+// global arrays and pointers
+Float_t p[3];
+Float_t x[3];
+Float_t *cov = NULL; // set to NULL because not provided
+Float_t *pid = NULL; // set to NULL because not provided
+AliAODVertex *primary = NULL;
+AliAODVertex *secondary = NULL;
+AliAODTrack *currTrack = NULL;
+