Singly heavy tetraquark resonant states with multiple strange quarks

Abstract

We systematically investigate the S-wave singly heavy tetraquark systems containing two or three strange quarks, $Qs\bar{s}\bar{s}$, $Qn\bar{s}\bar{s}$ and $Qs\bar{s}\bar{n}\left(Q=c,b,n=u,d\right)$, within the constituent quark potential model. We solve the four-body Schrödinger equation using the Gaussian expansion method (GEM) and identify resonances via the complex scaling method (CSM). There are no bound states below the lowest two-meson thresholds. We obtain several compact resonances with $J^P=0^{+},2^{+}$ in $Qs\bar{s}\bar{s}$, and $J^P=2^{+}$ in $Qn\bar{s}\bar{s}$ and $Qs\bar{s}\bar{n}$. The pole positions are mainly distributed around $7.0-7.2$ GeV (bottom) and $3.7-3.9$ GeV (charm), with widths from a few to several tens of MeV. These resonances decay into $D_s{\eta }^{\prime },D_{(s)}^{\ast }\varphi ,{D_s}^{\ast }{K}^{\ast }$ and $D_s^{\ast }{\bar{K}}^{\ast }$ (and their bottom counterparts), providing targets for future experimental searches.

10 pages, 4 figures, 5 tables, comments are welcome