X(1835): A Possible Baryonium?

Abstract

We point out that (1) the large $p\bar p$ coupling and suppressed mesonic coupling of X(1835) and (2) the suppression of the three-body strange final states strongly indicate that X(1835) may be a $p\bar p$ baryonium. We also point out that the branching ratio of $X(1835)\toηππ$ should be bigger than that of $X(1835)\toη^\prime ππ$. If BES further confirms the non-observation of X(1835) in the $ηππ$ channel, that will be very puzzling. Finally, X(1835) may be used a tetraquark generator if X(1835) is really established as a baryonium state.

Comments and suggestions welcome