Quarkonium wave functions at the origin

We tabulate values of the radial Schr\"odinger wave function or its first nonvanishing derivative at zero quark-antiquark separation, for cc\ifmmode\bar\else\textasciimacron\fi{}, cb\ifmmode\bar\else\textasciimacron\fi{}, and bb\ifmmode\bar\else\textasciimacron\fi{} levels that lie below, or just above, the flavor threshold. These quantities are essential inputs for evaluating production cross sections for quarkonium states.