D_ee vs M_ee evaluated at the beam pipe for MC signal. Events in the box M_ee(BP).lt.15 MeV and D_ee(BP).lt.2.5 cm are rejected.		color eps
D_ee vs M_ee evaluated at the beam pipe for $\phi$ background. Events in the box M_ee(BP).lt.15 MeV and D_ee(BP).lt.2.5 cm are rejected.		color eps
Spectrum of the pipiee invariant mass after the cuts on the momenta (top panel) and after the cut to reject events with photon conversions (bottom panel) have been applied. The black histogram is the expected distribution, i.e. signal MC (dark grey), $\phi$ background (light grey) and continuum background (white). The three samples have been normalized according to their luminosity.		color eps
$\ppee$ invariant mass spectrum on a wide range AFTER THE FIT. The background scale factors have been obtained as described in section \ref{sec:fit-invmass}. Dots: data. The black histogram is the expected distribution, i.e. signal MC (dark grey), $\phi$ background (light grey) and continuum background (white).		color eps
$\ppee$ invariant mass spectrum zoomed around the $\eta$ mass AFTER THE FIT. The background scale factors have been obtained as described in section \ref{sec:fit-invmass}. Dots: data. The black histogram is the expected distribution, i.e. signal MC (dark grey), $\phi$ background (light grey) and continuum background (white).		color eps
$\ppee$ invariant mass spectrum zoomed around the $\eta$ mass AFTER ALL CUTS but the one on the $\ppee$ invariant mass itself. The background scale factors have been obtained as described in section \ref{sec:fit-invmass}. Dots: data. The black histogram is the expected distribution, i.e. signal MC (dark grey), $\phi$ background (light grey) and continuum background (white).		color eps
$\ppee$ invariant mass spectrum zoomed around the $\eta$ mass AFTER ALL CUTS but the one on the $\ppee$ invariant mass itself. The background scale factors have been obtained as described in section \ref{sec:fit-invmass}. Dots: data. The black histogram is the expected distribution, i.e. signal MC (dark grey), $\phi$ background (light grey) and continuum background (white).		color eps
Opening angle for the $\ee$ pair for events in the signal region. The background scale factors have been obtained as described in section \ref{sec:fit-invmass}. Dots: data. The black histogram is the expected distribution, i.e. signal MC (dark grey), $\phi$ background (light grey) and continuum background (white).		color eps
Opening angle for the $\pp$ pair for events in the signal region. The background scale factors have been obtained as described in section \ref{sec:fit-invmass}. Dots: data. The black histogram is the expected distribution, i.e. signal MC (dark grey), $\phi$ background (light grey) and continuum background (white).		color eps
Invariant mass of the $\ee$ pair for events in the signal region. The background scale factors have been obtained as described in section \ref{sec:fit-invmass}. Dots: data. The black histogram is the expected distribution, i.e. signal MC (dark grey), $\phi$ background (light grey) and continuum background (white).		color eps
Invariant mass of the $\pp$ pair for events in the signal region. The background scale factors have been obtained as described in section \ref{sec:fit-invmass}. Dots: data. The black histogram is the expected distribution, i.e. signal MC (dark grey), $\phi$ background (light grey) and continuum background (white).		color eps
Definition of the angle $\phi$ between the pion and electron decay planes.		color eps
Distribution of the $\spcp$ variable in the signal region. The background scale factors have been obtained as described in section \ref{sec:fit-invmass}. Dots: data. The black histogram is the expected distribution, i.e. signal MC (dark grey), $\phi$ background (light grey) and continuum background (white).		color eps
Comparison between theoretical prediction and experimental measurements of the branching ratio. The band spans between the lower theoretical prediction -1 sigma (Jarlskog et al.) and the maximum theoretical prediction +1 sigma (Faessleret al., where the error is not explicitly quoted and has been evaluated [by us] about 10% of the central value).		color eps