Observation of two charged bottomonium-like resonances in Y(5S) decays

Abstract

We report the observation of two narrow structures in the mass spectra of the pi+-Y(nS) (n=1,2,3) and pi+-hb(mP)(m$ (m=1,2) pairs that are produced in association with a single charged pion in Y(5S) decays. The measured masses and widths of the two structures averaged over the five final states are M_1=(10607.2+-2.0) MeV/c2, Gamma_1=(18.4+-2.4) MeV and M_2=(10652.2+-1.5) MeV/c2, Gamma_2=(11.5+-2.2) MeV. The results are obtained with a 121.4 1/fb data sample collected with the Belle detector in the vicinity of the Y(5S) resonance at the KEKB asymmetric-energy e+e- collider.

6pages, 3 figures

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• Molecular tetraquarks and pentaquarks in chiral effective field theory
• The production of neutral $N^{\ast }(11052)$ resonance with hidden beauty from ${\pi }^{-}p$ scattering
• $b\bar{b}u\bar{d}$ four-quark systems in the Born-Oppenheimer approximation: prospects and challenges
• Holographic three flavor baryon in the Witten-Sakai-Sugimoto model with the D0-D4 background
• Results in $B_s$ physics and bottomonium spectroscopy using the Belle ${\rm Y}(5S)$ data
• $B_s{B}^{\ast }K$ and $B_{s}B{K}^{\ast }$ vertices using QCD sum rules
• Contribution of $Z_b$ resonances to ${\rm Y}(5S)\to \pi \pi \pi {\chi }_b$
• Hadronic resonances enhanced by thresholds
• Prediction of charmoniumlike structures in the hidden-charm di-eta decays of higher charmonia
• Are there near-threshold Coulomb-like Baryonia?
• Role of the short-range dynamics in the formation of $D^{(\ast )}{\bar{D}}^{(\ast )}/B^{(\ast )}{\bar{B}}^{(\ast )}$ hadronic molecules
• Predictions of ${\rm Y}(4S)\to h_b(1P,2P){\pi }^{+}{\pi }^{-}$ transitions
• Systematics of fully heavy dibaryons
• QCD string in excited heavy-light mesons and heavy-quark hybrids
• Gluonic Hidden-charm Tetraquark States
• Observation of $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}{\pi }^0{\chi }_{b1,2}(1P)$ and search for $e^{+}{e}^{-}\to \varphi {\chi }_{b1,2}(1P)$ at $\sqrt{s}=$10.96---11.05 GeV
• Doubly Heavy Tetraquarks and Baryons
• Charged-to-neutral heavy meson yield ratio at the Z_b^0 resonances as a probe of the I^G(J^P)=0^-(1^+) channel
• Constituent counting rule for exclusive production of heavy quarkoniumlike exotic resonance and a light hadron
• Gluons, Light and Heavy Quarks in the Instanton Vacuum
• Quark structure of the $X(4500)$, $X(4700)$ and ${\chi }_{\mathrm{c}}(4P,5P)$ states
• $D$ wave bottomonia production from $Z_b^{(\prime )}$ decay
• On the emergence of heavy quark spin symmetry breaking in heavy quarkonium decays
• Spin Partners of the $B^{(\ast )}{\bar{B}}^{(\ast )}$ resonances with a different approach than the Breit-Wigner parameterization
• Experimental review of the ${\rm Y}(1S,2S,3S)$ physics at $e^{+}{e}^{-}$ colliders and the LHC
• Unified description of BaBar and Belle data on the bottomonia decays Upsilon(mS) -> Upsilon(nS) pi+ pi-
• Modification by pion exchange of near threshold resonance line shape in open heavy flavor channel
• Predictions for Bottomonium from a Relativistic Screened Potential Model
• Dynamical picture for the exotic XYZ states
• Effect of the $K\overline{K}$ and $\eta \eta$ channels and interference phenomena in the two-pion and $K\overline{K}$ transitions of charmonia and bottomonia
• Sum rules for tetraquark decay coupling constants with broken SU(3) symmetry
• Disentangle the nature of resonances in coupled-channel models
