Exotic $1^{--}$ States in QCD Sum Rules

Abstract

Using the QCD sum rules we test if the charmonium-like structure Y(4260), observed in the $J/\psi \pi \pi$ invariant mass spectrum, can be described with a $J/\psi f_0(980)$ molecular current with $J^{PC}=1^{--}$. We consider the contributions of condensates up to dimension six and we work at leading order in ${\alpha }_s$. We keep terms which are linear in the strange quark mass $m_s$. The mass obtained for such state is $m_Y=(4.67\pm 0.09)$ GeV, when the vector and scalar mesons are in color singlet configurations. We conclude that the proposed current can better describe the Y(4660) state that could be interpreted as a $\Psi (2S)f_0(980)$ molecular state. We also use different $J^{PC}=1^{--}$ currents to study the recently observed $Y_b(10890)$ state. Our findings indicate that the $Y_b(10890)$ can be well described by a scalar-vector tetraquark current.

new version accepted for publication in Phys. Rev. D

References in corpus (18)

• Heavy quarkonium: progress, puzzles, and opportunities
• Observation of Two Resonant Structures in e+e- to pi+ pi- psi(2S) via Initial State Radiation at Belle
• Can the X(3872) be a 1^{++} four-quark state?
• Are Y(4260) and {\rm Z${}_2^{+}$(4250)} ${\mathrm{D}}_1\mathrm{D}$ or ${\mathrm{D}}_0{\mathrm{D}}^{\ast }$ Hadronic Molecules?
• The Vector and Axial-Vector Charmonium-like States
• Evidence that the Y(4660) is a f_0(980)psi' bound state
• Erratum: QCD sum rules study of the $J^{PC}=1^{--}$ charmonium $Y$ mesons
• Scalar Resonance Contributions to the Dipion Transition Rates of ${\rm Y}(4S,5S)$ in the re-scattering model
• QCD sum rules study of the meson Z^+(4430)
• Peak shifts due to $B^{(\ast )}-{\bar{B}}^{(\ast )}$ rescattering in ${\rm Y}(5S)$ dipion transitions
• The meson $Z^{+}(4430)$ as a tetraquark state
• On the nature of the X(3872) from QCD
• Can the ${\pi }^{+}{\chi }_{c1}$ resonance structures be $D^{\ast }{\bar{D}}^{\ast }$ and $D_1\bar{D}$ molecules?
• Do the QCD sum rules support four-quark states?
• Width of exotics from QCD sum rules : tetraquarks or molecules?
• Strong decays and dipion transitions of Upsilon(5S)
• Interference effects in the X(4260) signal
• Could $Y_b(10890)$ be the P-wave $[bq][\bar{b}\bar{q}]$ tetraquark state?

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• Role of $Y(4630)$ in the $p\bar{p}\to {\Lambda }_c{\bar{\Lambda }}_c$ reaction near threshold
• Studying the $D_{1}D$ molecule in the Bethe-Salpeter equation approach
• Analysis of the vector hidden-charm-hidden-strange tetraquark states with implicit P-waves
• A new decay mode of higher charmonium
• $Y(4626)$ as a $P$-wave $[cs][\bar{c}\bar{s}]$ tetraquark state
• 1-- and 0++ Four-Quarks and Molecules from QCD Spectral Sum Rules
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• Charmonium decays into ${\Lambda }_c{\bar{\Lambda }}_c$ pair governed by the hadronic loop mechanism
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