The newly observed $Z_{cs}(3985{)}^{-}$ state: in vacuum and a dense medium

Abstract

We report on some properties of the newly observed charged hidden-charmed open strange $Z_{cs}(3985{)}^{-}$ state by BESIII Collaboration. Assigning the quantum numbers $J^P=1^{+}$ and the quark composition $c\bar{c}s\bar{u}$ and considering it as the strange partner of the famous $Z_c(3900)$ state, we estimate the mass of the $Z_{cs}(3985{)}^{-}$ resonance in vacuum and compare it with the experimental data. We also investigate its mass, current coupling and vector-self energy in a medium with finite density. Our result on the mass in vacuum agrees well with the experimental data. We estimate the mass and current coupling of the b-partner of this state, $Z_{bs}$, in the vacuum as well. For its mass we get $ m_{Z_{bs}}= 10732^{+97}_{-46}~\mbox{MeV}$, which may be checked via other nonperturbative approaches as well as future experiments. We present the dependence of the spectroscopic parameters of $Z_{cs}(3985{)}^{-}$ state on density and observe that these parameters are linearly changed with increasing in the density.

11 Pages and 3 Figure

References in corpus (12)

• Observation of a resonance-like structure in the pi^+- psi' mass distribution in exclusive B-->K pi^+- psi' decays
• Observation of the resonant character of the $Z(4430{)}^{-}$ state
• Can the X(3872) be a 1^{++} four-quark state?
• Observation of a new charged charmoniumlike state in B -> J/psi K pi decays
• Excited heavy tetraquarks with hidden charm
• Four-quark exotic mesons
• Future Prospects for Hadron Physics at PANDA
• QCD sum rules study of the meson Z^+(4430)
• Analysis of the mass and width of the $X(4140)$ as axialvector tetraquark state
• Magnetic and quadrupole moments of the $Z_c(3900)$
• Tetraquark-adequate formulation of QCD sum rules
• Tetraquark-adequate QCD sum rules for quark-exchange processes

Cited by in corpus (9)

• An updated review of the new hadron states
• Is $Z_{cs}(3982)$ a molecular partner of $Z_c(3900)$ and $Z_c(4020)$ states?
• $Z_{cs}$ states from the $D_s^{\ast }{\bar{D}}^{\ast }$ and $J/\psi K^{\ast }$ coupled channels: Signal in $B^{+}\to J/\psi \varphi K^{+}$ decay
• The decay widths of the $Z_{cs}(3985/4000)$ based on rigorous quark-hadron duality
• The strange cousin of the $Z_c(4020/4025)$ as tetraquark state
• $Z_{cs}(3985)$ in next-to-leading-order chiral effective field theory -- the first truncation uncertainty analysis
• Hadronic medium effects on $Z_{cs}(3985{)}^{-}$ production in heavy-ion collisions
• Hunting for the heavy quark spin symmetry partner of $Z_{cs}$
• Spectrum of Hidden-Charm, Open-Strange Exotics in the Dynamical Diquark Model