Detailed event comparison PPV & VPD vertex, (Rosi)

 BFC

"DbV20080712 pp2008 ITTF OSpaceZ2 OGridLeak3D beamLine >VFPPVnoCTB  debug logger"
star/data05/scratch/balewski/2008-daq/st_fmsslow_9060086_raw_1090001.MuDst.root 

Detailed event count

1271 Events ,
256 Events with no PPV vertex,
271 Events with vpd vertex,
144 with at least one PPV vertex matching the vpd,
136 events with the 0 ranked vertex matching the vpd,
10 Events with the 1 ranked vertex matching the vpd ,
49 Events with no PPV vertex  and a vpd Vertex,
5 Events with multiple vertices matching the vpd ,
1 Event with 2 ranked Vertex matching the vpd (multiple match),
1 Event with 3 ranked vertex matching  the vpd (multiple match)

44 Events out of 222 with both PPV and vpd vertex have all vertices
outside of 50 cm of vpd. 11 of these have more than 1 PPV vertex

 Conclusion: out of 271 events with VPD vertex:

  • 49 (18%) has no PPV vertex
  • 151 (56%) has one of PPV vertex closer than 8 cm from VPD vertex
  • 71 (26%)  none of PPV vertices is closer than 8 cm to VPD vertex

 

VertexAnalysis8cm.txt file lists (for the events with a vpd vertex) the event #, # of vertices, rank of each vertex that matches vpd.