e+ e- ---> e+ e- , barrel
Clear Bhabha event where the electron and positron have associated showers
in the HPC.
Both tracks are measured in the VD, ID and TPC.
The e- (upward in x,y projection) is reconstructed with a momentum of 45.9
GeV/c and has an associated HPC shower of 48.1 GeV.
The e+ (downward in x,y projection) has 37.4 GeV/c momentum
and an associated HPC shower of 44.0 GeV.