• Sum rules for interaction of ${\rm Y}$ resonances with $Z_b\pi$
• Towards a Theoretical Understanding of the XYZ Mesons from QCD
• Schottky Anomaly and Hadronic Spectrum
• Dynamical generation of hadronic resonances
• Isospin violation in the yield of S-wave heavy meson pairs near threshold
• Theory Concepts for Heavy Exotic Mesons
• Multiquark States in the Thomas-Fermi Quark Model and on the Lattice
• Quark spin structures of bottom-charmed threshold molecular states
• Determining Compositeness of Hadronic Resonances: the $\Lambda (1405)$ Radiative Decay and the $a_0(980)$-$f_0(980)$ Mixing
• All-charm tetraquarks at hadron colliders: A high-precision fragmentation perspective
• Possible ${\Sigma }_c^{\ast }\bar{\Sigma }$ molecular states
• Application of the Thomas Fermi Quark Model to Multiquark Mesons
• Production of the bottomonium-like states $Z_b$ states at $e$-$h$ and ultraperipheral $h$-$h$ collisions
• Investigation of the $X(4020)$ peak in the $D^{\ast }{\bar{D}}^{\ast }$ and $\pi h_c$ channels
• Predicting the Masses of Exotic Hadrons with Data Augmentation Using Multilayer Perceptron
• Properties of bottomonium in a relativistic quark model
• Prediction of an $I(J^P)=0(1^{-})$ $\bar{b}\bar{b}ud$ Tetraquark Resonance Close to the $B^{\ast }{B}^{\ast }$ Threshold Using Lattice QCD Potentials
• Doubly-charmed pentaquark states in a mass splitting model
• Mass spectrum of the $\Omega \bar{\Omega }$ states
• Search for light tetraquark states in ${\rm Y}(1S)$ and ${\rm Y}(2S)$ decays
• Two charmoniumlike charged axial resonances near 3885 MeV
• Including heavy spin effects in a lattice QCD study of static-static-light-light tetraquarks
• Hidden charm and bottom molecular states
• Investigation of Doubly Heavy Tetraquark Systems using Lattice QCD
• Diquark correlations in baryons: the Interacting Quark Diquark Model
• Beauty Hadron Spectrum in a Screened Potential Model
• Production of hidden-heavy and double-heavy hadronic molecules at the $Z$ factory of CEPC
• Zb tetraquark channel and $B{\bar{B}}^{\ast }$ interaction from lattice QCD
• Hadron and Quarkmonium Exotica
• Lattice spectroscopy with focus on exotics
• Study of $e^{+}{e}^{-}\to h^{+}{h}^{-}J/\psi (h=\pi ,K,p)$ via initial-state radiation at Belle~II
• Observation of the first iso-spin Charmonium-like State $Z_c(4020)$ }
• Compositeness of Hadrons and Near-Threshold Dynamics
• Charmed baryons and their interactions
• Decay coupling constant sum rules for tetraquarks $\mathbf{T}[(\bar{\mathbf{Q}}\mathbf{q})(\mathbf{Q}\bar{\mathbf{q}})]$ with broken SU(3) symmetry
• X, Y, Z Search at Belle II
• Compositeness and several applications to exotic hadronic states with heavy quarks
• Search for $h_b(2P)\to \gamma {\chi }_{bJ}(1P)$ at $\sqrt{s}=10.860$ GeV
• Exotic Quarkonium Spectroscopy: X(3872), Z_b(10610), and Z_b(10650) in Non-Relativistic Effective Theory
• Exotic baryons from a heavy meson and a nucleon
• Exotic hadrons associated with $b$-quark
• Systematic exploration of triply heavy tetraquarks: spectroscopic and decay characteristics
• Mass-Spectroscopy of [$bb][\bar{b}\bar{b}$] and [$bq][\bar{b}\bar{q}$] tetraquark states in a diquark-antidiquark formalism
• The interference effects of multi-channel pion-pion scattering contributions to the final states of $\Psi$- and ${\rm Y}$-meson family decays
• On the origin of the narrow peak and the isospin symmetry breaking of the $X$(3872)
• Exotic Charmonium-like States at BESIII