Could $Z_c(4025)$ be a $J^P=1^{+}$ $D^{\ast }\overline{D^{\ast }}$ molecular state?

Abstract

We investigate whether the newly observed narrow resonance $Z_c(4025)$ can be described as a $D^{\ast }\overline{D^{\ast }}$ molecular state with quantum numbers $J^P=1^{+}$. Using QCD sum rules, we consider contributions up to dimension six in the operator product expansion and work at leading order of ${\alpha }_s$. The mass obtained for this state is $(4.05\pm 0.28) \mbox{GeV}$. It is concluded that $D^{\ast }\overline{D^{\ast }}$ molecular state is a possible candidate for $Z_c(4025)$.

7 pages, 4 figures.Published in Eur.Phys.J. C73 (2013) 2661. arXiv admin note: text overlap with arXiv:1304.1850

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• 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
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• Systematic studies of charmonium-, bottomonium-, and $B_c$-like tetraquark states
• Prediction of a $Z_c(4000)$ $D^{\ast }{\bar{D}}^{\ast }$ state and relationship to the claimed $Z_c(4025)$
• Updated Cross Section Measurement of $e^{+}{e}^{-}\to K^{+}{K}^{-}J/\psi$ and $K_S^0{K}_S^{0}J/\psi$ via Initial State Radiation at Belle
• Selected strong decay modes of Y(4260)
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• Molecular Interpretation of the Supercharmonium State Z(4475)
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• Molecular states with hidden charm and strange in QCD Sum Rules
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• Analysis of the tetraquark and hexaquark molecular states with the QCD sum rules
• Charged charmoniumlike structures in the $e^{+}{e}^{-}\to \psi (3686){\pi }^{+}{\pi }^{-}$ process based on the ISPE mechanism
• Regge Trajectories of Exotic Hadrons in the Flux Tube Model
• Masses of tetraquark states in the hidden charm sector above $D-D^{\ast }$ threshold
• Mixing of X and Y states from QCD Sum Rules analysis
• X, Y and Z States