  The low energy scattering of heavy positively charged particles on hydrogen
atoms (H) are investigated by solving the Faddeev equations in configuration
space. A resonant value of the pH scattering length, $a=750\pm 5$ a.u., in the
pp antisymmetric state was found. This large value indicates the existence of a
first excited state with a binding energy B=1.14$\times10^{-9}$ a.u. below the
H ground state. Several resonances for non zero angular momenta states are
predicted.
