W z to muons preshutdown
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W/Z to Muons (Preshutdown). Muon Trigger Rates Single Muons: For L=5e30 the L1 Rate: mu1cmsc_fz ~ 70 hz. Forward was about the same. Trigger was prescaled by >20 X. Dimuon Trigger was unprescaled Acceptance & Efficiency Muon ID requires A-layer.

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W z to muons preshutdown
W/Z to Muons (Preshutdown)

  • Muon Trigger Rates

    • Single Muons: For L=5e30 the L1 Rate: mu1cmsc_fz ~ 70 hz. Forward was about the same. Trigger was prescaled by >20 X.

    • Dimuon Trigger was unprescaled

  • Acceptance & Efficiency

    • Muon ID requires A-layer.

    • Central A-layer was hot and/or couldn’t be read-out (SRQ timeouts).

    • The combination nearly eliminated nseg=+-3 muons

  • Lum ~ 1 or 2 pb-1.

  • N(Z)=L* s*A*e < 20 events.

  • N(W) ~ same as Z’s, coming in mainly on mu-jet triggers.


W z to muons preshutdown1
W/Z to Muons (Preshutdown)

  • We didn’t readout much CFT but we did have the SMT, albeit with eff’y ~20% (from Z->ee)

  • We spent our time on more useful pursuits

    • Checking Fundamentals

      • unpacking of hits

      • calibration of PDT timing

      • detector orientation via scanning

      • investigating scintillator time gates with algorithm development in mind

    • Developing muon ID definitions

      • “Tight” & “Loose” and Why

      • Learning how to use the central tracker

    • Inventing data access tools. La Macchina & WZ_Reco


W z to muons preshutdown2
W/Z to Muons (Preshutdown)

  • Reco 10.07 output On D0mino /prj_root/754/wz2_2/tuples files wz_p10.07.01*_isoMuon.root and wz_p10.07.01*_nisoMuon.root contains all of the muons which passed the following cuts:

    • MuoTrfit_whits_bc>2

    • MuoTrfit_itnber>0

    • MuoTrfit_chi2>0

    • MuoTrfit_whitsA>1

    • MuoTrfit_s!hitsA>0

    • MuoTrfit_s!hitsBC>0

    • MuoTrfit_pt_muot>8 GeV/c

    • Isolated if DR(m-jet[0.5])>0.5

  • This is neither “tight” nor “loose” but is the best we could do in p10.07


W z to muons preshutdown summary
W/Z to Muons (Preshutdown) Summary

  • W/Z-> muons are rare. We don’t have events to spare.

  • Instead of spending time looking for a few events we are working, instead on fundamentals of m ID

  • We plan to continue our work along those lines

  • See a different talk about our post-shutdown plans for winter conference analysis.


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