On the three prong side, the track in the middle (blue) is measured in the VD, ID, TPC, OD as a positive with 14.0 GeV/c momentum. It appears as MIP in the HPC and has a hard shower associated in the HAB. It is thus hadronic, probably Pi+.
The other two tracks (in red) are seen on a blown-up view to join at the entry of the TPC. They have no hits in the ID nor VD. One is positive with 8.0 GeV/c, the other negative with 2.3 GeV/c. They are MIP or unseen in the HPC. They have an opening angle in Theta of 5.2 degree, which excludes a photon conversion. They correspond to the decay of a K0_S.