Current StHbtEvent(Dave Hardtke)
unsigned short mEventNumber;
unsigned short mCtbMultiplicity; // Central Trigger Barrel
unsigned short mZdcAdc[2]; // ZDC values east/west
unsigned short mNumberOfTracks;
unsigned short mNumberOfGoodTracks;
float mReactionPlane[2]; // reaction plane/error
StHbtThreeVector mPrimVertPos;
StHbtTrackCollection* mTrackCollection;
StHbtV0TrackCollection* mV0TrackCollection; //***