$Y(4626)$ in a chiral constituent quark model

Abstract

Recently, Belle Collaboration reported a new exotic state $Y(4620)$ with mass at 4625.9 MeV in the positronium annihilation process. Inspired by experiment, we study the tetraquark system $c\bar{s}s\bar{c}$ with quantum numbers $J^P=1^{-}$ in the framework of chiral constituent quark model with the help of Gaussian expansion method. Two structures, diquark-antidiquark and meson-meson, with all possible color and spin configurations are considered. The result shows that no bound state can be formed. To investigate the possible resonance states, the real scaling method is employed. Several resonance states with energies 4354, 4408, 4469, 4497 and 4531 MeV, are proposed. Taking into account the errors in calculating the $q\bar{q}$ mesons, the system errors in the calculation of four-quark system are around 60$\sim 100$ MeV. The resonance with energy 4531 MeV is possible the candidate of the newly found state $Y(4620)$.

6 pages, 3 figures

References in corpus (13)

• Observation of a resonance-like structure in the pi^+- psi' mass distribution in exclusive B-->K pi^+- psi' decays
• Constituent quark model study of the meson spectra
• Measurement of e^+e^- to pi^+pi^-J/psi Cross Section via Initial State Radiation at Belle
• Evidence for a Narrow Near-Threshold Structure in the $J/\psi \varphi$ Mass Spectrum in $B^{+}\to J/\psi \varphi K^{+}$ Decays
• Hidden charm octet tetraquarks from a diquark-antidiquark model
• The $X(4140)$, $X(4274)$, $X(4500)$ and $X(4700)$ in the relativized quark model
• $X(4140)$, $X(4270)$, $X(4500)$ and $X(4700)$ and their $cs\bar{c}\bar{s}$ tetraquark partners
• Interpretation of Axial Resonances in J/psi-phi at LHCb
• Canonical description of the new LHCb resonances
• Analysis of the mass and width of the $Y(4274)$ as axialvector molecule-like state
• Observation of a vector charmoniumlike state in $e^{+}{e}^{-}\to D_s^{+}{D}_{s1}(2536{)}^{-}+c.c.$
• Investigation of $cs\bar{c}\bar{s}$ tetraquark in the chiral quark model
• Reanalysis of the $X(4140)$ as axialvector tetraquark state with QCD sum rules

Cited by in corpus (9)

• Y(4626) as a molecular state from interaction $D_s^{\ast }{\bar{D}}_{s1}(2536)-D_s{\bar{D}}_{s1}(2536)$
• Evidence for a vector charmonium-like state in $e^{+}{e}^{-}\to D_s^{+}{D}_{s2}^{\ast }(2573{)}^{-}+c.c.$
• Electromagnetic properties of the $T_{cc}^{+}$ molecular states
• Investigation of ${\Xi }_c^0$ in a chiral quark model
• Study of $qqq\bar{q}Q$ pentaquark system in the Chiral Quark Model
• Investigation of $qqqs\bar{q}$ pentaquarks in a chiral quark model
• $Y(4626)$ as a $P$-wave $[cs][\bar{c}\bar{s}]$ tetraquark state
• Looking for a vector charmonium-like state $Y$ in $e^{+}{e}^{-}\to \bar{D}{D}_1(2420)+c.c.$
• Search for $e^{+}{e}^{-}\to \varphi {\chi }_{c0}$ and $\varphi {\eta }_{c2}(1D)$ at center-of-mass energies from 4.47 to 4.95 GeV