A New State of Baryonium

Abstract

The recent discovery of a narrow resonance in the decay $J/\psi \to \gamma p\bar{p}$ is described as a zero baryon number, ``deuteron-like singlet ${}^1{S}_0$'' state. The difference in binding energy of the deuteron (-2.225 MeV) and of the new state (-17.5 MeV) can be accounted for in a simple potential model with a $\lambda \cdot \lambda$ confining interaction.

7 pages

Cited by in corpus (69)

• The hidden-charm pentaquark and tetraquark states
• The Physics of the B Factories
• Observation of a resonance X(1835) in J/ψ--> γπ^+ π^- η^{\prime}
• New Hadron States
• Reinterpreting several narrow `resonances' as threshold cusps
• One-pion-exchange final-state-interaction and the pbar p near threshold enhancement in J/psi -> gamma pbar p decays
• Spin-Parity Analysis of ppbar Mass Threshold Structure in J/psi and psi' Radiative Decays
• Hadron Production via e+e- Collisions with Initial State Radiation
• Proton-Antiproton Annihilation in Baryonium
• Model-independent view on the low-mass proton-antiproton enhancement
• Categorizing resonances X(1835), X(2120) and X(2370) in the pseudoscalar meson family
• Observation of a threshold enhancement in the p \bar{Lambda} invariant mass spectrum
• Observation of a ppb mass threshoud enhancement in ψ^\prime\toπ^+π^-J/ψ(J/ψ\toγp\bar{p}) decay
• A possible 0^{-+} glueball candidate X(1835)
• ppbar enhancement in B and J/Psi decay
• Baryonium with a phenomenological skyrmion-type potential
• On the near-threshold $\bar{p}p$ invariant mass spectrum measured in $J/\psi$ and ${\psi }^{\prime }$ decays
• X(1835): A Natural Candidate of ${\eta }^{\prime }$'s Second Radial Excitation
• The bound state problem of S-wave heavy quark meson-aitimeson systems
• New structures in the proton-antiproton system
• Study of Jψdecaying into ωp \bar p
• Understanding the nature of $D_s(2317)$ and $D_s(2460)$ through nonleptonic B Decays
• X(1835): A Possible Baryonium?
• X(1835) as a baryonium state with QCD sum rules
• Near Threshold Enhancement of p pbar System and p pbar Elastic Scattering
• Baryonia and near-threshold enhancements
• On the mass of the Ds(0+,1+) system
• Baryonium, tetra-quark state and glue-ball in large N_c QCD
• Regge Trajectories Analysis to DsJ(2317), DsJ(2460) and DsJ(2632) Mesons
• $X(1835)$ and the New Resonances $X(2120)$ and $X(2370)$ Observed by the BES Collaboration
• On possible $S$-wave bound states for a $N\bar{N}$ system within a constituent quark model
• Productions of X(1835) as baryonium with sizable gluon content
• Some properties of the newly observed X(1835) state at BES
• Study of $J/\psi \to \omega p\bar{p}$ at BESIII
• X(1835), X(2120) and X(2370) in a flux tube model
• Rescattering Effect and Near Threshold Enhancement of $p\bar{p}$ System
• Parity, Charge Conjugation and SU(3) Constraints on Threshold Enhancement in $J/\psi$ decays into $\gamma p\bar{p}$ and $Kp\bar{\Lambda }$
• Measurements of psi'-> pbar K+ sigma0 and chi_cj->pbar K+ Lambda
• Interaction of real and virtual $p\bar{p}$ pairs in $J/\psi \to p\bar{p}\gamma (\rho ,\omega )$ decays
• Glueballs, Hybrids, Pentaquarks : Introduction to Hadron Spectroscopy and Review of Selected Topics
• Baryon Antibaryon Nonets
• Spectroscopy of ${\mathrm{q}}^3{\bar{\mathrm{q}}}^3$-States in Quark Model and Baryon-Antibaryon Enhancements
• Near threshold ppbar enhancement in the J/psi -> omega ppbar decay
• A possible mechanism for producing the threshold enhancement in $J/\psi \to \gamma p\bar{p}$
• Measurement of the Spin-Dependence of the pbar-p Interaction at the AD-Ring
• The $X(2239)$ and $\eta (2225)$ as hidden-strange molecular states from $\Lambda \bar{\Lambda }$ interaction
• Analysis of the X(1835) and related baryonium states with Bethe-Salpeter equation
• Observation of $J/\psi$ Electromagnetic Dalitz Decays to $X(1835)$, $X(2120)$ and $X(2370)$
• Strong and Electromagnetic Decays of X(1835) as a Baryonium State
• Higher twist corrections to doubly-charmed baryonic $B$ decays
• Angular distributions in $J/\psi \to p\bar{p}{\pi }^0(\eta )$ decays
• The proton-antiproton mass threshold structure in psi(3686) radiative decay revisited
• Observation of $\psi (3686)\to p\bar{p}\varphi$
• Baryonia with open and hidden strange
• Search for the decay mode $B^0\to pp\bar{p}\bar{p}$
• Search for the decay ${\overline{B}}^0\to {\Lambda }_{\mathrm{c}}^{+}\overline{p}p\overline{p}$
• BES Results on J/psi decays and Charmonium Transitions
• Observation of the decays ${\chi }_{cJ}\to n{K}_S^0\bar{\Lambda }+c.c.$
• Protonium: Discovery and Prediction
• Nonstrange baryonia
• Search for the process $e^{+}{e}^{-}\to J/\psi +X(1835)$ at $\sqrt{s}\approx 10.6$GeV
• Study on $N\bar{N}$ $S$-wave Elastic Cross Section and Possible Bound States Within a Constituent Quark Model
• Possible production of exotic baryonia in relativistic heavy-ion collisions
• Analysis of the $X(1835)$ as a baryonium state with Bethe-Salpeter equation
• Extracting beta and the new D_{sJ} resonances
• Decay Widths of X(1835) as Nucleon-Antinucleon Bound State
• Understanding light scalar meson by color-magnetic wavefunction in QCD sum rule
• Baryons and baryoniums in the perspective of QCD sum rules
• Observation of ${\chi }_{cJ}(J=0,1,2)\to p\bar{p}\eta \eta$