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2008 PPV vertex finder status

Updated on Thu, 2008-08-07 11:57. Originally created by balewski on 2008-06-12 12:34.

Mission statement:  PPV finds only Z-vertex (as of June 2008)

 

Identified improvements for PPV as of June 2008

• reco vertex in X-Y for high mult events à produce beam-line constrain used in 2nd pass
• fold in VPD vertex to global track weighting to amplify tracks from trigger vertex
• add FGT tracks (η of [1,2] ) to improve efficiency for forward triggered events
* add IST, SSD matching to amplify trigger vertex (potential ... black hole, SVT never succeeded)


Maintenance

• evaluate PPV performance with M-C physics eve + M-C pileup  up to 1.2 interactions/ bXing
• evaluate PPV  with M-C physics eve + zero-bias real event (embedding) – never done

• protect assert() statements – the ultimate warrant of sanity of results

* “annual checkup” before real data production

 

Attached slides summarize status and identified improvements for the PPV as in June of 2008.

For the reference other PPV pages are:

 

Fig 1

 

Fig 2

 

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