GLB, STA, trig rates, firsts ... troubleshooting

Problem:

  • STA: 1/5events, GLB:1/.... --> many STA fakes (?) --> dirrect implication on the trigger rates (xxx), higher than acceptable

Investigation

  • look at number of valid, bad,lost hits for STA muons, from DT, CSC, RPC separately, vs pT, eta.
  • verify the same info versus the trigger firing

Results

  • staLastHitDetId_v2.pdf:
    • many bad STA, on which we most certainly trigger
    • last hit position is on second CSC station--expected for punch-through.
    • --> increase trigger rate with fake/bad muons;

Now what?

  • change the trigger, to fire when having 3 stations hits (as opposed to 2); L2 trigger.

-- CameliaMironov - 09-Nov-2010

  • validHIts vs layer in all STA:
    nvalidRatioLayer.gif

  • pt<10GeV, sta all:
    staPtEtaAll_ptlt10.gif

  • all sta, pt vs eta:
    staPtEtaAll.gif
Topic attachments
I Attachment HistorySorted ascending Action Size Date Who Comment
GIFgif nvalidRatioLayer.gif r1 manage 6.3 K 2010-11-09 - 20:16 CameliaMironov validHIts vs layer in all STA
PDFpdf staLastHitDetId_v2.pdf r1 manage 138.7 K 2010-11-09 - 18:02 CameliaMironov  
GIFgif staPtEtaAll.gif r1 manage 6.0 K 2010-11-09 - 21:20 CameliaMironov all sta, pt vs eta
GIFgif staPtEtaAll_ptlt10.gif r1 manage 7.4 K 2010-11-09 - 21:20 CameliaMironov pt<10GeV, sta all
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Topic revision: r4 - 2010-11-09 - CameliaMironov
 
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