Canonical description of the new LHCb resonances

Abstract

The LHCb Collaboration has recently observed four $J/\psi \varphi$ structures called $X(4140)$, $X(4274)$, $X(4500)$ and $X(4700)$ in the $B^{+}\to J/\psi \varphi K^{+}$ decays. We study them herein using a nonrelativistic constituent quark model in which the degrees of freedom are quark-antiquark and meson-meson components. The $X(4140)$ resonance appears as a cusp in the $J/\psi \varphi$ channel due to the near coincidence of the $D_s^{\pm }{D}_s^{\ast \pm }$ and $J/\psi \varphi$ mass thresholds. The remaining three $X(4274)$, $X(4500)$ and $X(4700)$ appear as conventional charmonium states with quantum numbers $3^3{P}_1$, $4^3{P}_0$ and $5^3{P}_0$, respectively; and whose masses and widths are slightly modified due to their coupling with the corresponding closest meson-meson thresholds. A particular feature of our quark model is a lattice-based screened linear confining interaction that has been constrained in the light quark sector and usually produces higher excited heavy-quark states with lower masses than standard quark model predictions.

arXiv comment7 pages, 8 tables, 2 figures

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• Observation of String Breaking in QCD
• Instantons at work
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• Quark-model study of few-baryon systems
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• Study of B{+-,0} --> J/ψ K+ K- K{+-,0} and search for B0 --> J/ψ ϕ at BABAR
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• Unquenching the Quark Model and Screened Potentials
• Synchonisation of Resonances with Thresholds

Cited by in corpus (38)

• Non-Standard Heavy Mesons and Baryons, an Experimental Review
• Pentaquark and Tetraquark states
• Multiquark States
• Tetra- and penta-quark structures in the constituent quark model
• Doubly-heavy tetraquarks
• Heavy Quarkonium Hybrids: Spectrum, Decay and Mixing
• Triply-heavy baryons in a constituent quark model
• $X(4140)$, $X(4270)$, $X(4500)$ and $X(4700)$ and their $cs\bar{c}\bar{s}$ tetraquark partners
• Spectrum of the Hidden-Bottom and the Hidden-Charm/Strange Exotics in the Dynamical Diquark Model
• The S- and P-wave low-lying baryons in the chiral quark model
• Strong decays of higher charmonium states into open-charm meson pairs
• Spectroscopy of ${\mathbf{B}}_{\mathbf{c}}$ mesons and the possibility of finding exotic ${\mathbf{B}}_{\mathbf{c}}$-like structures
• Hidden-Bottom Pentaquarks
• Investigating the excited ${\Omega }_c^0$ states through ${\Xi }_{c}K$ and ${\Xi }_c^{{}^{\prime }}K$ decay channels
• Doubly Charmed Pentaquarks
• $QQ\bar{s}\bar{s}$ tetraquarks in the chiral quark model
• Canonical interpretation of the $X(4140)$ state within the ${}^3{P}_0$ model
• Light-meson masses in an unquenched quark model
• Towards the discovery of novel $B_c$ states: radiative and hadronic transitions
• Radial and orbital Regge trajectories in heavy quarkonia
• Can the state $Y(4626)$ be a $P$-wave tetraquark state $[cs][\bar{c}\bar{s}]$?
• X(3872) in an unquenched quark model
• Investigation of $cs\bar{c}\bar{s}$ tetraquark in the chiral quark model
• Quark structure of the ${\chi }_{\mathrm{c}}(3P)$ and $X(4274)$ resonances and their strong and radiative decays
• The scalar exotic resonances X(3915), X(3960), X(4140)
• $Y(4626)$ in a chiral constituent quark model
• Dynamics of the quark-antiquark interaction and the universality of Regge trajectories
• Bottomonium-like tetraquarks in a chiral quark model
• $X$ structures in $B^{+}\to J/\psi \varphi K^{+}$ as one-loop and double-triangle threshold cusps
• $X$ and $Z_{cs}$ in $B^{+}\to J/\psi \varphi K^{+}$ as $s$-wave threshold cusps and alternative spin-parity assignments to $X(4274)$ and $X(4500)$
• The two-channel exotic charmonium-like resonances in the mass region $(3900-4700)$ MeV
• Quark structure of the $X(4500)$, $X(4700)$ and ${\chi }_{\mathrm{c}}(4P,5P)$ states
• Light meson emissions of the selected charmonium-like states within compact tetraquark configurations
• The strong coupling $g_{XJ/\psi \varphi }$ of $X(4700)\to J/\psi \varphi$ in the light-cone sum rules
• Heavy mesons in the Quark Model
• Analysis of the exotic resonances in the systems $QQ\bar{q}\bar{q}$ and $Qq\bar{Q}\bar{q}$ with the extended recoupling model
• ${\Xi }_c(3055)$ as a scaling point to establish the excited ${\Xi }_c^{(\prime )}$ family
• The explanation of some exotic states in the $cs\bar{c}\bar{s}$ tetraquark system