sPHENIX tracking discussion

["Frawley, Anthony" <afrawley AT fsu.edu>]

Hi All,

Following up on Christof's request at the tracking meeting this morning, I extracted the cluster resolutions for clusters matched to tracks embedded in Hijing events. Here are the RMS numbers for reconstructed cluster position minus truth cluster position:

Clusters matched to Hijing embedded pion tracks:

r-phi resolution:    MAPS = 4.5 microns   INTT = 28.3 microns    TPC = 128 microns

Z resolution:          MAPS = 4.7 microns    INTT = 4745 microns   TPC = 151 microns

Clusters matched to standalone 100 pion event tracks:

r-phi resolution:    MAPS = 4.5 microns   INTT = 27.4 microns    TPC = 126 microns

Z resolution:          MAPS = 4.8 microns    INTT = 4800 microns   TPC = 159 microns

Note that it is important that these are clusters matched to tracks. That means that the tracker has already rejected clusters it does not like.

Bottom line: Not much change for clusters associated with Hijing embedded tracks.

Cheers

Tony