  The separation and reconstructions of charged hadron and neutral hadron from
their overlapped showers in electromagnetic calorimeter is very important for
the reconstructions of some particles with hadronic decays, for example the tau
reconstruction in the searches for the Standard Model and supersymmetric Higgs
bosons at the LHC. In this paper, a method combining the shower cluster in
electromagnetic calorimeter and the parametric formula for hadron showers, was
developed to separate the overlapped showers between charged hadron and neutral
hadron. Taking the hadronic decay containing one charged pion and one neutral
pion in the final status of tau for example, satisfied results of the
separation of the overlapped showers, the reconstructions of the energy and
positions of the hadrons were obtained. An improved result for the tau
reconstruction with this decay model can be also achieved after the application
of the proposed method.
