sPHENIX discussion of software

["Osborn, Joe" <osbornjd AT ornl.gov>]

Dear all,

 

Chris merged a PR today that changes the outward facing API of the SvtxTrack DST object in the track reconstruction. There were a number of obsolete and/or extraneous member variables removed, which makes the object lighter weight and better for our computational needs. The relevant points:

 

1. An SvtxTrack object no longer has a list of clusters associated to it, it has two track seeds which contain the cluster lists (a seed for the MVTX+INTT and a seed for the TPC+TPOT).
2. Extraneous variables related to the calo matching were replaced by a single TrackState with the calo projection information (e.g. x,y,z and px,py,pz of the projection).
3. Extraneous default DCA variables were removed in favor of user calculated values, which may depend on a particular analysis. The track position and associated vertex are still available as before.

 

This will be relevant in the next iteration of MDC2 track reconstruction, whenever that may be. If you have questions please don’t hesitate to ask.

 

Joe Osborn

 

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Joe Osborn, Ph.D.

Associate Research Scientist

Oak Ridge National Laboratory

osbornjd AT ornl.gov

(859)-433-8738