An Estimate of the Partial Width for X(3872) into p p-bar

Abstract

We present an estimate of the partial width of X(3872) into p p-bar under the assumption that it is a weakly-bound hadronic molecule whose constituents are a superposition of the charm mesons D^{*0} D-bar^0 and D^{0} D-bar^{*0}. The p p-bar partial width of X is therefore related to the cross section for p p-bar to D^{*0} D-bar^0 near the threshold. That cross section at an energy well above the threshold is estimated by scaling the measured cross section for p p-bar to K^{*-} K^+. It is extrapolated to the D^{*0} D-bar^0 threshold by taking into account the threshold resonance in the 1^{++} channel. The resulting prediction for the p p-bar partial width of X(3872) is proportional to the square root of its binding energy. For the current central value of the binding energy, the estimated partial width into p p-bar is comparable to that of the P-wave charmonium state chi_{c1}.

arXiv comment12 pages

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• Multiquark Resonances
• QCD and strongly coupled gauge theories: challenges and perspectives
• On the scattering of D and D* mesons off the X(3872)
• A Phenomenological analysis on isospin-violating decay of $X(3872)$
• X(3872) and the bound state problem of $D^0{\bar{D}}^{\ast 0}$ (${\bar{D}}^0{D}^{\ast 0}$) in a chiral quark model
• Measurements of the branching fractions of $B^{+}\to p\bar{p}{K}^{+}$ decays
• Investigating charmonium production at LHC with the p pbar final state
• Production of X(3872) at PANDA
• Determination of the structure of the $X(3872)$ in $\bar{p}A$ collisions
• New Spectroscopy with PANDA at FAIR: X, Y, Z and the F-wave Charmonium States
• New Experiments with Antiprotons
• Parton Model Calculation of Inclusive Charm Production by a Low-energy Antiproton Beam
• Proposed New Antiproton Experiments at Fermilab
• Prospects for Antiproton Experiments at Fermilab
• Test of the $X(3872)$ Structure in Antiproton-Nucleus Collisions