$D^{\ast }{\bar{D}}^{\ast }$ molecule interpretation of $Z_c(4025)$

Abstract

We have used QCD sum rules to study the newly observed charged state $Z_c(4025)$ as a hidden-charm $D^{\ast }{\bar{D}}^{\ast }$ molecular state with the quantum numbers $I^G(J^P)=1^{+}(1^{+})$. Using a $D^{\ast }{\bar{D}}^{\ast }$ molecular interpolating current, we have calculated the two-point correlation function and the spectral density up to dimension eight at leading order in ${\alpha }_s$. The extracted mass is $m_X=(4.04\pm 0.24)$ GeV. This result is compatible with the observed mass of $Z_c(4025)$ within the errors, which implies a possible molecule interpretation of this new resonance. We also predict the mass of the corresponding hidden-bottom $B^{\ast }{\bar{B}}^{\ast }$ molecular state: $m_{Z_b}=(9.98\pm 0.21)$ GeV.

6 pages, 5 figures. Version appears in Eur. Phys. J. C

References in corpus (6)

• The Vector and Axial-Vector Charmonium-like States
• $B\to \pi \ell {\nu }_l$ Width and $|V_{ub}|$ from QCD Light-Cone Sum Rules
• Exotic $QQ\bar{q}\bar{q}$, $QQ\bar{q}\bar{s}$ and $QQ\bar{s}\bar{s}$ states
• $Z_c(4025)$ as the hadronic molecule with hidden charm
• Possible $J^{PC}=0^{--}$ Charmonium-like State
• The Possible J^{PC}=0^{--} Exotic State

Cited by in corpus (26)

• The hidden-charm pentaquark and tetraquark states
• Pentaquark and Tetraquark states
• Reanalysis of the $Y(3940)$, $Y(4140)$, $Z_c(4020)$, $Z_c(4025)$ and $Z_b(10650)$ as molecular states with QCD sum rules
• Analysis of the $Z_c(4020)$, $Z_c(4025)$, $Y(4360)$ and $Y(4660)$ as vector tetraquark states with QCD sum rules
• QCD Sum Rules Approach to the $X,Y$ and $Z$ States
• Mass spectra of Zc and Zb exotic states as hadron molecules
• Interpreting $Z_c(3900)$ and $Z_c(4025)/Z_c(4020)$ as charged tetraquark states
• Exotic open-flavor $bc\bar{q}\bar{q}$, $bc\bar{s}\bar{s}$ and $qc\bar{q}\bar{b}$, $sc\bar{s}\bar{b}$ tetraquark states
• Systematic studies of charmonium-, bottomonium-, and $B_c$-like tetraquark states
• Hidden-Charm Tetraquarks and Charged Zc States
• Prediction of a $Z_c(4000)$ $D^{\ast }{\bar{D}}^{\ast }$ state and relationship to the claimed $Z_c(4025)$
• Resolving the puzzling decay patterns of charged $Z_c$ and $Z_b$ states
• Low-energy Scattering of $(D^{\ast }{\bar{D}}^{\ast }{)}^{\pm }$ System and the Resonance-like Structure $Z_c(4025)$
• Production of $Z_c(3900$) and $Z_c(4020)$ in $B_c$ decay
• The recoil correction and spin-orbit force for the possible $B^{\ast }{\bar{B}}^{\ast }$ and $D^{\ast }{\bar{D}}^{\ast }$ states
• Production of $Z_{cs}$ in $B$ and $B_s$ decay
• Possible hadronic molecular states composed of $S$-wave heavy-light mesons
• Understanding the ${\eta }_c\rho$ decay mode of $Z_c^{(\prime )}$ via the triangle loop mechanism
• Molecular states with hidden charm and strange in QCD Sum Rules
• The strange cousin of the $Z_c(4020/4025)$ as tetraquark state
• hidden charm decays of $X(4014)$ in a $D^{\ast }{\bar{D}}^{\ast }$ molecule scenario
• Regge Trajectories of Exotic Hadrons in the Flux Tube Model
• Masses of tetraquark states in the hidden charm sector above $D-D^{\ast }$ threshold
• Radiative decays of the neutral $Z_c(3900)$ and $Z_c(4020)$
• Mixing of X and Y states from QCD Sum Rules analysis
• X, Y and Z States