }$ and $g_{Y\varphi {\eta }^{\mathrm{\prime }}}$, however, are calculated by applying the soft-meson approximation to the light-cone sum rule method. Prediction for the mass of the resonance $m_Y=(2173\pm 85)\mathrm{M}\mathrm{e}\mathrm{V}$ is in excellent agreement with the data of the BaBar Collaboration \cite{Aubert:2006bu}, and within errors of calculations is compatible with the result reported by BESIII \cite {Ablikim:2014pfc}. The full width $\Gamma _{$\mathrm{f}\mathrm{u}\mathrm{l}\mathrm{l}$}=(91.1\pm 20.5)~ $\mathrm{M}\mathrm{e}\mathrm{V}$$ofthe$Y(2175)$ saturated by its three strong decay channels is in a reasonable agreement with existing experimental data.