Estimate of the partial width for X(3872) into pp

We present an estimate of the partial width of X(3872) into pp under the assumption that it is a weakly bound hadronic molecule whose constituents are a superposition of the charm mesons D*0D0 and D0D*0. The pp partial width of X is therefore related to the cross section for pp→D*0D0 near the threshold. That cross section at an energy well above the threshold is estimated by scaling the measured cross section for pp→K*-K+. It is extrapolated to the D*0D0 threshold by taking into account the threshold resonance in the 1++ channel. The resulting prediction for the pp 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 pp is comparable to that of the P-wave charmonium state χc1