Puzzles in hadronic transitions of heavy quarkonium with two pion emission

Abstract

We study the anomalously large rates of some hadronic transitions observed in heavy quarkonia using a constituent quark model which has been successful in describing meson and baryon phenomenology. QCD multipole expansion (QCDME) is used to described the hadronic transitions. The hybrid intermediate states needed in the QCDME method are calculated in a natural, parameter-free extension of our constituent quark model based on the Quark Confining String (QCS) scheme. Some of the anomalies are explained due to the presence of a hybrid state with a mass near the one of the decaying resonance whereas others are justified by the presence of molecular components in the wave function. Certain unexpected results are pointed out.

arXiv comment8 pages, 7 tables. arXiv admin note: text overlap with arXiv:hep-ph/0601044 by other authors

References in corpus (21)

• 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
• Constituent quark model study of the meson spectra
• Quark-model study of few-baryon systems
• Ab Initio Study of Hybrid b-bar-gb Mesons
• Hybrid and Conventional Mesons in the Flux Tube Model: Numerical Studies and their Phenomenological Implications
• Observation of anomalous Upsilon(1S)pi+pi- and Upsilon(2S)pi+pi- production near the Upsilon(5S) resonance
• Determination of the $\psi (3770)$, $\psi (4040)$, $\psi (4160)$ and $\psi (4415)$ resonance parameters
• Study of the reaction e^{+}e^{-} -->J/psiπ^{+}π^{-} via initial-state radiation at BaBar
• Heavy quarkonium hybrids from Coulomb gauge QCD
• Constituent quark model description of charmonium phenomenology
• QCD Multipole Expansion and Hadronic Transitions in Heavy Quarkonium Systems
• Observation of overlapping spin-1 and spin-3 ${\bar{D}}^0{K}^{-}$ resonances at mass $2.86\mathrm{GeV}/c^2$
• Scaling of the 3P0 strength in heavy meson strong decays
• Tetraquark interpretation of the BELLE data on the anomalous ${\rm Y}(1S){\pi }^{+}{\pi }^{-}$ and ${\rm Y}(2S){\pi }^{+}{\pi }^{-}$ production near the ${\rm Y}(5S)$ resonance
• Scalar Resonance Contributions to the Dipion Transition Rates of ${\rm Y}(4S,5S)$ in the re-scattering model
• Tetraquark-based analysis and predictions of the cross sections and distributions for the processes e^+ e^- --> Upsilon(1S) (pi^+ pi^-, K^+ K^-, eta pi^0) near Upsilon(5S)
• Spectra and decays of hybrid charmonia
• A New Analysis of the R Measurements: Resonance Parameters of the Higher Vector States of Charmonium
• Charmonium in lattice QCD and the non-relativistic quark-model
• Analysis on Heavy Quarkonia Transitions with Pion Emission in Terms of the QCD Multipole Expansion and Determination of Mass Spectra of Hybrids

Cited by in corpus (16)

• Bottomonium Mesons and Strategies for Their Observation
• Bottomonium spectrum revisited
• Molecular components in P-wave charmed-strange mesons
• Triply-heavy baryons in a constituent quark model
• Spectroscopy of ${\mathbf{B}}_{\mathbf{c}}$ mesons and the possibility of finding exotic ${\mathbf{B}}_{\mathbf{c}}$-like structures
• Charmed-strange Meson Spectrum: Old and New Problems
• Threshold effects in P-wave bottom-strange mesons
• Doubly Charmed Pentaquarks
• The long and winding road from chiral effective Lagrangians to nuclear structure
• Towards the discovery of novel $B_c$ states: radiative and hadronic transitions
• Higher Hybrid Bottomonia in an Extended Potential Model
• Bottomonium spectrum with a Dirac potential model in the momentum space
• M1 Radiative and spin-nonflip $\pi \pi$ transitions of $B_c$ states in the Cornell potential model
• Parton distribution functions of ground state mesons composed of $c$ or $b$ quarks
• Canonical interpretation of $Y(10750)$ and ${\rm Y}(10860)$ in the ${\rm Y}$ family
• Spectroscopy and Decay Properties of Excited Charmonium States