Baryonia and near-threshold enhancements

Abstract

The baryon-antibaryon spectrum consisting of strange, charm and bottom quarks is studied in the color flux-tube model with a multi-body confinement interaction. Numerical results indicate that many low-spin baryon-antibaryon states can form compact hexaquark states and are stable against the decay into a baryon and an antibaryon. The multi-body confinement interaction as a binding mechanism plays an important role in the formation of the states. They can be searched in the $e^{+}{e}^{-}$ annihilation and charmonium or bottomonium decay if they really exist. The newly reported states, X(1835), X(2370), Y(2175), Y(4360) and Y_b(10890), may be interpreted as $N\bar{N}$, $\Delta \bar{\Delta }$, $\Lambda \bar{\Lambda }$, ${\Lambda }_c{\bar{\Lambda }}_c$ and ${\Lambda }_b{\bar{\Lambda }}_b$ states, respectively.

8 pages, 3 figures

References in corpus (19)

• Heavy quarkonium: progress, puzzles, and opportunities
• Constituent quark model study of the meson spectra
• Observation of a near-threshold enhancement in the e+e- -->Lambda_c+Lambda_c- cross section using initial-state radiation
• Confirmation of the X(1835) and observation of the resonances X(2120) and X(2370) in J/psi->gamma pi^+pi^-eta'
• Stability of multiquarks in a simple string model
• Possible Deuteron-like Molecular States Composed of Heavy Baryons
• A Uniform Description of the States Recently Observed at B-factories
• The meson-exchange model for the $\Lambda \bar{\Lambda }$ interaction
• The effect of hidden color channels on nucleon-nucleon interaction in quark model
• About the Casimir scaling hypothesis
• Stability of hexaquarks in the string limit of confinement
• Baryonium, tetra-quark state and glue-ball in large N_c QCD
• Baryonium Study in Heavy Baryon Chiral Perturbation Theory
• Colour field flux tubes and Casimir scaling for various SU(3) representations
• X(1835), X(2120) and X(2370) in a flux tube model
• Quantum chromodynamics quark benzene
• QCD quark cyclobutadiene and light tetraquark spectrum
• Analysis of the X(1835) and related baryonium states with Bethe-Salpeter equation
• Dynamical study of the light scalar mesons below 1 GeV in a flux-tube model

Cited by in corpus (21)

• Interpreting $Z_c(3900)$ and $Z_c(4025)/Z_c(4020)$ as charged tetraquark states
• Coupled-Channel Effects for the Bottomonium with Realistic Wave Functions
• Selected strong decays of $\eta (2225)$ and $\varphi (2170)$ as $\Lambda \bar{\Lambda }$ bound states
• Observation of a resonant structure in $e^{+}{e}^{-}\to K^{+}{K}^{-}{\pi }^0{\pi }^0$
• Mass spectrum and strong decays of strangeonium in a constituent quark model
• Systematic study of $Z_c^{+}$ family from quark model's perspective
• Hidden charmed states and multibody color flux-tube dynamics
• The $ss\bar{s}\bar{s}$ tetraquark states and the newly observed structure $X(2239)$ by BESIII Collaboration
• Light baryonium spectrum
• Heavy pentaquark states and a novel color structure
• Can the state $Y(4626)$ be a $P$-wave tetraquark state $[cs][\bar{c}\bar{s}]$?
• Possible $D^{(\ast )}{\bar{D}}^{(\ast )}$ and $B^{(\ast )}{\bar{B}}^{(\ast )}$ molecular states in the extended constituent quark models
• Production of $\varphi (2170)$ and $\eta (2225)$ in a kaon induced reaction
• Study of light tetraquark spectroscopy
• The fully-light vector tetraquark states with explicit P-wave via the QCD sum rules
• Measurement of $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }\eta$ from 3.5106 to 4.6988 GeV and study of $\Lambda \bar{\Lambda }$ mass threshold enhancement
• Looking for bound states and resonances in the ${\eta }^{\prime }K\bar{K}$ system
• Light tetraquark states with exotic quantum numbers $J^{PC}=2^{+-}$
• Measurement of the $e^{+}{e}^{-}\to K_S^0{K}_L^0{\pi }^0$ cross sections from $\sqrt{s}=$ 2.000 to 3.080 GeV
• A quark core-gluon model for heavy hybrid baryons
• Baryons and baryoniums in the perspective of QCD sum rules