Tetraquark state candidates: $Y(4140)$, $Y(4274)$ and $X(4350)$

Abstract

In this article, we tentatively assign the $Y(4140)$, $Y(4274)$ and $X(4350)$ to be the scalar and tensor $cs\bar{c}\bar{s}$ tetraquark states, respectively, and study them with the QCD sum rules. In the operator product expansion, we take into account the vacuum condensates up to dimension-10. In calculations, we use the formula $\mu =\sqrt{M_{X/Y/Z}^2-(2{\mathbb{M}}_c{)}^2}$ to determine the energy scales of the QCD spectral densities. The numerical results favor assigning the $Y(4140)$ to be the $J^{PC}=2^{++}$ diquark-antidiquark type tetraquark state, and disfavor assigning the $Y(4274)$ and $X(4350)$ to be the $0^{++}$ or $2^{++}$ tetraquark states.

arXiv comment15 pages, 12 figures. arXiv admin note: substantial text overlap with arXiv:1312.1537, arXiv:1403.0810; text overlap with arXiv:1502.00279

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• A QCD sum rule calculation for the Y(4140) narrow structure
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• Experimental Review of Structures in the $J/\psi \varphi$ Mass Spectrum
• Understanding Y(4274) and X(4320) in the $J/\psi \varphi$ invariant mass spectrum
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• Non-Standard Heavy Mesons and Baryons, an Experimental Review
• Exotics: Heavy Pentaquarks and Tetraquarks
• Observation of $J/\psi \varphi$ structures consistent with exotic states from amplitude analysis of $B^{+}\to J/\psi \varphi K^{+}$ decays
• Analysis of the $P_c(4380)$ and $P_c(4450)$ as pentaquark states in the diquark model with QCD sum rules
• Amplitude analysis of $B^{+}\to J/\psi \varphi K^{+}$ decays
• Analysis of the $P_c(4312)$, $P_c(4440)$, $P_c(4457)$ and related hidden-charm pentaquark states with QCD sum rules
• Tetraquark state candidates: $Y(4260)$, $Y(4360)$, $Y(4660)$ and $Z_c(4020/4025)$
• ${\chi }_{c0}^{}(3915)$ As the Lightest $c\bar{c}s\bar{s}$ State
• Analysis of the ${\frac{1}{2}}^{\pm }$ pentaquark states in the diquark model with QCD sum rules
• Analysis of the doubly heavy baryon states and pentaquark states with QCD sum rules
• The $X(4140)$, $X(4274)$, $X(4500)$ and $X(4700)$ in the relativized quark model
• Analysis of the $P_{cs}(4459)$ as the hidden-charm pentaquark state with QCD sum rules
• Spectroscopy and Decay properties of the charmonium
• Analysis of the $Z_c(4200)$ as axial-vector molecule-like state
• Canonical description of the new LHCb resonances
• Scalar tetraquark state candidates: $X(3915)$, $X(4500)$ and $X(4700)$
• Spectrum of the Hidden-Bottom and the Hidden-Charm/Strange Exotics in the Dynamical Diquark Model
• Analysis of the $Z_{cs}(3985)$ as the axialvector tetraquark state
• Analysis of the mass and width of the $Y(4274)$ as axialvector molecule-like state
• Landau equation and QCD sum rules for the tetraquark molecular states
• Analysis of the mass and width of the $X(4140)$ as axialvector tetraquark state
• How to understand the underlying structures of $X(4140)$, $X(4274)$, $X(4500)$ and $X(4700)$
• Lowest vector tetraquark states: $Y(4260/4220)$ or $Z_c(4100)$
• Analysis of the hidden-charm pentaquark molecular states with strangeness and without strangeness via the QCD sum rules
• Analysis of the $\bar{D}{\Sigma }_c$, $\bar{D}{\Sigma }_c^{\ast }$, ${\bar{D}}^{\ast }{\Sigma }_c$ and ${\bar{D}}^{\ast }{\Sigma }_c^{\ast }$ pentaquark molecular states with QCD sum rules
• Analysis of the $B^{+}\to J/\psi \varphi K^{+}$ data at low $J/\psi \varphi$ invariant masses and the $X(4140)$ and $X(4160)$ resonances
• Analysis of the vector tetraquark states with P-waves between the diquarks and antidiquarks via the QCD sum rules
• Triply-charmed dibaryon states or two-baryon scattering states from the QCD sum rules?
• The hadronic coupling constants of the lowest hidden-charm pentaquark state with the QCD sum rules in rigorous quark-hadron duality
• Threshold effects as the origin of $Z_{cs}(4000)$, $Z_{cs}(4220)$ and $X(4700)$ observed in $B^{+}\to J/\psi \varphi K^{+}$
• Searching for charmoniumlike states with hidden $s\bar{s}$
• Reanalysis of the $X(4140)$ as axialvector tetraquark state with QCD sum rules
• Analysis of the ${\Lambda }_c(2625)$ and ${\Xi }_c(2815)$ with QCD sum rules
• Charmonium spectrum with a Dirac potential model in the momentum space
• Analysis of the tetraquark and hexaquark molecular states with the QCD sum rules
• Triply-charmed hexaquark states with the QCD sum rules
• Scalar hidden-charm tetraquark states with QCD sum rules
• Exploratory study of X(4140) in QCD sum rules
• $X(3960)$, $X_0(4140)$, and other compact $cs\bar{c}\bar{s}$ states
• Analysis of the tensor-tensor type scalar tetraquark states with QCD sum rules
• Production of $X_{cs\bar{c}\bar{s}}$ in heavy ion collisions
• The scalar and pseudoscalar hidden-charm tetraquark states with QCD sum rules