• For the visualization space points are needed, thus the big DST is used.
  The data fields are accessed via the following pointers (header file):
  • vertex: vertex_fit
    • position: x, y, z
    • chi2 probability: pchi2
  • global rtracks: g_ptr_list -> rtrack_glb_p
    • space points: point_p recursively
    • fitted trajectory: x, y, z and px, py, pz as starting point, using trkstep
  • global tracks: g_ptr_list -> rtrack_glb_p -> first_track_p
    • track flag: iflag
    • charge: sign of qpxz
    • momentum at vertex: px, py, pz
    • impact parameter: bx, by
  • actual/potential point ratios: rtrack_quali->n_point / rtrack_quali->n_max_point
• Event selection
  • p+p (using Gábor's list)
    • vertex_fit->pchi2 > 0 ®
    • -585 < vertex_fit->z < -574 ®
    • (vertex_fit->x)**2+(vertex_fit->y)**2 < 1 ®
  • p+Pb (using Gábor's list)
    • vertex_fit->pchi2 > 0 ®
    • -583.43 < vertex_fit->z < -577.43 ®
    • (vertex_fit->x)**2+(vertex_fit->y)**2 < 1 ®